He had assumed by other guy she was talking about Steve but it looks like he was mistaken. There's only one other person who comes to mind. "You were talking about the other man named Bucky?"

It occurs to him he hasn't seen the older man in a while, not really since leaving the arena. Perhaps not an unusual occurrence as the other Bucky seemed disconcerted by his presence (the feeling wasn't a one way street by any means) but something he now has to think about. It's a concern for another time though.

"A boy named Aang." Bucky doesn't hesitate, thinking that maybe if Shepard wasn't giving her points to anyone else she might be willing to send them to him. "What is it supposed to be?"

He's talking about the cupcake now.