This story has been bothering me for DAYS, I cannot find it!
Basically, the team (minus Thor I believe) get kidnapped and held in the same room. They are tortured and Bruce is drugged up to keep the Hulk at bay. The main kidnapper takes a liking to Tony and kisses/caresses and adventually rapes him along with tons of mind-rape. I also remember he makes him crawl to the other Avengers and shave/clean them.
[Spoiler (click to open)]I def. remember the kidnapper making Tony shoot Bruce who is begging Tony to do it
PLEASE PLEASE PLEASE help me !!!
EDIT: FOUND!!! http://avengerkink.livejournal.com/6021.html?thread=9608325#t9608325