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To say that it's Mitsuki's fault is a reach. They both know what they want and exploiting a silly family tradition doesn't seem too bad.
"Boys, don't move!" she says with a proud grin on her face. Both of them are puzzled by her giggly reaction until she points upwards. There's a motherfucking mistletoe on the ceiling from where they stand. Her mother holds up her camera and gestures to them to get a bit closer. "Guess I'm gonna see some sweet loving action from both of you!"
Katsuki vehemently scoffs, ignoring the way his face heats up. "No fucking way! I'm outta here!"
Before he can barely take a step away, a strong arm is already gripping his waist. Fuck. It's so hard not to squirm when he is reminded of how he manhandled him last night. Masaru leans at him to whisper, " Oh c'mon, Katsuki. Not even a kiss on the cheek for your dear father?"
Feigning innocence while flirting is one thing they get good at. Yeah, he knows his old man is flirting with him by the way he doesn't even steal a glance to look at his wife's reaction. Katsuki is everything he sees right now. Gods, now he wants to tear off the smile from his face and kiss him on his lips. But nope. Katsuki doesn't want to have an accident in front of his mother and come in his pants. Terrified, he pulls down his holiday sweater to hide his growing chub.
"Sweetie, show your father some love!" Katsuki looks at her ignorant mother. Oh he will. He will give him not just childish kisses on the cheek. He'll let him ravish his mouth like his Daddy always does. With a sigh, he lets out a gruff "Fine!" and quickly pecks Masaru's cheek. He hears the flash of the camera capturing the moment.
"Thank you, love," is his only reply that almost makes Katsuki let out a tiny whimper. Fuck. He doesn't expect to be so riled up. Is it because of the season? Or is it because he wants to show it to her face that she's not the only one who can satisfy his husband. In fact, Katsuki is better than her mother in that department.
Their family Christmas celebration ends after that. But not for Masaru and Katsuki.
When Mitsuki bids them goodbye to shower, his father immediately pulls him for a deep kiss. The living room is still filled with lights on, making the moment more romantic than ever. This isn't like those times they make love in the dark, behind closed doors of his bedroom. Katsuki swears his heart thrums loudly with love. Shit. It's crazy how much he longs for this man, how much he craves for him at every second. He's so stupid to think it's just a phase when he can feel his forbidden love blooming for him every single day.
"Daddy," he manages to mutter between their wild kisses but Masaru only pulls their bodies closer. Holy shit. Katsuki feels his hard-on, grinding slowly against him. Instinctively, he spreads his legs wider and a low whine has been ripped out of his throat. "Daddy, fuck me. I've been good, I prepped already for this. Fuck. Just put it in me already. Please!"
"You want it so bad, baby? You look so pretty blushing for me a while ago.." he smirks, licking up Katsuki's neck that makes him gasp loudly while he swiftly pulls down his sweatpants. "My baby boy is so shy to kiss his Daddy on the cheek but isn't afraid to beg for his cock."
Katsuki feels heat pooling in his guts. He can't hide how he gets aroused by that. It's Daddy's fault for making him such a whore. The boy doesn't notice he's been thinking out loud until Masaru responds haughtily, "No, baby. You're just born for it. Made to take cum and beg for dicks." With ease, he pulls out the red plug he has been wearing for hours. The dirty popping sound makes Katsuki dizzy with desire.
Pressing his small frame up against the wall, Masaru litters his neck with kisses and bites as he lines his throbbing erection. He collects more of their precum and smears it on his thickness to let it slide into him easily. Katsuki can't help but whimper needily. The beautiful flush down to his neck makes him more irresistible, so delicious to taste and devour. He sees his father staring at him softly, leering at his own son growing incredibly hot by his touch. The dimmed lights turn his dilated hazel eyes and reddened cheeks more apparent. He's so handsome. And his body just perfectly embraces every inch of him. His eyes flutter with aching heat and without hesitation, Katsuki brings their lips closer.
The first thrust gets Katsuki hissing. No matter how many times he takes him, he always feels full. The grown man slowly rocks his hips, the fat head of his veiny cock breaching towards his puffy rim. He continues on languidly exploring his Daddy's mouth, leaving bites on his lip and skillfully lapping his tongue. He knows every inch that stirs him the better way. Masaru's hand snakes under his sweater and Katsuki involuntarily grinds when he pinches his sensitive nipples. Oh fuck.
"Daddy, Daddy, more..." he mumbles in a daze. Luckily for him, his father is just as horny. Katsuki excitingly wraps his legs around him, which produces a soft groan from the man. He's been looking forward to this all night. Removing all slack and care, Masaru roughly pushes into his lubed hole. Fast and uncoordinated, just like Katsuki wanted.
He might as well scream out loud in pleasure for this unholy gift.
"Yes, fuck me, Daddy. You're hitting me so good. Oh shit, shit. Fuck!" he lets out sharp gasps, body bouncing by how hard he is fucking him on the wall. The old hag takes too long in the shower and Katsuki wishes she won't question all the faint banging sounds she probably hears from where she is.
He doesn't even notice that he has his eyes closed by how good he's feeling. His cock brushes his prostate with it's rhythmic thrusts. He never misses it and it's driving him wild. Masaru has to teasingly bite his chin so he can take a glimpse. He heavily pants, cold breaths leaving out of his mouth in puffs and he's insanely high up in the clouds. He feels the fucking best. It's always a wonder how his father dresses up so simply and acts lame when he's totally the opposite. The man is a motherfucking beast in bed that doms the shit out of him.
Rationality has slowly been fading on him and he's loudly mumbling streams of moans, of pleas and calling for more of his Daddy.
"Fuck. Fuck, you're so hot, baby."
Feeling more feverish than ever, Katsuki clenches his hole with the thought of his Daddy filling him up. Masaru groans against his ear that makes him squirm, tightening his wobbly legs around his father's waist. "So tight, baby. You feel so much better than your mother's pussy. Damn me if I wanted to breed your tight ass for hours."
Katsuki mewls. Holy fuck. Will his wish be granted at this moment? His hole squeezes his cock like it doesn't want to let go. He wants to milk his cock for hours, his cum belonging to him. He's the only one who can turn his Daddy like this. So perverted and sick. Masaru gets the hint and intentionally thrusts up deeper. Katsuki doesn't expect the loud moan he's let out, the noise echoing through the whole room. The firm grip of his father against him tightens.
"You love that, don't you? Being Daddy's breeding toy."
"Yes," he shivers at the thought. There's no use denying when his body writhes at every chance. "Yes, fucking—holy fuck, want it so bad, Daddy!"
"Your dick has no use for now." Masaru grips his aching length. He soon realizes that he's been leaking precum all over, even dirtying their clothes. He's fucking depraved to the core. The poor boy lets out a tiny shriek, thrashing on his arms. Instead of loosening his hold, Masaru only watches him with a sinister grin, cock throbbing inside him. Fuck. He gets bigger just by seeing him get wrecked. Katsuki's mouth curls and trembles in twisted delight. "You only get to cum when you have a cock up in your ass. When Daddy's praising you for how much of a cockslut you are. Whenever and wherever I say."
"Yes, Daddy. Oh fuck, I need it, need your fat cock! Need it to cum!"
Masaru groans, lets go of his pathetic dick and his pace gets ruthless. The wall feels like it's going to burst with how fast and hard he is drilling him against it. There are tears in his eyes but he doesn't care. They've been making a lot of filthy noises but he doesn't care. Katsuki no longer cares about anything else when he has a cock inside him. He loves every second of being pounded. Of having his father's cock in and out of his dripping hole.
"Look at you acting so lewd. Like I didn't just fuck you last night at the bathroom. Tell me, what should I call you?"
Katsuki gulps. "A c-cockslut! D-Daddy's cockslut!"
"Fuck, that's right. I made you, Katsuki." Masaru pants, hand nibbling at his swollen peaks and he watches his son sinfully throwing his head back. "This cock fucking you made you. So it's only fair that I get to own you, right?"
"Yes! All of me belongs to Daddy. Need you Daddy, please. Please!"
Sweat trickles on his forehead. This is far better than all the training exercises he's done. His heart beats so fast, and it doesn't help that his dick leaks more like a broken hose with the friction between their bodies. He mustn't feel this good while thinking just how right this is. A father and son making love. Isn't family the core of the holidays? Katsuki can't think of a much better way to show love other than fucking each other's brains out. His Daddy just happens to be a goddamn pro in that area. Katsuki keeps his eyes shut while his father abuses his prostate.
He feels it. He's getting close. Katsuki's moans get more broken, more desperate as he meets his Daddy's thrusts.
"Daddy, I'm gonna cum! I'm gonna cum so hard!" Katsuki bites his lip and tugs his father's hair. His body shakes tremendously as the onslaught of orgasm racks out of him. He squeals, white hot juices pouring but Masaru keeps his assault. He fucks him through it that makes him wail in overstimulation. "Oh shit! Oh f-fuck, fuck! Fuck!"
"Katsuki, yes, gonna cum inside you, gonna put my seed in your belly," he buries his face on the side of his neck and bites down hard. The muffled moan he lets out coarse through his senses with vibrations that add up to the overwhelming pleasure.
"Do it, Daddy. Breed me, breed your baby boy.." he whimpers. With his plea, he feels the waves of hot cum spilling inside him. Katsuki sighs, body spasming and he nips his lip as he comes for the second time. Holy shit.
"That's it, sweetie. Take it all."
Masaru doesn't pull out after that and Katsuki milks him through it, both riding the last bits of their release. He feels so fucking sticky, clothes ruined and hugging with sweat but he is smiling so wide.
He just had his first Christmas sex. The first of his many.