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Shauna is such a fucking bitch. Seriously. Mari still can’t believe she called Gen’s house to change her mind about picking Mari up from their stupid study session after she was already there. She had to ask Gen to give her a ride home instead—like she hasn’t been looking forward to Shauna going down on her parked around the block from their house all day. Like that’s not half the point of Shauna driving her everywhere now that she has her own car.
The neighborhood is dark and all the lights in the Ibarra-Shipman household are off as Mari gets out of Gen’s dad’s SUV that Gen can’t technically, legally drive. Even the light in Mari and Shauna’s shared bedroom. Great. So Shauna’s not even waiting up to fuck Mari’s brains out. She’s just not getting laid at all today.
There’s always the Magic Wand that Van gifted her during the not-school-sanctified Yellowjackets white elephant gift exchange last year in a move Mari still can’t pin down as either weird but thoughtful or rude and mocking. But it’s not like Mari’s ever been able to get herself off with that or anything else for that matter. And even if she could, she’s not sure anything will ever live up to how it feels to have her cunt stretched out by three of her step-sister’s fingers or to have Shauna latch onto her clit like her life depends on it.
“Mari, are you okay?” When she turns around to look, Gen’s got her window rolled down and her head sticking out of it.
She blinks a few times, realizing that she’s been standing there in her driveway dumbly for a good minute. “Yeah, just thinking about if I should wake Shauna up to be a dick.”
Gen cracks a grin. “Always. Screw her.”
God, Mari wishes. Or at least—Shauna should be screwing her right about now. If Shauna had picked her up like she was supposed to, Mari would probably be on her third orgasm right about now. She should really rein her thoughts in. Her panties are starting to feel a little… wet.
Because, unlike Shauna, Gen is nice (sometimes),—not to mention a good friend (usually)—she waits in her car until Mari is at her front door, then she’s driving off into the night.
Even though their parents know she was out, Mari keeps quiet as she comes in and kicks her shoes off to put on her chancletas. She’s trying not to think about how much she misses Shauna’s fingers curling deep inside her. She’d kill to hear that filthy squelching sound as Shauna fucks her so hard she can’t think.
Fuck. She wants Shauna to take care of her, but Shauna fucking hates her apparently and cancelled on her for no reason other than she has better things to do than fuck Mari in her stupid gross car. Well, fuck Shauna and her shitty car. Mari’s going to fuck herself with the stupid Magic Wand even if she wakes Shauna up and pisses Shauna off in the process. Maybe she’s never been able to make herself cum before, but it’s not like she’s tried since Shauna walked in on her masturbating in August and smugly asked if she needed a hand. Her pussy pulses at the memory. She can feel herself getting wetter. She shouldn’t have worn a skirt today. Her inner thighs are slicking up as she tiptoes up the stairs. Her panties are gonna be ruined at this rate. Will Shauna want them? She likes taking Mari’s panties and pocketing them, especially when Mari wears skirts. She even used to steal them before she first got Mari on her back, begging for it. Mari’s seen her sniffing them, and the thought has her pussy clenching around nothing miserably.
She pushes their bedroom door open, kicks her chancletas off, and bunches her skirt up to pull her panties down before she’s even closed the door. And then her bedside lamp flicks on, and there’s Shauna on her bed stroking her cock like this is normal. It’s so big that Mari forgets what she’s doing and stumbles with her panties down at her knees. Her head is full of static. Her pulse is in her pussy. She must be seeing things because Shauna doesn’t have a cock; otherwise Mari would have seen it before, licked it and had her throat fucked by it and came all over it and been bred by it, and she really needs to revisit that idea later because the idea of her step-sister knocking her up is sending shivers down her spine. God, that thing strapped between Shauna’s legs looks heavy and hard and like it won’t fit inside of Mari—and Shauna’s going to stretch her out with it anyway until she’s sobbing and her poor, abused pussy can’t possibly take any more.
Her legs feel like Jell-O at the thought.
“Welcome home, honey,” Shauna says. She’s smirking in that stupid hot smug way she does when she knows Mari’s desperate for it.
It makes Mari even wetter. Shauna’s fingers are so, so fucking good, but Mari hasn’t had a cock in her since Danny Mears dumped her three weeks ago (for his fucking cousin of all fucking people, but maybe Mari can’t judge since she was fucking her step-sister behind his back), and Shauna’s is so much bigger than his ever was. She needs Shauna splitting her wide open now or she thinks she might die.
She doesn’t even think to close the door behind her before she hurries onto Shauna’s lap, wrapping one arm around Shauna’s neck. She positions herself over her sister’s cock and pushes her hand away from the base of it to line it up with her cunt without a word.
“Slut,” Shauna groans as Mari sinks down.
The stretch makes Mari’s toes curl and her breath hitch into a whine. She’s never taken something this big before, never been this full. Maybe she should have let Shauna finger her first to warm her up for it, but there are stars dotting her vision, and nothing has ever felt this good before. “Fuck, you’re too big,” she says, gasping. But she doesn’t stop sinking down, and then, just when the stretch feels like too much in the best possible way, the tops of Shauna’s thighs are flush against the bottom of hers. It’s all the way inside her. Her pussy flutters around it, and she feels faint. Mari has always been too sensitive for her own good—part of her is screaming to pull herself off of Shauna because this feels too good, and she thinks she might scream. The rest of her thinks she was made to take Shauna’s cock. How have they never done this before?
She’s dazed and breathless and can’t believe she was mad at Shauna earlier, can’t remember what Shauna could ever have done to piss her off, can barely remember her own last name.
“Are you gonna sit there all night or are you gonna ride your step-sister’s cock, Mar?” Shauna sounds almost bored when she says it.
Mari can’t help the whimper she lets out at the idea that Shauna might be bored, might really want to be doing something other than fucking Mari. Her hips are moving before she can even think how much she needs to fuck herself on Shauna’s cock. It feels so much better than riding Danny ever did. She’s so much fuller, stretched out and needy as her walls flutter around Shauna with every stroke. Even with her bra and shirt still on, Mari can feel her tits bouncing as she rocks faster and faster with Shauna’s hands gripping her hips to help her fuck herself, squelching Shauna’s cock in and out of her humiliatingly loudly.
Distantly, she remembers that she left the door open—someone could hear how wet and desperate she is. Their parents or her brothers who already think she’s a slut. They don’t need to hear what a slut she is, frantically taking her step-sister’s cock in her sopping cunt. She buries her face in Shauna’s neck to try to muffle herself as the coil in her stomach grows hotter and tighter. Her walls pulse tightly around Shauna, squeezing in rhythm with each thrust and bringing Shauna deeper. It feels so good it hurts—and she knows from experience that without Shauna’s hands to guide her, she’d be squirming away, unable to get herself over the edge.
Except there’s a pressure she recognizes building with her orgasm.
Oh, fuck.
She’s gonna piss herself if she doesn’t pull off of Shauna right now.
Gasping, she pulls back a fraction from Shauna, trying to ease off of her cock. “Fuck—fuck, Shauna, I need—”
Shauna’s hips buck up and drive her cock into Mari in a way that makes her squeak. “What else could you possibly need, you greedy slut?”
“’m gonna pee, Shauna—God—please, I need to—”
But Shauna’s hands are still firm on Mari’s hips, rocking them against Shauna’s, refusing to let Mari off of her cock, and this isn’t funny. She’s really going to fucking piss herself if Shauna doesn’t knock it off.
“Seriously, Shauna—oh—I have to piss, please—let me up—I—fuck—I can’t hold it.” Mari can’t help all the pathetic gasps and whimpers that escape her as she begs Shauna to just let her go to the bathroom. She’s so tender and full, and it’s so goddamn much her calves are cramping and her toes won’t uncurl—she’s gonna piss herself, and it’s all Shauna’s fault.
“Sounds fine to me, Mar,” Shauna says, sounding so fucking gleeful that Mari should hit her. “Come on, you dumb slut. Piss on your sister’s cock.”
Her hips are still just fucking going, and she’s not even really fighting Shauna on that anymore. What’s wrong with her? She’s really going to—oh, fuck.
She’s cumming so hard her vision blurs until it’s dark, and she thinks she can hear herself whimpering into Shauna’s neck, but she knows she can feel the gush of embarrassing, mortifying wetness flooding out of her pussy and all over Shauna’s cock. Worst of all, Shauna is still fucking her, rocking her hips up into Mari’s, abusing her tender cunt like each stroke isn’t making more of the humiliating wetness spill out from Mari’s pussy. Her nails bite into Shauna’s shoulders, but the rest of her is so limp she can’t do anything but whine and take it as Shauna works more and more piss out of her.
She’s too old to wet herself, but she can’t stop either.
How the fuck is she ever going to look Shauna in the eye again?
Mari’s honest-to-God crying now with salt-streaked cheeks and broken little gasps, her pussy fluttering as Shauna keeps rocking her on her cock. The thrusts aren’t getting shallow enough for Mari to be done fucking leaking piss like a goddamn child. Shauna’s never going to want to fuck her again because it might have been funny to her when Mari thought she was going to piss herself, but that doesn’t mean she’s okay with Mari actually wetting herself all over her cock.
“I’m sorry, ’m sorry, Shauna. I didn’t mean to—” Her throat feels almost as raw as her pussy does. Dazedly, she remembers the door is still open. She should shut up, but she can’t. She just keeps gasping and squelching over Shauna’s cock. She’s so fucking embarrassed. Her face is burning—and Shauna won’t stop fucking her, even if it’s softer now. Her pussy is going to be so sore tomorrow. Everyone’s going to know she got fucked so hard she pissed herself.
But Shauna just strokes her hair and plants a kiss on her shoulder. “Shh, Mari. That was so fucking hot. But you just squirted. You didn’t piss yourself. We’ll have to work on that later.”
Mari whines at that. She doesn’t want to work on that later. She doesn’t want to actually piss herself. Doesn’t Shauna see how embarrassing that is for her? But she’s too full and tender to complain the way she should right now. And it feels good to have Shauna taking care of her like this, fucking her and petting her and peppering her with kisses. So Mari just nuzzles into Shauna and closes her eyes, trying not to think about washing her bedding or if Shauna will really try to make her piss herself.
If Shauna thinks she’s sneaky, she’s dead fucking wrong. Like hell Mari doesn’t know what Shauna’s doing, standing over her and trying to look intimidating as she takes a swig from her water bottle in-between drills. They’re at practice, and the whole fucking team—including their coaches, and Shauna knows Mari used to call Coach Martinez “Tío” outside of school—is like right there, so frankly it’s freaky Shauna is even thinking about it. Like, okay, thinking about fucking in front of their team is one thing. Mari gets that. Maybe she’s even kind of thinking about it right now. But if Shauna doesn’t take her gross fucking piss kink or whatever away from Mari, she’s going to do something drastic. Like not put out for an entire day.
Probably.
She thinks she could go a day without it at least.
… Will Shauna let her refuse to put out for a day? She can get pushy if Mari says she’s tired or has cramps or something… It’s way hotter than it should be. Like, sure, Shauna listens if Mari really says no, but… there’s something sexy about how much she wants Mari.
“Fuck off, Shipman,” she says, glaring up at her complete pervert of a step-sister. Seriously. Just because the squirting incident ended up being maybe the best orgasm of Mari’s life (not that she’s even had that many to compare it to; she only started getting off when Shauna started fucking her… even if Shauna’s spent these past few months testing how many times Mari can cum in a row) doesn’t mean that Mari’s going to let her pull that shit (well, piss) again.
Shauna has the audacity to look offended. She puts her hand to her chest and everything like she can’t believe Mari’s being so mean. She’s such a bitch. “What’s your problem, Mari? I’m just worried about your hydration. I mean, Coach Martinez is still pissed at you for getting red carded last game. He’s definitely gonna make you do extra laps.” She’s so full of shit. Mari really should kick her ass some day. She could totally take Shauna. In a fight.
Well. Okay. So, duh, she knows she can take Shauna in bed. That’s the problem right now. But Mari could beat her ass if she tried. She’s got like three inches on Shauna, and she used to roughhouse with Travis Martinez before they got old enough that he got embarrassed after accidentally touching her breasts while they were fighting about if she’d beaten him in a race or not (she totally did; Mari’s a goddamn Varsity athlete, and Travis runs 9 minute miles). Shauna doesn’t look like she’s ever been in a fight in her life.
But she also throws Mari around like a rag doll sometimes in the bedroom. And in her car. And in the handicapped stall if no one’s around. And in the woods during parties if they can sneak away. And under the bleachers that one time.
“I’m fine, Shauna, you’re being fucking weird.” She takes another gulp from her water bottle, trying not to be bothered by the slight pressure in her bladder. She does not have to pee—Shauna isn’t making her piss herself again. Um. Ever. Whatever. It’s not her fault her creepy pervert of a step-sister wouldn’t let her pull herself off of that stupid plastic cock.
Her pussy did not just pulse. Nope. She’s better than that. Totally.
“Come on. I’m just being a good big sister. I’m taking care of you like Mom and Dad want me to,” Shauna says, looking down at Mari with those big, deep eyes like she’s thinking about what Mari looks like naked and squirming beneath her, face-down and ass-up as Shauna fucks her so hard she thinks she might just burst. And like—okay, objectively, “big sister” is really stretching it. Their parents have been together since they were freshmen, but Shauna and Mari only even actually became step-sisters in June, and Shauna’s like four months older than her which barely counts. But it still makes her pussy clench around nothing as she disguises her whimper with a cough.
She shifts uncomfortably, hoping the fabric of her shorts won’t stick together at the crotch. She made the mistake of wearing a thong today. Shauna’s favorite pair that Mari’s been allowed to keep, a lacy black thing that barely qualifies as underwear at all so Shauna doesn’t even have to push it aside to finger fuck Mari parked outside Jackie’s house at seven in the morning. It had already bitten her in the ass when Shauna ruined them this morning by sticking her hand down Mari’s jeans and stretching her pussy out so bad Mari can almost still feel it.
Looking up at Shauna, she feels her stomach swoop in submission. She has to do it. She downs the rest of her water bottle and hopes Shauna will call her a good girl later. She rarely ever does—the best Mari can usually get is “good slut” which always sounds so condescending and hot that she doubts Shauna means it.
Shauna’s lips curl into a sadistic smile as Mari’s throat bobs, greedily swallowing every last drop for her and trying hard to not think about what it’ll be like if Shauna really makes her piss herself. She hasn’t wet herself since she was maybe seven—and that was an emergency that was totally not her fault. Her parents wouldn’t pull over to let her pee on a road trip because her brothers were finally asleep instead of wailing and screaming, and she couldn’t hold it any longer. Extenuating circumstances surely.
If she wets herself now, for Shauna, for her step-sister, then she’s seriously fucking gone. Not an ounce of self-respect left in her surely.
… There’s no way she can do this. Shauna will have to drag her kicking and screaming to make it happen.
That’s a thought to explore mere later actually. Wait. No, that’s so not the point. She’s not a fucking freak like Shauna—not like that at least. Just because she spent a good chunk of her weekend with Shauna’s plastic cock buried in one hole or another (not up her ass; that’s also on the list of things Shauna wants from her that are too fucking freaky) doesn’t mean Mari has no dignity. She just… has less than normal when there’s the promise of Shauna fucking her brains out.
Mari can’t help but press her thighs together, feeling a throbbing in her cunt that feels a little too close to having to piss for comfort. But she’s fine. She might let Shauna have knowing that she needs to piss, but she’s not letting Shauna between her legs before she uses the bathroom.
That doesn’t make Shauna look any less evil and smug as Coach Scott blows his whistle to signify that their water break is over.
Mari shoves her water bottle back into her bag. She’s about to push herself up to her feet when Shauna holds her hand out. That’s new. Mari’s stomach does a little somersault as she takes Shauna’s hand and lets herself be helped to her feet. They don’t really do stuff like that—hand-holding, she means. Mari’s not sure she’s ever even hugged Shauna one-on-one. They’ve joined in on group hugs together with the team, and they’ve wrapped arms around each other’s shoulders in huddles, and—well, Shauna’s held Mari down and fucked her a lot. But Shauna’s not exactly a touchy-feely person with Mari outside of all the groping and fondling.
She kind of misses the warmth of Shauna’s palm against hers once Shauna lets go of her hand. She tries not to think about what that could mean as they jog over to Coach Scott with the rest of the team. It’s not like it’s the first time she’s been struck by how much she likes Shauna’s hands on her. Not by a long shot.
Mari swears she blinks, and all of a sudden everyone else has taken a knee around Coach Scott, and they’re looking up at her like she’s stupid for not having done the same. Before she can blink a second time, Shauna tugs the hem of her shorts a little harder than she needs to so the thin band of her thong peeks out. Her face burns as she takes a knee and tugs the waistband of her shorts back up. Ugh. Knowing Shauna that was on purpose.
“Now, some of you have problems with authority. Some of you think it’s okay to talk back to refs. Some of you even get red carded for this behavior.” Coach Scott is using that voice he always adopts when he wants to call Mari a dumb fuck or whatever, but he can’t because she’s a student. It feels distinctly crappier than normal today since Mari actually did something wrong this time.
It’s not like she doesn’t get that she should’ve shut up after the ref held up a yellow card. But she didn’t even deserve the yellow card—it was a bullshit call. She didn’t even foul that metal mouth midfielder once. That girl took a fucking dive if Mari ever saw one all because her footwork was too sloppy to get possession of the ball while they were going toe to toe for it. If anything, she tripped over her own feet. Not to mention she spent the entire first half yanking on Mari’s jersey every chance she got, and the ref never once called her on it.
“So Coach Martinez and I think you guys need to be reminded of a little thing called discipline. That means you guys are doing suicides until we think you’ve learned your lesson. All right. Line up.” Coach Scott blows his stupid little whistle as most of the team, including their captain, Jenna, groans and gives Mari nasty looks.
“Thanks a lot, Mar,” Melissa says with a stupid little huff.
Maybe she deserves that, but Mari still makes a mental note to tell everyone Melissa has lice later. It’s probably true anyway, given her affinity for gay ass hats.
Shauna opens her mouth like she wants to say something, but then someone else’s hand is clapping down on Mari’s shoulder. When she turns to see who, it’s Jackie, smiling kindly. “Everyone will get over the suicides. We all know that call sucked. Just try to take a deep breath and remember we need you on the pitch with us next time.”
It’s definitely a lot more encouraging than whatever Shauna was going to say, which is why they all know that, to Tai’s chagrin, next year Jackie will be captain, but Mari still feels a twinge of guilt over the way Shauna purses her lips and jerks her head into a nod. No, that’s her bladder actually. God, she wishes she could ask to go use the restroom quickly, but there’s no chance in hell Coach Martinez or Coach Scott will let her get out of even a minute of her punishment.
Mari spends the rest of practice, from the suicides that seem to last forever to the dribbling drills that follow them after to the passing drills they close on, trying not to think about how much she needs to pee. But of course, trying not to think about it just makes her that much more aware of how full her bladder is and how it’s putting pressure on something in her pussy that’s making her feel kind of needy, but she absolutely under no circumstances is gonna let Shauna touch her until she’s gone to the bathroom—alone, thank you very much.
When the last whistle blows, finally dismissing them from practice, Mari makes a beeline for her bag. She can’t help but squirm a bit about how badly she needs to piss. Honestly, maybe she shouldn’t even grab her bag. Maybe she should just leave it for now—Shauna will grab it if she does, and Mari doesn’t want to know what she’ll do if she lets herself get intercepted before she can pee. Probably.
Like a shark to blood, Shauna is there, grabbing Mari’s wrist before she can go. “Forgetting something?” She makes it sound so innocent, nodding towards Mari’s bag.
“Um, I just—I really have to—”
Shauna’s face is unmoved. She looks so fucking gleeful and smug. It’s hotter than Mari wants it to be.
She can’t help but squirm in her spot, her thighs pressing tight together and the need to piss and to be fucked both worsening as Shauna watches her. She feels like prey with Shauna trapping her. And she can definitely feel that in her needy cunt. God, there’s something wrong with her.
Van picks that moment to give them a weird look. “If you guys keep dicking around you’re gonna get the bad shower stall.”
Mari blinks. “Stalls.”
“Whatever. I’m not getting one of the janky ones. You’re on your own, Mar.” Something about the shit-eating grin on Van’s face makes Mari finally yank her wrist out of Shauna’s grasp.
She misses Shauna’s touch immediately.
“You heard her, Mar. Let’s go shower.” Shauna’s using that low, commanding voice she adopts when she’s going to ruin Mari. It’s even more thrilling and scary to hear where other people might notice it.
Most of the team don’t seem to be giving them a second thought. Maybe they wouldn’t even notice if Mari kissed Shauna right now if she moved fast enough. As much as Mari should want to throttle Shauna, she just wants to kiss the air out of her lungs.
Better not risk it. Jackie is giving them an even weirder look than Van did, and she honestly gets so weird about Mari and Shauna these days. Like maybe she knows they’re fucking.
That thought shouldn’t be exciting.
Mari grabs her bag and follows Shauna to the locker room with her head bowed like an obedient dog, thinking desperately about how Shauna could make her wet herself in there and how embarrassing that would be. She’d never live it down. She slows down at the thought, something electric and shameful shooting down to her clit.
Shauna looks back over her shoulder and raises her eyebrow like Mari’s being unreasonable and throwing a tantrum or something. She doesn’t say a fucking word. There’s that smug little smile tugging at her lips.
Mari clenches her cunt instinctively. She’s not sure if the bit of wetness that trickles out is arousal or piss, and she’s not willing to find out. She whimpers and bolts, dropping her bag in the process.
Shauna is faster than her. The thought of being tackled and pinned in public like this should not make her insides throb so badly, so Mari decides it doesn’t and refuses to glance back to see if Shauna is chasing her.
“What’s wrong with her?” Jackie sounds genuinely baffled, but it’s definitely better for Mari to confuse her teammates than to humiliate herself in front of them.
Mari makes it to the bathroom so desperate that she doesn’t even lock the stall door behind her as she scrambles to get her shorts and thong down. It feels unbelievably good to pee, the relief of it hitting Mari like an orgasm and making her sigh, her eyes fluttering shut.
Not that she likes piss or anything. She’s not a total fucking freak.
Eyes still closed, she’s breaking toilet paper off from the roll and folding it to wipe when there’s a loud bang of metal on metal. Her eyes burst open, and there’s Shauna, looking like Mari spat in her food.
Mari fights the urge to roll over and submit. She huffs instead. “Occupied, asshole.”
Shauna locks the door behind her as she comes into the stall, towering over Mari. “I didn’t say you could go to the bathroom.”
“Wh—I don’t need your permission, Shauna. You’re not the boss of me.” She knows she’s being petulant. That’s why she says it.
There’s that arched eyebrow again. Shauna folds her arms in front of her chest, and Mari tries not to notice the way it accentuates her tits even in her sweaty gym shirt and sports bra. “That’s not what you were saying this morning when I was inside you. Or last night when you opened your legs for me and begged me to eat you out. But I mean, if you don’t like that—”
“No, no, I didn’t say that!” Mari feels pathetic just saying it, but the thought of Shauna ending this opens up a horrible pit in her stomach.
“That’s what I thought. But then you ran away so I couldn’t take care of you. Do I have to put you on a leash?”
Mari whimpers and tries to close her legs so Shauna can’t see how embarrassingly wet she is, but Shauna grabs her knee and growls. Her cunt pulses. She spreads her legs wider.
She’s still holding the toilet paper uselessly. Something drips down from her pussy into the bowl. She’s not sure if it’s her piss or the slick of her arousal. She’s not sure if the difference matters.
Shauna’s breath hitches. Her eyes are glued to Mari’s cunt.
“… Can I, um… wipe?” Mari says, face burning.
“Yes.” Shauna is breathless. She looks like her birthday came early. Then again, Mari’s usually not this obedient even when Shauna isn’t being a fucking pervert about something as disgusting as this.
Mari makes eye contact as she does it, her hips shifting at the cold, slick feeling of her arousal being dragged along her pussy.
The sound of Shauna’s breathing has gotten heavy. She almost sounds like does when she’s just fucked Mari senseless and is about to drag Mari by the hair to her pussy and let Mari eat her out. She licks her lips, and Mari feels stupidly jealous of Shauna’s tongue. “Good girl.”
Mari’s head spins. She’s smiling too giddily, but she can’t bring herself to stop. Shauna called her a good girl. Shauna never calls her a good girl.
The waistband of her thong snaps against her. She blinks.
“Off. These are mine now,” Shauna says.
“But we still have to shower—”
Shauna just glares at her. “What happened to being a good girl to make it up to me?”
Dizzily, Mari peels her thong off and holds it out. She tries not to giggle when Shauna presses the skimpy little thing to her nose and takes a fucking huff before she stuffs Mari’s thong in her own boy shorts.
Shauna is such a fucking freak that she needs to steal Mari’s panties at school in the bathroom where anyone could walk in, and even that’s not satisfying enough for her. That’s how bad she wants Mari. How could that not be so hot that Mari just lets her?
“Don’t think you’re off the hook yet, you dumb slut,” Shauna says.
Mari whimpers, spreading her legs a little wider as her pussy flutters.
Shauna’s jaw tenses. “Stop being a whore. I don’t care how desperate you are. I’m not fucking you until we get home.”
Fuck, Mari doesn’t know if she can wait, but Shauna can be so fucking difficult, so goddamn strict. If she says not until they’re home, she means it. She always gets so mad when Mari can’t wait, when she’s too needy to go without at least Shauna’s fingers on her clit to tide her over. She squeezes her eyes shut and tries to stand, pulling her shorts up as she goes. She’s so sensitive now that it hurts when she straightens her legs out, her thighs brushing together in a way that makes her shudder.
“Hurry up. Everyone already thinks it’s fucking weird you ran away like that.” Shauna unlocks the stall door, looking at Mari like she’s scum on Shauna’s favorite shoes.
If Mari’s cunt wasn’t drooling directly onto her shorts, she’d remember to be offended—or at least defensive about how she wouldn’t have run away if Shauna wasn’t so fucking determined to make her piss herself. But her cunt is drooling all over her shorts, so she just bows her head sheepishly and leaves the stall to wash her hands.
When they finally get to the locker room after grabbing Mari’s bag, most of the team is still there and gossiping. The way they stop talking when she comes in makes it pretty clear they’ve been gossiping about her.
“Oh, good, you found Mari,” Jackie says. “Are you guys okay?”
Mari tenses up. Shauna’s not going to help her out here. They both know that. “Um, yeah. Sorry. I just—forgot something in my locker.”
Even Laura Lee gives Mari a weird look at that. “And you couldn’t wait to get it…?”
“I didn’t wanna forget. And, uh, I was already sweaty.” It’s flimsy, but it’s better than admitting that her step-sister was trying to make her piss herself, so she panicked.
“Uhuh,” Van says. She exchanges a look with Laura Lee that ends with Laura Lee’s nose scrunching up. Whatever the fuck that means.
“Only the shitty stalls are open. Next time, don’t run away after your mistake costs us extra suicides, and maybe you can use the good stalls,” Taissa says as she closes the clasp on one of her hoops.
Mari’s too busy trying to tell whether or not she likes the way her cunt hurts as she walks over to one of the benches to flip Tai the bird. She drops her bag and peels her shirt and sports bra off. She’s got her shorts halfway down her thighs when Van wolf whistles.
Shit. She didn’t think anyone would notice. Or maybe she just didn’t think because Shauna was holding the good girl thing over her head. That always makes her so light-headed. “Shut up.”
“Shut up about what happened to your panties? Could’ve sworn you had them on when you flashed us earlier.” God, even without turning around, she knows exactly what shit-eating grin Van’s got on.
“I thought you went to your locker. Shauna, didn’t Mari go to her locker?” Jackie says. She even sounds like she’s frowning.
There’s no way they’ll actually come to the conclusion that Shauna has her panties, right? There’s no way anyone will figure out that they’ve been fucking or that Shauna was trying to make her piss herself today. That just can’t happen. It’s not possible. But Mari doesn’t know what on Earth she can say right now to explain this now that Van’s commented on it. Her face feels like it’s been set on fire as she continues undressing and marches into one of the shitty shower stalls and twists the knob, trying to think of what explanation she can give.
“Her period is supposed to start today. That’s why she ran off. This dumbass was wearing a thong because she forgot about it. She was gonna swap them out after her shower since she’s got her period panties stashed in here,” Shauna says.
It might not be the most bullet proof explanation, but this is probably the most Mari has ever appreciated her step-sister when she’s not inside of Mari. Her pussy throbs so hard that she winces. Shauna’s going to eat her alive when they get home. If cartoon birds really did spin around over people’s heads, Mari’s pretty sure she’s dizzy enough to have her own at the thought of that.
Maybe she should let Shauna keep trying to make her piss herself.
… That’s gotta be her cunt thinking for her. Not that she’s into that sort of thing. Shauna’s the nasty one. Really!
Somewhere in the back of Mari’s brain, she knows that their parents are home, that Shauna’s mom—their mom isn’t working the graveyard shift at the hospital tonight, that her dad might be a deep sleeper, but Deb Shipman isn’t. She’ll wake up if she hears their panting in-between sloppy, deep kisses or the sound of them stumbling down the hall all caught up in each other or the thud of Mari’s back against the wall or the humiliatingly loud moan Mari can’t help but let out when Shauna tugs the neckline of her dress down and fits one braless tit into the palm of her hand, squeezing hard enough to hurt. God, she can feel her slick cunt smearing all over her inner thighs. Whispering in her step-sister’s ear that she doesn’t have anything at all on underneath her dress is maybe the best decision she’s ever made if it got them home from that stupid party this quickly, if Shauna’s tongue is licking in her mouth like some kind of fucking animal.
And, okay, Mari has kissed a lot of people, a lot of girls even when she’s drunk enough (it’s not a big deal! Crystal and Lottie are always kissing girls when they’re drunk too), and Shauna might not be the most skilled kisser, but there’s something about the desperation she always fucking attacks Mari with and how she bites and bruises Mari’s lips that makes her knees weak. Her nipples are hard enough to ache as Shauna refuses to give her breasts any more attention than rough, rhythmic squeezes to just one of them, completely ignoring the other no matter how much she whimpers and whines.
She’s rubbing her obscenely slippery thighs together and driving herself crazy with the friction that’s somehow both too much and not nearly enough when Shauna thrusts her knee between them, pushing up into her needy cunt.
Not for the first time, all Mari can think is that this is the hottest thing that’s ever happened.
They’re down the hall from both their bedroom and their bathroom where their parents could find them, too desperate for it to care—or maybe it turns Mari on so much her brain feels fuzzy to think of being caught as she humps Shauna’s leg like a bitch in heat. She can’t think clearly enough to keep kissing Shauna properly as she grinds her naked pussy down, slicking up Shauna’s thigh. It feels so fucking good that she can’t even keep a steady rhythm. She wants it too much, even as her nerves feel like they’re on fire and—shit, is that her bladder again?
She didn’t pee before they left the party, and then Shauna was touching her as soon as Jeff and Jackie started driving off, right there on the porch where Jeff and Jackie could see them if they looked back, and even now, even as the need to piss grows sharper, how can Mari do anything but what Shauna says?
She wants to be good for her step-sister, wants to roll over and let Shauna have her way with her, wants to believe that maybe she doesn’t have to pee. Maybe it’s just that she’s gonna squirt again. But Shauna’s been experimenting with that, and so far, it only happens with penetration, with as many of Shauna’s fingers hooked inside her cunt as she can fit or her cock buried to the hilt, pushing into Mari’s fucking cervix so hard she sees stars and can’t tell if it hurts or not because Shauna is a fucking pervert who couldn’t stand the thought of her cock not being so big Mari can barely take it.
She’s got tears in her eyes as she pants into Shauna’s mouth and arches her back helplessly, her hips stuttering as she gets so, so, so fucking close—but she can’t do it, she still can’t fuck herself into an orgasm. She squirms her hips until her cunt is off of Shauna’s thigh, shaking her head frantically. Fuck, it always hurts even more when she does this right on the edge like that. Her bladder and pussy both feel like they’re fucking throbbing. She hiccups with tears running down her face. “I can’t—I can’t—it hurts so much, Shauna, I’m sorry.” Her eyelids flutter shut.
For once, Shauna lets her. She shushes Mari and pets the back of her head gently before pressing a kiss to each of Mari’s eyelids. “It hurts more when you stop, doesn’t it, pretty girl?”
If Mari was sober, maybe she’d realize how weird it is that Shauna’s being gentle like this with her. Has Shauna ever been gentle while they were fucking before? Even that first time, when Mari had been sobbing and squirming and shaking her head as she got closer and closer, Shauna had just growled at her to shut up and take it, had called her a bitch in a way that shouldn’t have felt like her clit being zapped by lightning.
But it’s so nice to have Shauna petting her and calling her pretty—has Shauna ever called her pretty before?—and Mari is still so hazy from letting Shauna convince her to try milk and Malibu that she just sighs into it and lets herself be comforted.
“Mm, I have to pee.” It’s a mumble that makes Shauna’s hand freeze its motion through her hair. She makes a whiny little sound in the back of her throat and nuzzles her head into Shauna’s neck to demand more attention, more comfort. It doesn’t come, not how she wants it to at least. Her legs are shaking like a newborn deer, but she’s not sure why or where she’s being led. She blinks, and Shauna is gone, abandoning her in their bathroom against the wall with the door open. Someone is huffing—probably her since Shauna just fucking left her, that bitch.
She’s opposite her reflection which should really be more embarrassing than it feels. Her face feels warm as she takes in the sight of her mussed up hair and her exposed breasts and the brown peaks of her nipples, her neckline still shoved down so that the straps of her dress have fallen off her shoulders. She looks wrecked, but she wishes her neck and chest were more marked up. The best she’s got are a few old, fading hickeys along the curves of her tits. Shauna hasn’t even bitten her hard enough to leave a mark recently.
Her bladder throbs again.
Oh. Right. She should probably go while she’s here. Maybe that’s why Shauna left her here, to give her some privacy for once.
That’s… kind of sweet, but Mari can’t help but wish her step-sister was still here, holding her hand or something. Maybe even while she pees. God, she doesn’t know how to tell Shauna she wants to hold hands and shit. They don’t do stuff like that. It makes her feel more miserable than it probably should, but she’s too drunk to actually care.
In the mirror, her reflection is pouting like a kicked puppy. Does that make her Shauna’s kicked puppy? God, maybe Shauna will kick her later. Does she want Shauna to kick her? She’s seen Shauna kick soccer balls a lot, seeing as they’re on the team together, and she knows Shauna kicks hard, so maybe not, but maybe that would get Shauna to hold her hand while she pees.
Fuck, right. Mari should piss before Shauna gets mad at her for taking too long.
She sighs and pushes off the wall, hiking her dress up over her ass and pausing to admire her reflection as she does. She’s got a really nice ass, doesn’t she?
Shauna’s reflection joins hers in the mirror, standing in the doorway with her jeans undone to reveal a harness over her boy shorts. Her hard cock is basically begging for Mari to get on her knees, and whatever seemed so urgent a few seconds ago has completely left Mari’s head.
“Are you that desperate for it, Mar?” Shauna closes the door behind her.
Mari almost drops her dress, but something about the way Shauna is looking at her, intense and predatory like she might eat Mari alive, makes her grip the fabric tighter instead. Her hands tremble. Her wrists feel tingly, electric and cold.
Her step-sister is going to batter her fucking cervix.
“Down, girl,” Shauna says.
There’s more arousal gushing out of her. Her inner thighs are so slippery it’s obscene and gross and hotter than anything should be. She sits on the edge of the tub, opening her legs wide for Shauna. She should be ashamed, presenting her cunt to her step-sister when she kind of needs to piss like some kind of fucking freak. But her pussy flutters around nothing. She doesn’t know what Shauna’s going to do to her first, what she’ll have to do to get Shauna’s cock buried inside her. The thought is so fucking exciting. If she had a tail, it’d be wagging.
God, does Shauna make her wish she had a stupid fucking tail to wag? What’s wrong with her?
Shauna settles between Mari’s legs on her knees. With her left index finger and middle finger, she pulls the lips of Mari’s pussy embarrassingly wide to inspect Mari’s cunt. It’s shameful and sexy and makes her whimper so fucking pathetically as Shauna runs a finger around Mari’s wide open cunt. When her finger pauses at the perineum, Mari writhes helplessly.
“Whose pussy is this?” Shauna says, ghosting her thumb over Mari’s clit just enough for the warmth of it to make Mari’s brain go blank.
“My sister’s,” she gasps.
Shauna’s thumb comes down bruisingly against her clit. It hurts so bad that she tries to jerk away, but Shauna’s thumb just pushes further into her, her other hand abandoning holding her pussy open to wrap around her waist and pin her in place.
It doesn’t take much rubbing at her clit for the pressure in her stomach to swell, for her bladder to throb dangerously, for her thighs to start shaking, for her hips to twitch. She’s sensitive enough without direct clit stimulation. Her nerves are sparking out all around her clit, burning white hot and too much but not enough to send her falling over the edge.
She’s letting out strangled gasps, her vision blurring as her head falls back and everything seems to start to white out.
And then the pressure is lifting, and Shauna is pulling her thumb off of Mari’s clit and leaving Mari dangling there. It’s a thousand times worse than when Mari can’t finish fucking herself. She sobs at the denial.
“What’s wrong, Mar? I thought it was too much.” Shauna sounds so fucking smug.
Mari blinks and her head lolls back down to see that she looks it too.
All Mari can do is whine needily. “More.”
Shauna slaps Mari’s cunt. “Where are your manners, slut?”
“Please. I—I need—” Mari cuts herself off with a sob as her bladder throbs. She should pee. She should tell Shauna needs to get up to piss, and then she can beg Shauna to let her cum. But… but what if Shauna won’t let her cum at all then? Can she hold it while Shauna fucks her?
She has to. She needs to be fucked senseless so badly. There’s no way she can wait.
“What do you need?” Shauna says. She trails her fingers, slick with Mari’s own arousal, across the curve of Mari’s jaw. She rises up off her calves to paint Mari’s wetness down her throat then sucks the skin right over Mari’s pulse into a bruise, dragging her tongue over it.
Mari is almost delirious, her heartbeat picking up as she thinks about how Shauna is tasting her right now, how she hasn’t felt Shauna’s mouth on her cunt in ages.
“I—I need my sister,” she says. “Please, please, I need your mouth on me.” She feels Shauna’s lips curl into a smile against her throat, and she moans low and filthy.
Shauna pulls back, a thread of spit between her mouth and Mari’s throat snapping as she does. “You want me to eat you out?”
Mari nods, frantic and eager. She wants that so bad.
Shauna sets her weight back down onto her calves, then she pushes Mari’s knees wider apart to bring her face before Mari’s cunt. Her breath is hot against it as she just fucking stares at it, making Mari squirm. Shauna’s hands settle around Mari’s hips to hold her still.
Mari is staring down between her legs, desperate to see the moment Shauna licks or sucks or even bites her.
But Shauna doesn’t do any of those things. She sucks her cheeks in and spits, sending a fat glob of saliva over the lips of Mari’s pussy.
A whimpering Mari recoils at the feeling, but her toes curl, and her calves flex. Fuck. She shouldn’t like that. That’s disgusting. She can’t believe Shauna just spat on her pussy like that. “You fucking freak,” she says.
“Just making sure you’re wet enough,” Shauna says, grinning up at her like a fucking asshole.
Mari opens her mouth to say something, but then Shauna leans forward and drags her tongue through Mari’s folds, and Mari can’t help but melt. She goes boneless as Shauna works her way up to Mari’s clit, lapping at it in rough little flicks that have Mari bucking her hips. She can’t tell if she wants to squirm away or fuck herself harder against Shauna’s mouth.
It doesn’t matter.
Shauna presses her face deeper into Mari’s pussy, sucking at Mari’s clit hard and fast.
Lightning shoots from Mari’s clit outward, down to her toes, down to her fingers, straight to her staticky brain, and it’s building rapidly, the coil tightening, and Mari is so stupid happy as that too much feeling starts to pulse like it’s about to burst that she hears herself chanting Shauna’s name. She sounds so broken and needy and close.
The feeling vanishes again, leaving Mari hiccuping and sobbing because she can’t believe Shauna fucking hates her. Her pussy aches from being edged, her bladder is really, really full, and that’s just making her cunt hurt even more.
After Mari’s twitched and squirmed like that could ever be enough to get her over the edge, Shauna has the audacity to hock another glob of spit directly onto Mari’s pussy.
Mari’s thighs lock up at the feeling, trying to pull an orgasm out of it against her will.
Shauna gives her another moment of desperation, one last not-enough spike of pleasure before she rubs the spit in with Mari’s slick like Mari is supposed to be able to do anything but try to clamp her legs shut at that.
She’s gonna fucking piss herself if Shauna does this again. She can’t hold it. She needs to get up or she’ll wet herself, and Shauna will never let her live that down. Even as wasted as she is, she knows that.
“Whose cock are you gonna cum all over?” Shauna is getting up onto her feet, rubbing her slick and spit-smeared hand up and down the length of her cock.
Mari is gasping and sobbing—she doesn’t remember ever being this incoherent before as Shauna helps her to her shaky legs.
Shauna keeps Mari’s hands in hers as she swaps places with her, sitting down on the edge of the top and tugging Mari between her knees. She guides Mari’s legs over the edge of the tub, tugs her into straddling Shauna’s lap, and lines her cock up with the entrance of Mari’s pussy, as she notches the head right there in Mari’s opening.
“I asked whose cock are you gonna cum all over, bitch,” Shauna says, her hips pushing up enough to stretch the lips of Mari’s pussy out around the head of her cock. She pulls back just as Mari adjusts to the feeling in her oversensitive cunt, and it shouldn’t devastate Mari as badly as it does.
“My sister’s,” she says, trying to press her hips down, to get Shauna’s cock back inside.
Shauna lets her, the head of her cock pushing into Mari’s cervix as she bottoms out.
Mari sees stars and cartoon birds. There’s the throb of her bladder, the dribble of piss that she feels leak out of her before she can clench her body into a fist and stop herself from totally fucking wetting herself. She falls limp over Shauna, slumping down onto her step-sister’s shoulders with her arms feeling like Jell-O as they dangle down Shauna’s back and Shauna’s hands take hold of Mari’s hips. Mari can’t even try to grind herself down as Shauna bounces her like a rag doll. Each stroke sends Shauna’s cock ramming back into Mari’s cervix so hard her bladder throbs, just off of the rhythm of Shauna’s pulse buried deep in her cunt. She’s slack-jawed and panting with pressure building in her stomach all over again, harder and sharper than ever before.
She can feel herself soundlessly mouthing Shauna’s name as her orgasm starts to twitch inside her, threatening to shatter her. But Shauna’s going to stop again, going to edge her until she screams and wakes their mom up—and even if Shauna doesn’t, Mari’s going to wet herself all over Shauna’s cock, and it’s going to be so humiliating and she shouldn’t want that. She’s such a pathetic fucking slut, clenching down on Shauna’s cock at the idea of pissing herself.
There’s a knock at the door. “Mari? Shauna? Are you girls okay in there?” Shauna’s mom says, sounding as concerned as she did when she told Mari that if anything was ever wrong, Mari could come to her, even if it was about Shauna because she’s Mari’s mom too now, if Mari wants her to be.
Shauna curses under her breath and slows the rocking of Mari’s hip down, prolonging the burning in Mari’s stomach as the start of her orgasm starts to flicker. “Yeah, Mom. Mari’s just a little nauseous.”
There’s a pause. A moment of silence where the flicker starts to fizzle and hurt, and Shauna’s grip is loose enough that Mari can propel herself up and stumble out of the tub, yanking her pussy off of Shauna’s cock.
She’s trying to pivot to slump down onto the stupid fucking toilet seat when her pussy convulses, and something in her snaps. Piss gushes down her thighs and onto the floor, burning through her tender cunt painfully. Her knees tremble before they buckle and she lands on the seat, correcting the course of her piss from her fucking feet to the toilet bowl. Her face burns as she groans in pain, her calves flexing so hard they cramp. She doesn’t think she’s ever felt worse as her stream of piss finally comes to an end, her pussy still clenched around nothing.
“Mari? Sweetie, are you okay?” Shauna’s mom says.
“I’m okay,” she says. Her voice sounds rough. It feels like sandpaper in her throat. She’s got full-body tremors. Her wet thighs are the worst of all.
Shauna is staring at her slack-jawed. She’s never looked so awed before.
Distantly, it reminds Mari of how her abuela used to look at that picture of the Pope on their mantle before they left the house. Her pussy flutters painfully. She winces.
“… Okay. Let me know if you need anything. Try to get some sleep, girls,” Shauna’s mom says. Her footsteps get farther and farther away sounding.
For a long moment, the only noise in the room is Shauna and Mari’s ragged breathing.
The footsteps round the corner, and Mari finally whines, high and pained. “It hurts,” she says. The puddle of her piss is still hot under her feet. “I didn’t mean to—”
“You’re so sexy, Mari,” Shauna says breathlessly.
Mari squirms in her seat, shaking her head violently at the piss dripping off of her trimmed pubes. She has all the sensitivity of an orgasm and none of the pleasure. “Shauna, I need—” Her breath hitches. She doesn’t know what she needs. “Make it stop.”
Shauna pets down Mari’s arms, hushing her gently. “You’ve never had a ruined orgasm before, have you?” Shauna knows Mari hasn’t, knows Mari doesn’t even know what that means, but Mari’s too tired to whine about that.
She shakes her head again, tasting the salt of her tears as her mouth twitches in an effort to find words.
“Oh, you poor thing.” Shauna presses a kiss to the crown of her head. “I’ll clean you up, honey. You shouldn’t have pulled off my cock. I was gonna let you cum that time.”
Mari just trembles. “N—no. I was gonna pee.”
Shauna pushes a strand of her hair behind her ear. “Mar, you did piss yourself.” It’s the same tone of voice she adopts whenever Mari asks something Shauna thinks she should know the answer to.
It makes her flinch. “I didn’t mean to—I was gonna—on your—” She can’t say it. She just shakes her head some more, tugging Shauna closer.
“You were gonna be such a good girl for me. Instead, you hurt yourself like the dumb bitch you are.” Shauna tilts her head up for a chaste kiss. It’s so condescending.
Mari’s pussy throbs painfully. She can’t help but whimper.
It’s Memorial Day weekend, and they’re touring college campuses with Mari’s dad since Mother’s Day is still that kind of weird verging on painful for Mari, and Shauna’s mom could never get three days off at the hospital, and Mari’s stupid little brothers, Alex and Mat, cheered at the idea of not having to see their sisters for a whole weekend. Mari is sitting in the backseat because Shauna always gets mad when Mari can change the radio station and pick what tapes they listen to. She’s got her legs crossed when she becomes aware of the faint pressure of her bladder.
Shit. She’s not sure how much longer the drive to Cape May (so they can take two ferries to get to Rhode Island for Shauna to tour Brown behind Jackie’s back, but that’s not Mari’s problem) is, but she’d wager it’s at least another hour. They’re already running a little late because a spider freaked Mari out when they were leaving for New Brunswick to tour Rutgers, and they had to calm her down after it was taken care of, so she doesn’t think her dad will pull over for her to go before they reach the next rest stop.
She still sighs and leans her head against the window.
“What’s wrong, Mars bar?” her dad says, glancing at her through the rear-view mirror.
Next to him, Shauna slows her journaling and tenses like she might be concerned.
It’s stupid sweet. As much as Shauna loves to abuse Mari’s pussy, she always gets so concerned and protective whenever she thinks something is actually wrong. It’s like she likes Mari or something. The thought has her twirling her hair.
“Nothing. I just kinda have to, y’know, use the ladies’ room,” she says. She squeezes her thighs a little reflexively.
Her dad sighs. “Why didn’t you go at Wawa?”
Mari’s shoulders hunch up defensively. “Sorry, Papi. I didn’t have to go then. It’s fine. I can hold it.”
That’s the wrong thing to say, judging from the way Shauna’s head turns just enough to catch Mari’s eye and her lips curl into her stupid smug little smile.
“Okay. If you say so,” her dad says.
“Don’t worry, Ricky. Mari’s a big girl. She won’t have an accident,” Shauna says, turning the page in her journal and scrawling furiously. It’s not technically weird. Shauna’s been journaling for, like, the entire road trip so far—minus when she’s giving Mari’s dad directions. But Mari’s stomach drops. Whatever Shauna’s writing now, it’s nothing like what she’s been writing since they woke up.
Mari forces herself to relax as she uncrosses her legs. There’s nothing Shauna can do to her in the car, not with her dad right there. Sure, he might not suspect anything, but Shauna’s not a complete psycho pervert. She won’t try to make Mari piss herself in the car like some kind of animal.
She can hear Shauna tearing a page out of her journal, but she’s not going to look up and acknowledge that. Whatever this game is, Mari’s not playing ball. She’s not interested.
Shauna clears her throat, and Mari can see that her arm is reaching out to Mari, offering a folded note.
And, like, Mari should reject it. She shouldn’t indulge whatever this is. But she’s curious—and if she totally ignores Shauna, her dad will ask if they’re fighting or something. So… she takes the note and unfolds it to read.
It says: “Are you gonna be a good little slut and let me make you piss yourself this time?”
Against her will, Mari feels her pulse drop to her pussy. She crumples the note up and shoves it into the trash bag in the backseat.
Shauna scowls at her. Then she’s writing another note, tearing it out, and shoving it against Mari’s knee. When Mari’s leg twitches at the touch, Shauna’s gaze drops like she’s trying to see up Mari’s skirt.
Mari scowls back as she accepts it, but she still shifts her legs open enough that Shauna can see her panties, a white cotton pair with a flirty pink bow on the front and “princess” written in matching cursive on the ass. She tries not to smile when Shauna’s breath hitches at the sight. She’s not playing whatever game this is. She’s just, like, being nice or something. Shauna gets sulky if she goes too long without perving on Mari, so really she’s a good samaritan for this.
This note says: “I might not have the strap, but I have a fist, Mar. Watch your attitude if you want me to use lube.”
She feels faint at the prospect. She’s never considered it, but she’s always begging Shauna for more, even when Shauna’s got three fingers stretching her cunt out. Can she take that kind of stretch? If Shauna can fit her whole fist in Mari’s pussy, will it make her a slut?
Well, an even bigger slut.
Mari knows she’s already Shauna’s slut. She’d have to be stupid to not know.
“Are there any rest stops coming up?” she says.
“Is it an emergency? We’re already running late,” her dad says.
“I can hold it! I totally can.”
He eyes her warily. “Shauna, can you check the map for a—”
“No, no, really. I’m fine. Shauna, put the map away.” She doesn’t want to make Shauna think she really can’t hold. Even if that means when they do stop, she really will have to piss. Maybe that’ll even be better.
Somehow.
“I’m gonna check,” Shauna says, sounding somewhere between condescending and smug which Mari’s dad completely misses.
She folds the note back up neatly, and she shoves it into the trash bag too. She smiles brightly at Shauna as she does it, batting her eyes innocently. She’s not playing. She’s so not playing, and Shauna can’t make her.
And she doesn’t want to. Her pussy is dry, and her panties are dry, and she doesn’t even have to pee that badly, and she can keep her legs closed when Shauna gets her alone. This road trip is going to be fine. She can have normal sex with her step-sister behind her dad’s back while figuring out which campuses she could see herself spending four years at.
Mari fixes her gaze back on the trails of cars along the Garden State Parkway, and she tries to think about literally anything but the idea of Shauna forcing her fist inside of Mari’s cunt. She can’t even imagine what it would feel like to be that full. Not that she’s trying to.
Shauna is scribbling away furiously, but Mari is determined to ignore that.
She’s supposed to help Laura Lee study for physics class when she gets home. Laura Lee is struggling with the electromagnetics unit, and despite how much she talks in class, Mari just sort of gets this stuff—even if Tai scoffed that she would be a way better tutor when Laura Lee asked Mari for help. What else does Mari have to do when they get home? Take Alex, Mat, and Javi to see the new Die Hard, hound Travis for the $5 he’ll owe her for Javi’s ticket even though he’ll tell her that’s a stupid amount of money to be mad about, personally thank everyone in her family for their birthday gifts, find a way to make sure Lottie hosts the next rager since it was so hard to get the vomit out of her parents’ bedroom after her birthday party, convince Shauna to help her with her paper on The Crucible…
The last time Mari asked Shauna for help with her English homework, Shauna said Mari had to earn it. Absent-mindedly, she rubs her thighs together at the memory. If she closes her eyes, she can still feel the fucking serial killer style rope binding her wrists and ankles. She’s not sure where Shauna learned to tie knots like that (she wasn’t exactly a Girl Scout), but Jesus fucking Christ—it was so impossibly hot to be helpless to pull away or fight back while Shauna basically mauled her pussy.
Fuck. Shauna will probably make Mari piss herself in exchange for essay help this time. She should ask Taissa instead. Or even Lottie; she’s more of a history buff, but she’s way better at this shit than Mari is.
But… won’t Shauna get mad if she asks someone else? And if Mari lets Shauna do it properly once, maybe that’ll be the end of things. It’s not like Shauna’s tied her up again since the first time.
Then again, the ropes had been a total shock. Shauna’s been obsessed with trying to make Mari wet herself since she first showed Mari the strap like the freak she is.
Shauna is nudging Mari’s bare knee again with another stupid note.
Mari sticks her tongue out and snatches it from Shauna’s hand.
“You girls and your inside jokes, huh?” Mari’s dad says.
Yes, their inside jokes about how Shauna is going to do things to Mari’s pussy that Mari hasn’t even seen in pornos her and Van have watched together in Van’s basement.
Shauna flashes a tight smile to Mari’s dad. “Just dumb soccer stuff.”
Dumb soccer stuff in the forms of threatening notes that say: “Cute panties, Mar. They’ll look even cuter stained yellow. How’s holding it going? I forgot to tell Dad that was the exit for the next rest stop. What’d you drink again, half my water bottle and a Slurpee? You looked so fucking pathetic pissing yourself the other night like the dumb slut you are.”
She can’t help but squirm in her seat. Her bladder throbs. She presses her thighs together tightly to try to help, but it just makes it worse as her panties start to stick to her pussy lips. Her nipples are stiff, and her clit feels swollen.
Desperately, Mari pushes a hand between her thighs. Her dad can’t see her back here, but Shauna is staring at her through the rear-view mirror, smirking as Mari palms her cunt. She’s not trying to get off. She swears. It just used to help when she was little, and she had to hold it.
But the heel of her palm is pressing into her swollen clit too hard. Even with the cotton of her panties diluting the pressure, she has to bite down on her lip to keep herself quiet.
“Wait, that was the exit for the rest stop,” Shauna says, frowning like she’s not fucking thrilled.
“Damn,” Mari’s dad says.
“We’re still on track to get to the ferry terminal on time. Sorry, Mar. Can you still hold it?” Shauna turns her head to face Mari. She’s got that faux concerned look she gets when she tortures Mari in public.
Mari swallows the urge to slap/kiss Shauna. She can’t tell which one would’ve won out—maybe she should do both. Would Shauna like that, or would she fuck Mari brainless for it? Jesus Christ, she doesn’t need to think about Shauna fucking her from behind right now.
“I could pull over on the shoulder if you really need to go,” her dad says.
“No! No, I don’t—that’s gross, Papi. I can hold it.” Mari’s face is on fire. Maybe she should take her dad up on the offer, but then Shauna will just watch her piss into a water bottle or something equally disgusting and win anyway.
“You’re not going to have an accident like when we went to Disney World?”
She’s never wanted to die more. “Oh, my God! I was seven! Don’t embarrass me!”
Shauna grins at Mari, and Mari reflexively squeezes her pussy tighter between her legs. Her thighs lock up around her wrist, and she’s getting dangerously close to that tender, too much feeling that she can never push through to her own orgasms.
This isn’t helping. Mari pulls her hand back from her pussy, her fingers curling forward enough to brush her entrance in a way that turns her thoughts to static. Is she imagining the pressure in her bladder straining against something in her cunt that she wants Shauna’s mouth on?
Her hips twitch uselessly.
She closes her eyes to think dry thoughts. Nevada. Those nasty fruits astronauts eat. Her stupid knees if she doesn’t moisturize enough after showering. She’s not going to piss herself. And even if she does, it’s not going to be with Shauna inside her. She won’t give her step-sister the satisfaction.
Shauna fiddles with the radio until she lands on a station playing “Water Runs Dry” by Boyz II Men like some kind of fucking monster.
Mari refuses to open her eyes. She tries to tell time through how many songs have played. She’s too stubborn to actually ask how much longer until they’re there, so it’s not very useful, but it’s something to think about other than how she feels like she’s going to piss herself.
“This is our exit,” Shauna says. “We can stop at the Wawa right by the terminal.”
“Got it. Mari, thank your sister.”
Shauna really shouldn’t be thanked right now, but Mari plays nice anyway. It’s not like her dad would ever dream up what any of Shauna’s menacing notes say. “Thank you, Shauna.” She’s almost safe. She just has to make it to the bathroom without Shauna finding a way to strong-arm her into a stall together or anything weird.
She finally opens her eyes as the car turns into the parking lot, unbuckling frantically once it rolls to a stop. She’s yanking her hand out from between her legs and pushing the door open before her dad’s even got the keys out of the ignition, but she doesn’t give a shit about that as she hops out and—fuck. A little bit just fucking leaked out of her pussy. Like her panties aren’t wet enough. Like Shauna hasn’t humiliated her enough.
Mari sprints at top speed into the Wawa and makes a beeline for the restroom, as scared to chance Shauna somehow fucking smelling her piss as she is that the rest will gush out of her if she waits a second longer. She’s so fucking lucky. There’s one woman waiting ahead of her, but two stalls open up seconds apart after she stumbles to a—well, not quite a stop since she’s squirming like Shauna’s dragged one too many orgasms out of her but still won’t let her off the hook. Her cunt clenches just a little too much, soaking another tiny stream of piss into her panties.
She thinks about Shauna wanting to see her panties stained yellow as she hurries into the stall. There’s a second where she’s frozen, remembering the last time she didn’t lock the stall behind her, when Shauna burst in and took her panties.
She slides the lock into place as her pussy throbs, and she knows that was a mistake. She barely has time to tug her skirt up as she sits down on the seat and pisses through her fucking panties. She’s never felt more pathetic in her life, and it’s all Shauna’s fault.
A year ago, Mari had too much dignity to do shit like this.
But a year ago, Mari had never had an orgasm. Now, she can’t help but see stars. She’ll have to take her panties off. There’s no way she can wear these in her dad’s car. Shauna’s gonna want them like she always does when she ruins Mari’s panties.
It’s fucking obscene.
Once she’s done, Mari sits there for a long moment and pants. She can’t believe Shauna’s gonna fist her tonight. She can’t believe that makes her giggle.
“Everything okay in there, Mar?” Of course Shauna’s perverted ass followed her in here.
“Mhm.” Mari breaks off toilet paper, and she hesitates. Should she wipe herself through her panties? Should she take them off first and give them to Shauna as is, dripping wet? The thought makes her blush. She’s seriously contemplating how best to gift her step-sister her piss-soaked panties.
… Dripping is way too much. Shauna’s never gonna leave her alone if she does that.
Not that she wants that. Not totally at least.
Mari’s breath hitches as she drags the wadded up toilet paper along her pussy. She rubs a little harder and a little longer than she needs to. Her toes curl in her shoes at the feeling.
She peels her panties off from under her skirt, hoping Shauna is watching through the open space under the stall door. God, this is so gross. She scrunches her nose up and tries to think about how she’s going to do this. There are other people in the bathroom, after all. God-fucking-forbid someone else sees Mari hand off her wet panties to Shauna.
Her brain feels hazy. She’s not sure she has anything to hide them in other than her fist… It’s seriously disgusting. Shauna is so lucky Mari likes her too. And that there’s a sink for her to wash her hands in after this. Ew.
So maybe Mari is smiling just a little when she opens the stall door and sees Shauna waiting for her. It’s just a little sexy how freakishly into her body Shauna is.
Wherever Mari is, it’s warm. At first, she’s not sure what exactly is disturbing her sleep as her heavy eyes start to flutter, something crescendoing in her belly. She’s always been a deep sleeper, always an easy target for pranks at sleepovers. Her senses come back to her so slowly when she’s waking up that it annoys Shauna in the morning when she oversleeps. Is she on her stomach? She needs to stop passing out on her stomach. Wait, when did she even pass out? When did she even get home? Is she home?
There was a party. She thinks. Her head doesn’t hurt, but she thinks she can taste that gross beer Jeff always supplies. And—and she really fucking needs to pee. That’s what’s waking her up.
… But that’s not the only pressure inside her.
There’s all these soft grunting noises above her, and her body is limp but not still, and her pussy feels full—someone is raping her. She fell asleep at Randy Walsh’s party, and someone is raping her, and it feels so good she wants to cry, and it feels like the floor just dropped out from under her, and what fucking asshole is raping her?
Mari squirms on her belly, trying to pull her cunt off of her fucking rapist’s too big cock as she hyperventilates. Her eyes are finally open. She can see the bed’s headboard and the white wall behind it as her rapist yanks her hips back down to meet his thrust, the head of his cock ramming into her cervix so hard she yelps and instinctively grinds down to chase the feeling. Her bladder throbs painfully.
She sobs, open and pathetic and terrified.
This is her own fucking fault. She got too drunk, and she must have ditched Shauna, and now someone is raping her.
Shame courses through her as the squelching noises coming from her pussy get louder. Mari buries her face in the pillow. Her shoulders tremble as she cries.
“Stop fucking crying, Mari.” A wave of relief washes over Mari, her hips relaxing now.
“Sha—Shauna?” she says, letting herself smile hopefully.
“Who else would be fucking you, dumbass? You think I’d let someone else be inside you?” Shauna’s hips speed up. She wraps her arms around Mari’s waist and presses hot, damp kisses along Mari’s bare shoulders and neck. “This cunt is mine. You belong to me. No one else gets to fuck you.”
Fuck, Mari really needs to pee, but Shauna is fucking her so roughly, and it feels so, so good, and she’s so relieved that it’s her sister, not some rapist. Her hips snap back to meet Shauna’s as she gasps and moans every time Shauna hits her cervix again.
It’s better than her g-spot, it’s better than Shauna rubbing her clit—and it really, really makes her bladder throb so badly. It almost feels like when she’s going to squirt all over Shauna’s dick or fingers, but she knows it’s not.
“Shauna, I need—oh, fuck—I need—right there, right there—” She can’t stop whimpering and angling her hips to take it even deeper.
“Yeah, Mar, I get it. You need my cock, you dumb slut,” Shauna says.
Mari shakes her head frantically as the pressure threatens to snap. She’s gonna fucking piss herself, and she can barely speak. She feels so fucking good. She’s so happy Shauna woke her up with her cock. She’s clawing at the sheets as Shauna pounds into her. “I—fuck, fuck, fuck—need to—oh, God—Shauna, I love you so much—God—I wish you could knock me up.”
It’s not what she means to say, but it’s not the first time she’s thought about it either. Her body is on fucking fire as Shauna jack-hammers even harder into her cunt at that. She clenches desperately around Shauna like maybe she can take her step-sister even deeper.
“Take it, you fucking slut,” Shauna says, yanking a fistful of Mari’s hair back as she bruises Mari’s tender insides.
There’s a frantic, terrifying second where Mari thinks that she can still tell Shauna she woke up because she needs to pee, where she forgets that Shauna probably won’t let her even if she can force the words out of her mouth. She opens her mouth to try to say something, anything. And then the second is over, and Mari can hear her voice go higher than she knew it could as the coil in her stomach bursts, and her whole body locks up and zeroes in on the head of Shauna’s cock against her cervix, and her inner thighs and the bedding beneath her and Shauna’s cock are all soaked in her hot, gushing piss.
“I love you,” she thinks she’s saying again in-between whines and whimpers and moans. But she’s not sure she says it, and—and holy shit, she’s still cumming.
It feels like it lasts forever. She’s never cum this fucking hard before, not even when Shauna makes her squirt.
Shauna doesn’t stop pumping into her roughly, forcing more and more piss out of her, trickling down her legs and making her sob all over again. “That’s it, bitch. Let your sister fuck you through it. You look so fucking pathetic, pissing yourself all over my cock.”
Mari sobs softly into the pillow. It’s damp from her drool and tears, but she knows it’s not anywhere near as bad as where she just fucking wet herself. Her whole body trembles as Shauna keeps pounding her tender pussy.
Her brain feels foggy and sluggish. It’s so, so hard to not let herself go limp, but she doesn’t want to fall onto the piss-stained bedding.
Shauna slows her hips down until she’s just nudging her cock in and out of Mari.
They’re both panting.
“… I’ve got you, Mari. You can relax. I’m not gonna let you lie in your own piss,” Shauna says, sounding oddly soft.
And… Mari said she loves Shauna, didn’t she?
She blinks dazedly as her body goes limp into Shauna’s arms. It doesn’t feel wrong at all. She loves Shauna. She loves her step-sister, the huge pervert who just made Mari piss herself after fucking her awake. The huge pervert who remembered that Mari thought it might be kind of hot to wake up like that even though Mari’s pretty sure she only said that once while drunk when they watched Sleeping Beauty when Shauna got her sick.
Mari can’t help but smile as Shauna lifts her upright and scoots them both away from the puddle on what seems to at least be Shauna’s bed. It’s all so weirdly gentle for what Shauna just did to her pussy. She giggles when Shauna eases her cock out of Mari with another gross squelching sound.
“I love you, Shauna.”
Shauna tenses up behind Mari, and Mari panics. Was that the wrong thing to say? Does Shauna not want Mari to love her? Does she not love Mari back?
But Shauna’s hold on Mari’s waist tightens. She nuzzles her face into the space where Mari’s neck and shoulder meet. “I love you too, Mari.”
Mari squirms in Shauna’s lap. She’s too happy to even care that she’s dragging her sopping pussy all over Shauna’s thighs. If Shauna doesn’t want Mari’s piss on her, then she needs to stop trying to make Mari wet herself. That’s so not Mari’s fault.
One of Shauna’s hands drops between Mari’s legs and palms her whole cunt. “God, you feel so good.”
“You’re so fucking gross, Shipman,” Still, she sighs and presses her hips forward, letting Shauna squeeze her even though it’s embarrassing.
“You like it,” Shauna says with a scoff. Her thumb presses into Mari’s clit.
Mari flexes her thighs and tries not to squirm even though she’s tender. “I—I love it. But, um… Can we take a shower?”
“Yeah… you’ve been a good girl today, Mar.”
Mari can’t tell if it’s her bladder or her clit that throbs at the praise. It’s not like it matters, though.