His eyebrows rise too, and once she starts to smirk, that's when he starts to laugh. "Well, I was thinking about borrowing a spot for a catnap, not doing any snuggling, but anything's possible." It's such an oddly amusing thought, considering he doesn't know Bucky very well, and he's even less well acquainted with the version Natasha knows. "Sounds like a good way to get to know a person." Obviously he's not serious either.

"Don't worry, I won't mooch off you for too long. But if either of you change your minds, just let me know before you toss me out." Because while he's still not being serious, he doubts either of them would have difficulty removing him from the room if they really wanted to.