By now Bucky has realized there are people who look like him - some from Billy's world, some from other places entirely - but Natasha is from the same place as Clint as far as he knows, so what he sees on her face for the briefest moment can't possibly be recognition. He just doesn't know what else it could be. He supposes maybe he looks like someone she used to know. He'll ask sometime, but not right now.

"No, you were right. James Barnes. It's just no one calls me that much." He returns her smile, slow and easy, and reaches out to shake her hand. "Pleasure to finally meet you, Natasha. Your partner talks about you serving him his dignity on a platter with so much affection it's... almost disturbing. Watch the head next time, huh?"