STARK NEEDS TO LEAVE ON SHORT NOTICE — maybe something about his company, he doesn't elaborate — and leaves Steve alone in his huge mansion with the instruction to wait for Miss Potts. Steve finishes off all of the things Stark ordered for breakfast (you don't just waste food, after all, and this is the first time in months he gets the caloric intake a super soldier requires), and kind of walks around a little lost until he tries one door and the robot in the ceiling makes a honking noise and tells him he's not allowed to enter. So Steve has to awkwardly ask this Jarvis thing where the bathroom is and then make sure there aren't any cameras to, you know, record him peeing or something.
Unfortunately, he sees that he dribbled a bit of that weird green avocado stuff on his shirt when he washes his hands. It's not his shirt, to be precise, which means someone had to peel him out of his uniform and dress him, and Steve would rather not think about that, so he wets a little toilet paper and dabs at the stain while leaving the bathroom, and when he looks up, there is a lady near the front door. Steve blinks, hand automatically going up to tip his hat, only he doesn't wear a hat, he's standing there with bare feet and a stain on his shirt and wet toilet paper in his hand, and there is a lady. Steve feels a little mortified. "Uh, um — ma'am–?"