Wincest + belly bulge please and thank you.
Maybe it’s the angle they’re at, or maybe it’s the fact that Sam’s so skinny these days, but - yeah, there it is. Dean’s cock is bulging from his little brother’s belly like there’s no tomorrow.
He doesn’t notice it at first - he’s fucking Sam over the Impala, grunting in his ear. It’s when he brings his hand ‘round to Sam’s belly to give him more support that he feels it - his cock moving in and out of him.
“Holy shit,” he hisses in Sam’s ear. This is the first time they’ve fucked on the Impala since Dean’s been cured of demonism, and they’re enjoying the hell out of it.
“What?” Sam grunts, trying to brace himself against the hood of the car. He’s so close to coming - just has to concentrate a little bit more, and he can get off on Dean’s cock without even being touched. “W-What’s wrong?” he bears down on Dean.
“Can feel myself in you, sweetheart. C’mon - you feel, too.” He holds Sam tightly so he doesn’t slip, and then brings Sam’s hand - one that’s currently holding him up - to press against his own belly.
And yep - there it is. Sam can feel it, too. It might be the hottest thing he’s ever endured. He gasps suddenly, and he’s shooting all over himself, all over the head of the car. He clamps down tight around Dean, and spasms. “F-Fuck - fuck --”
Dean growls, and that spurs him on, too. He shoots deep inside Sam, rocking through the aftershocks - could swear he feels his cock twitching in Sam’s belly. “Fuck - there you go, baby. Such a good boy.”
Sam slumps on the hood, face touching the metal. His legs are shaking. “Dean - fuck. How...”
Dean nuzzles his neck. “Dunno. But we’ve gotta figure out how to do that again.”