It hadn't even occurred to Bum that they were still very much in public until Steve brings attention to it, and he immediately feels himself freezing up again. Oh, sure, if anybody tried to bother them, he's quite sure Steve would drive them away, but there's still that background anxiety of having eyes on him, especially in a situation like this.

The question catches him by surprise. He kind of wants to run, in all honesty. He's also aware that's not going to work and just make things worse -- something he definitely doesn't want right now that it seems they've finally made up, more or less. So while there's still a very subtle hint of annoyance in his expression for a moment as he glances away, his answer is genuine.

"...No."

And as if to emphasize it, he wraps his arms and legs a bit tighter around Steve so he can hold on securely while they move. Please move. What he wouldn't give for some privacy right now.