If it wasn't obvious she was teasing, he would consider giving more of an answer to the part about him not being around to keep an eye on things - that she keeps an eye on things too, for one - but Bigby can tell the intention behind her tone, so he doesn't.

Instead he focuses on the more serious part of this. It's not like he hasn't spoken with many people here about their situation, drilled it into the heads of the local idiots to take it seriously, but Snow just understands it on a level that the others here wouldn't. With Connor now being gone, they're the only Fables here.

"Someone must have realized. We're not in the same situation as all those mundies here. People would know."

Not that people back home might not care about the other people now trapped here - but it's just that Fables have a little bit more reason to assume that it might not just be a regular disappearance. That they know about inter-dimensional travel.

"Yet no one's managed to reach us." Bigby doesn't fully sound concerned, but that might just be because it's Bigby, because that tone doesn't come naturally to him. Instead he just seems very serious as he speaks to her.

(He's still not pulling his hand away from her own though, all the same.)