The kid may be an annoying pain in the ass that he will feel perpetually bitter about young, but he's astute at least. It's exactly the thing Bucky himself had been thinking, starting from the moment he ran into Peggy and doubling down as she mentioned Clint, all but solidified by Natasha's sudden appearance. He frowns, lips pulling back into something thoughtful and displeased.

But he doesn't have an answer to provide, and speculating will do them no good. So, like an ADHD train, he changes tracks again. Clears his throat.

"Listen- nobody here... knows about what I did back home, who I was, except, you know." The people that were there. Not even Peggy knows. "That's not... really who I am. So I guess what I'm saying is... I'll keep your thing hush hush if you keep mine. Deal?"