Inspired by the sloppy seconds prompt above. Steve's on the receiving end of a Hydra gangbang, and after everyone else is done, they fling (post-WS) Bucky to the floor at Steve's feet and order him to fuck Steve as well. If he doesn't cooperate, they'll just use one of the old trigger phrases to make him do it as brutally as possible in Winter Soldier mode.
+ Steve is being stoic... about how much the original gang-rape has already mentally ripped him to shreds. (Extra points if he was a virgin.) He gets that Bucky doesn't have much of a choice, but he's not in a position to offer much reassurance, or hide how much it fucks him up to have Bucky touching him--however gently--where he's just spent hours being horrifically violated. Of course he still tries to offer what little reassurance he can, because it's Steve, but he's barely holding it together.
"Either you take a turn, Barnes, or the Soldier will"
+ Steve is being stoic... about how much the original gang-rape has already mentally ripped him to shreds. (Extra points if he was a virgin.) He gets that Bucky doesn't have much of a choice, but he's not in a position to offer much reassurance, or hide how much it fucks him up to have Bucky touching him--however gently--where he's just spent hours being horrifically violated. Of course he still tries to offer what little reassurance he can, because it's Steve, but he's barely holding it together.