Slash Fiction/I’m not your brother: Wincest fic: Rated NC-17

Based loosely off the Slash Fiction 7x06 promo.

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Sam was standing at the sink washing dishes when the door slammed. He glanced over his shoulder, seeing Dean framed in the doorway. He heard the lock click. Sam looked back around and frowned at the soapy plate. Dean didn’t usually lock the door. But they weren’t really sure what they were dealing with in this job yet, maybe he was just taking precautions. It’s not like Dean talked to him anymore anyway.

“So, find anything new?’ He asked, rinsing off the last plate and his hands. ”Not really.” said Dean in a gravelly voice. Suddenly Dean’s arms wrapped around Sam’s middle. Sam started in surprise. “Dean?” Dean turned Sam around and pressed a hand into his chest. “Shh. I know we haven’t been on the best of terms. But no talking.” Dean pulled Sam down into a passionate kiss, his hands fisting in the front of Sam’s blue plaid button-up shirt. Sam, shocked, tried to push Dean away for a minute, gasping in surprise. “Dean..?” He gasped against Dean’s mouth, but his hands stopped pushing at Dean’s shoulders and clenched around them instead when his mouth opened and Dean slid his tongue inside Sam’s mouth, tongue stoking fires Sam hadn’t previously known was there. Sam groaned, tongues twining together. He could feel Dean moan in response against his mouth and press up against him, chests brushing, hips meeting, and Sam could feel Dean’s erection pressing against his burgeoning one. Dean’s hands grabbed Sam’s hips and pressed them back against the sink, grinding together roughly, his fingers twisted in Sam’s belt loops. Sam couldn’t help but raise one leg and pulls Dean even closer, the angle sinking Dean’s hips slightly between his thighs. His fingers moved to the back of Dean’s neck, scratching over Dean’s prickly hair. He moaned again. Dean’s fingers ripped at Sam’s shirt, buttons popping and scattering on the floor. He leaned down and tongued Sam’s tattoo, hands roaming over his stomach and abs. Sam bit his lip, hands everywhere, fisting in Dean’s hair, on his shoulders, anywhere he could reach. Dean’s mouth found a nipple and sucked, hands coasting over the hard ridges of Sam’s hipbones, tracing along the waistband of his jeans, riding low from the grinding. Sam writhed under Dean’s caress, moaning his name. He was confused, he was shocked and worried, he was horny as fuck. He’d never been this hot before, not for anyone else. He gasped when Dean licked a hot trail to his other nipple, fingers sliding just below the waistband, a bare inch from his begging cock. Sam whimpered. “Dean…” Hips shifting, trying to achieve some contact, any contact, with his brother’s fingers. 

Dean dropped to his knees before Sam, licking down his chest and biting at his abs before unbuttoning his jeans with his teeth and unzipping his jeans. Sam clutched at the sink behind him, looking down at Dean, eyes glazed with passion, lips red from the kiss. Dean jerked down Sam’s jeans and boxers roughly, and Sam sprang out with a moan. Dean took Sam’s erection in his hand, licking his lips and groaning before giving a teasing lick. Sam’s knees nearly gave out. If Dean’s didn’t….he did. Dean opened wide and sucked Sam fully into his mouth, his hands gripping his ass away from the sink. Sam yelled out, knuckles blanching on the porcelain, his head thrown back. Dean sucked up and down, tongue lapping at the underside, making small satisfied groans in his throat that Sam could feel against the tip of his cock. Sam gasped for air, his entire frame on fire, ass clenching around his brother’s fingers, sinking startlingly deep. Sam found himself wishing Dean would move his fingers inward an inch or two, so they would brush against his entrance, sink inside while the sucking heat encompassed his dick. Just thinking about it had his muscles clenching, tension building. “Dean, ohh..I’m gonna..”

Dean pulled himself off of Sam with a wet sound, and Sam groaned in disappointment. Dean got up and kissed Sam brief and hard while Sam panted against the sink. He broke it with a mischievous grin. Sam growled and pushed Dean back onto the table, Dean collapsed backwards on it and Sam pulled Dean’s shirt off, chucking it onto the floor and squeezed Dean’s hard-on through his jeans, his rough panting matching the roughness of his hand. Dean moaned and arched into Sam’s fevered caressing. Sam ran a hand up Dean’s chest and back down, reveling in the fact the was able to touch him however he pleased. Sam was about to unbutton Dean’s jeans when Dean’s eyes popped open, green piercing, and he wrenched up off the table, dislodging Sam and flailing him backwards. Dean urged him to the bed and pushed him down harshly, spinning Sam so he landed on his stomach with an “Oof”. Immediately Dean pressed against Sam’s ass, pulling him up so he was on all fours on the mattress, his jeans around his knees, open shirt pushed up around his shoulderblades. Sam groaned, hips futility grinding against Dean’s denim-clad cock, knowing the tip was peeking out of the waistband, hard and shiny, begging for his mouth. Sam groaned into the sheets. He heard a belt buckle unfasten and a zipper through his harsh breathing and then Dean was rubbing against him, hot flesh to hot flesh. Sam moaned, spreading his knees as far as he was able, arching his back to try and get more contact. Inside…He just needed inside…He thought, shifting restlessly against the mattress.

Dean left him again, but his groan was cut off when he felt Dean’s tongue against his entrance. He yelped and bucked, not sure if he wanted this. It was so good, it was so wrong, but oh god it was so good. His nails scratched the sheets and Dean’s hot tongue swirled and probed. Sam fisted his hands in his own hair and made carnal noises into the mattress. Even he didn’t know if the noises he made were human. He was losing his mind, his cock was weeping, his brother was doing dirty things to him. The world was falling apart. A finger prodded him and he changed his mind. He was falling apart. Dean sunk a finger into him slowly, growling, grinding himself against the back of Sam’s thigh. He wasn’t sure if he could wait anymore. he shoved another finger in, causing Sam to yell out one minute then groan the next, pressing against his hand, gasping. The muscles in his back clenched and rippled under his lightly scarred skin. Dean bit his lip and scissored his fingers, nearly reaching his feverpoint. Sam yelled and writhed, “Dean…please.” he moaned, trembling. Dean pulled his fingers out and positioned himself, jerking Sam’s hips closer. Sam eagerly moved with him, muttering words of encouragement. “Oh Dean, yes, finally, come on, just do it, please, god, Dean just do it.” 

Dean thrust into Sam, both of them calling out into the motelroom. Sam’s knuckles were as white as the sheets. He bit his lip, hair in disarray. Dean held into Sam’s hips and thrust harshly, grunts leaving him with every thrust. Sam’s muttered encouragements increased in volume, soon he was shouting, head back. “Dean, Yes, Fuck, that’s so Fucking good, Yes Dean, So Good, More. MORE. MORE.” Dean’s fingers scraped down Sam’s back, red lines in their wake, and latched into Sam’s shoulders, pumping hard, the slap of skin in skin echoing in the room. Dean growled with every thrust now, his muttering joining Sam’s pleas. “Yeah, you like that don’t you you little fucking skank. Tell me what you want. You like this don’t you, you like me fucking you. Yeah, you’re a little cockslut aren’t you?” Dean leaned down and bit st Sam’s spine, working him hard. Sam’s back arched into his mouth and he gasped, one hand snaking down between him and the blankets and wrapping a fist around himself. He groaned, three rough strokes of his hand and he yelled loudly, spending himself on the sheets, clenching around the still moving Dean, his muscles tensing, shuttering with pleasure. He collapsed on the bed a second before Dean was giving a strangled moan, spurting into Sam with rough jerks and collapsing beside Sam on the soiled sheets.

There was a minute of ecstasy-infused silence, both of them depleted before Dean gave a weak chuckle. “Oh, by the way Sam?” Sam looked over at Dean, watching him gaze at him from the opposite pillow, the white framing Dean’s face. “Yeah Dean?” He said softly. Dean grinned, his eyes flashed unnaturally. “I’m not your brother.”