Steve didn't really want gently-delivered truths from Tony. He never had. But he could see why Tony was trying to be sensitive here. They were discussing the man that Steve clearly had some strong feelings and opinions about, romantic or otherwise.
"I never really thought he'd be that sort of person. What is it called.. polyamorous? I mean, I knew he'd changed a lot since the forties. I guess I just hadn't realized how much. He and I -- we didn't exactly spend a ton of time together after, ah," Steve made a gesture, indicating their own sort-of breakup, "Point is, I didn't know he was into that. But I guess, when you're trapped in a place like this for an extended amount of time, you discover all sorts of things about your friends that you didn't previously know, huh?"
Natasha having a sister. Wanda taking over an entire town out of grief. Bucky pretty much hooking up with Zemo in the future. And Sam being okay with it. All sorts of fun things.
Steve laughed and shook his head when Tony implied that drinking would help. "You know, as entertaining as it would be - figuring out how many bottles of this stuff it takes to get me drunk - I'm sure you and the hotel both believe that once is enough. Come on, Tony. That can't be all you've got."