Okay, so a while ago I read this fic where John and Dean were still hunters. Dean in this story was a girl though  and really shy/meek instead of his normal cocky self. John is pretty big dick in this fic and from a young age started having sex and "training" Dean to be very submissive. Somehow on a hunt Dean got turned into his boy self and I remember John saying that because Dean was a boy now that he didn't want to have sex with Dean and was going to go find someone else. Dean got all sad and possessive and convinced him to stay and they had sex.

I don't think Sam was ever with them in this fic, maybe he died as a baby, maybe he'd left for college, maybe he'd never existed period, but I'm about 95% sure he wasn't in the fic at all. I would really appreciate any help in finding the fic! Thanks a ton in advance! :D

FOUND IN COMMENTS: The story is here http://blindfold-spn.livejournal.com/4508.html?thread=5535132

If you'd like to read it as well you just need to join the blindfold-spn community to access all the fics. :)