You have to read this one, my brain just totally melted
What rough beast by leonidaslion
pairing: sam/dean
pregnant:dean
status:complete
summary: based on this prompt "Sam/Dean or J2 non-con/dub-con gangbang and mpreg with Dean/Jensen strung up and gagged and relentlessly fucked by endless string of anonymous guys or demons or something to get pregnant for whatever reason - dystopian AU, evilSam, Hell, ect. After however many months he's hugely pregnant - big multiple pregnancy - and sloppy, used, desperate, horny when its finally Jared/Sam's turn."
This has a really evil evil!sam