AGH yes! Bucky just absolutely terrified after waking up from a nightmare, and at first he keeps jerking away from Rumlow trying to comfort him, but he's so worn-down and Rumlow is so persistent that he finally just gives in to it because he might as well take what comfort he can. (Even though it's tearing him up inside. He needs someone, but he's trying not to cry from feeling his rapist's hands on him -- it disgusts him but it feels so good to be taken care of after the memory of being stomped on so hard he vomited blood)

Ooh what if Rumlow even knew more about Bucky's needs than Steve and the Avengers?? Steve has been trying so hard to make Bucky as comfortable as possible, and is making all his favorite foods and rubbing his shoulders and everything, and Bucky appreciates it so much. EXCEPT. Rumlow knows the exact place to press to relax Bucky's aching shoulders, and knows what foods are too rich for his stomach. So in some weird ways he's better than Steve, simply because he's been handling the Winter Soldier for too long.