Bucky is in a room alone with a person of your choosing when they say something that triggers his brainwashing or maybe he is just confused. And he rapes them. I'm interested in seeing Bucky rape a person who isn't willing to shut up and take it the way Steve usually does in these kinds of fics. Maybe the other person doesn't get that he doesn't really understand consent or that he was brainwashed and that he himself isn't capable of consenting. Cue both Bucky and person of your choice being overwhelmed with anguish. Bucky is horrified and disgusted at himself, maybe if he did it because brainwashing then he is also stricken with how his control was taken away from him again, also he probably thinks that he's become like his abusers because of what he's done and see, see, he was hydra all along, can't be trusted etc. and maybe he desperately wants to apologise but does the other person want to see him? Does he have the courage to suck it up? Maybe he begs the other person to ~~punish him~~ to make up for it.