This is a post for another person and this is what they have for the fic so far!

Well, it's basically a fic about Sam fucking women after Dean fucks them because it's as close as he can get to sleeping with Dean. And, then there's scenes of Dean feeding Sam his come from his hands and eventually they do have sex. So, comeplay and Dean/OFCS and Sam/OFCS. That's all I can think of.

So that was all they could remember so it'd be very much appreciated if anyone could identify the fic! Thanks!

Found! Fic in comments!