Kinkuary Post (Kinktober day 19)
Fandom/Pairing: The Raven Cycle/ Mattvinsky
Words: 690
Prompt/CW: Creampie, First Time, Incest Kink, Breeding Kink, Anal Sex
A/N: This is one that I actually had get long enough to warrant being trimmed down, which makes me want to come back later and make it longer and more fucked up :)
Matthew assumes the position. Or, well, he assumes this is the position: face down, cheeked pressed the mattress, arms folded against the pillow under his chest, hips raised, back arched. If he’s wrong, Kavinsky doesn’t say much about it.
Kavinsky climbs behind Matthew and nudges his legs wide apart. “Damn. The way Lynch made you –” He puts a hand on the back of Matthew’s thigh and thumbs his cheeks apart. “Makes me wonder what he really wanted you for...”
Matthew blinks over his shoulder. He knows? That smirk says he does. Did he know before Matthew knew?
He pouts and presses his face back to the bed. “I don’t want to think about it.”
“Sure.” Both palms raise to the curve of Matthew’s ass. He kneads along the muscle in strong, firm presses. “That’s why you asked me, not him –” Aside, as he slips the pad of one thumb up against Matthew’s hole, “– bet he would’ve said yes, though.”
“I don’t –” Matthew cuts himself off with a low, whimpering noise as Kavinsky pushes the tip of his thumb inside. It burns, hurts, and gets worse as the rest of the digit forces its way inside.
“Fuuuuck.” It sounds heady, moan-like. There’s a noise like he licks his lips when he pulls his thumb out. “That’s fucking tight. I didn’t think you were for real…”
Of course he was for real. When would he have had a chance to do this? And with who?
Kavinsky slicks Matthew with spit and lube and works four fingers in to the knuckle, one at a time. When he can get them in all at once, he calls it good enough.He fumbles only a second with the corner of a condom, then drops the unopened square by Matthew’s head. There’s not much chance to think about it; not much chance to say anything. The slap of his cock against Matthew’s hole is a scant warning before he’s pressing in.
Matthew winces, body drawn taut – after all that, he’s still not ready.
“God damn,” Kavinsky hisses, pulling Matthew’s hips back to get the final inches of himself sheathed. “Relax, baby, fuck.”
“Hurts,” Matthew mumbles pitifully.
They wait and wait and wait until Matthew feels something inside himself give.
“That’s it.” Kavinsky starts to move, still too soon, but the stretch of him isn’t all pain anymore. “That’s it, that’s it.” He brushes his fingers through Matthew’s damp curls. “You’re taking me so good.” He thrusts harder, skin slapping softly against skin. “Knew you were built for this.” He keeps talking: praise and swears, off-comments about Matthew, about Ronan, about Ronan-and-Matthew.
Matthew’s measured breathing turns to pants and moans. His fingers curl into the mattress. He tries not to listen to Kavinsky, tries not to think of what his brother would think, or do, if he could see the way Matthew writhes. He almost manages it, until Kavinsky digs his fingers into the baby fat at the bottom of his stomach.
“How much do you think he knew about biology?” He leans forward to say it, burying himself inside Matthew and rocking against him as he goes on, “Think you’ll get pregnant?”
Matthew feels it then, the first thick, hot spurt of Kavinsky’s cum inside him; his breath catches.
Kavinsky moves again. His shallow thrusts spread the cum, lubing his cock and slicking the deep, desperate thrusts that follow. “That’s it, baby,” he grunts, that hand on Matthew’s stomach pressing hard. “You feel it? Gonna fill you up and send you home dripping.”
Matthew moans softly and lifts his hips. It’s timed wrong and instead of pulling him deeper, Kavinsky slips out.
“Look at you.”
Matthew can feel the slide of cum from his hole, the wetness of it between his cheeks as it spills warm and thick from inside. He twitches against the sudden emptiness and it pushes more out, enough to trail slippery and fast around the curve of his leg.
Kavinsky pulls his cheeks apart, watching him leak and sliding the tip of his cock up through the mess.
“Put –” Matthew pants, painfully hard when he reaches for himself. “Put it back in.”






