"Sure."

.. probably a little bit too simple of an answer in comparison to what Five himself said, huh. But it doesn't even sound like Bigby doesn't believe it, and that he's being dismissive because of it. It sounds weirdly accepting.

Not that it means Bigby actually understands what Five was trying to explain to him there, but.. you know, it's not like he's ever been good with magic, or whatever time travel falls under in this case. He's always found it easier to just accept these things as they come.

"Sounds like a pain," he adds, like it's a better summary than just 'sure.' Still works, though. If he's still trying to figure out anything in his mind right now, it's whether that would still make the other a mundy or not.. Probably not, huh. Or a very special kind of mundy. "Have you tried telling anyone else in town that yet?"

Bigby is mostly asking because he feels like they probably wouldn't believe Five. And he's trying to see if he's right about that. Get a feel of what the mundies in town are willing to accept.