Everybody lives at Avengers Tower

Sharon: *knocks on Steve’s bedroom door in the morning*
Bucky: *answering the door with Steve’s pyjama pants and sex hair* Yeah, can I help you?
Sharon: Is Steve in there?
Bucky: Yeah, but he’s naked. Give us a minute
Sharon: I’ve seen him naked before
Bucky: Yeah, well you’re not going to see it again