Dean shuddered as Sam came, his body tensing up, and he wasn't sure if that felt good or just really weird, probably both, given how weird all of this was anyway. He settled against Sam for a moment, just trying to breathe, and he wasn't sure what to do next, but he had to untangle himself from his little brother or his muscles would just scream at him for days.
Getting off of Sam, he stumbled backwards, falling onto the bed with a rough breath out, and his hand came up to run through his own sweat-soaked hair as he stared at the ceiling. This was insane. He just let Sam fuck him. This had to be the most ridiculous thing they'd done -- and yet it wasn't, and that was what made it weirder.
"Christ... did that just happen?" He laughed weakly, scrubbing at his face.