Chapter Text
Oliver was growing fast. Like, crazy fast. He was only two earth years old, but was both physically and mentally a teenager, approximately 15 years old. And it seems his Thraxan genes kicked in later than usual, considering he had just started his first heat.
At first, it was hot flashes and feeling more aroused than usual. Nothing too much. But the second day… it was rough. He was bed ridden, and not even masturbating helped. So, he went to his brother, Mark. As if he knew what to do…
Oliver stepped into Mark’s room, walking in on him where he lay in bed half naked reading one of his Seance Dog comics. Mark noticed his little brother in the doorway, closing his comic with a smile.
“Hey, Ollie. What’s up?” Mark pondered, finally noticing his brother’s flushed face and the fact he was sweating far much than he’d seen him after protecting the city from a villain. “Woah… you okay? You’re really red.”
Oliver shook his head in response, panting softly from the intense heat. “Mark… what’s happening to me? I feel weird… and really hot.” Oliver complained, walking over to Mark’s bed and crawling onto his older brother’s chest. Mark felt how sweaty and hot he was, suddenly having an idea of what troubled Oliver so much.
“Oh… I think I know what’s wrong.” Mark murmured, remembering a conversation about Thraxan heat cycles during his time on Thraxa. He tilted Oliver’s face up, wanting to make eye contact with his little brother. “You’re probably in heat. Which explains why you’re burning up.” He taunted, chuckling which gave him a pouty expression from Oliver.
“It isn’t funny,” Oliver grumbled, groaning in discomfort and burying his scalding hot face into Mark’s neck. He breathed in his older brother’s scent, the damp spot in his underwear growing. “Look, can you help me out? I’ll take care of any villains for you when I feel better. Pinky promise.” He twined his pinky finger with Mark’s longer one, sealing the deal
Mark was a little hesitant, especially since they were brothers. But he shrugged it off, just wanting to get it over with. “Alright, alright. I’ll help you. But you better not tell anyone.” Mark commanded, receiving a grateful nod from Oliver. He rolled over so his little brother was flat on his back, pinning Oliver down. “Legs up.”
Oliver obediently spread his legs up and out, letting Mark pull down his damp underwear that clung to his folds with a string of his juices. Mark still wasn’t used to the sight of Oliver’s wet cunt, despite seeing it multiple times when he was a baby.
“You’re soaked, Ollie. You really needed this, huh?” Mark teased, his hand teasing Oliver’s slick folds.
“Sh-Shut up… can you just help me already?” Oliver impatiently asked, a soft whine spilling out as Mark finally stopped teasing and slid a finger into Oliver’s slick cavern.
“You’re so tight, Oliver… and wetter here too. Did I do that?” Mark taunted, not expecting Oliver to do anything but moan as he curled his fingers to hit his little brother’s G-spot.
“Maybe you di—NNGH! Mark…!” Oliver admitted, his words cut off by the sensation of Mark hitting that bundle of nerves. Mark pumped his fingers in and out, curling them over and over every time he pushed them in so he could hear the adorable, needy sounds Oliver made.
“O-Oh, fuck… keep going…” Oliver whimpered, his legs clamping shut around Mark’s wrist as Mark rubbed his sensitive clit. Mark pried Oliver’s legs back open, chuckling at how desperate he was for pleasure.
“Language, little bro,” He teased, rubbing his clit harder and roughly hitting his G-spot at the same time. Mark leaned down, suckling and licking at Oliver’s collarbone, intending to overstimulate Oliver. Mark felt Oliver’s walls tighten around him, his little brother’s moans getting louder and higher in pitch. “Look who’s close. Barely even lasted two minutes, huh?”
“Shut up, Mark!” Oliver slurred, hips canting up for more of the friction.
Mark increased the pace of his pumping fingers and clit rubbing, sending Oliver over the edge. Oliver finally came, squirting all over Mark’s sheets and hand. Mark finally pulled his digits out of him with a wet sound, licking off Oliver’s sour, slightly metallic and sweet juices from his fingers.
“Mmm, you taste so good, Ollie… I might have to do this again soon.” Mark purred, reveling in his little brother’s flavor. Oliver’s face scrunched up, disgusted by how shameless Mark was, looking away as Mark casually licked off Oliver’s own arousal from his fingers like a weirdo.
“Y-You’re gross…” Oliver panted, legs trembling from the intensity of his first orgasm.
“Whatever you say, Ollie. C’mon, let’s clean up before mom gets back from work.” Mark picked up his brother, floating out of Mark’s room and into the bathroom. It was a good thing Debbie wasn’t home, she’d be livid. Mark started the bath, placing Oliver in and washing off the sweat and musk from his body. Once clean, he carried Oliver out the tub, drying him with a towel.
Mark floated back into his room, throwing Oliver over his shoulder as he changed the sheets, and gently setting his exhausted little brother onto the sheets. Mark joined him, ignoring the erection between his legs and making a mental note to “handle” it when Oliver came to his senses.
“So… how was that, Oliver? You liked it?” Mark asked almost tauntingly, knowing full well what the answer was.
“Yeah. It was… it was something, I guess,” Oliver mumbled, legs still trembling and numb. He craved more, but was too tired to go again. “Maybe we could do it again tomorrow.”
“How about tonight?” Mark offered.
“…Yeah.” Oliver agreed, nestling himself against Mark’s chest, clinging to him from the side like a baby. The two drifted off to sleep, already thinking of their next encounter.