I’m looking for a specific post-Avengers fic. It’s Tony Stark/Bruce Banner pairing. Right after the end of the movie, Tony and Bruce are showering together, and Bruce sees a massive bruise that Tony got when Hulk caught him. Bruce admits to remembering what happened during the battle.
Tony invites Bruce to stay. I’m pretty sure there is a line where Bruce jokes that it sounds like Tony is asking Bruce to marry him, and Tony says “not yet.”
I think Tony was in an open relationship with Pepper at the time.
Edit: Never mind. I found it. Here is the link if anyone is interested: