The long consideration of surprise, consternation, and waffling uncertainty does not surprise her or cause her any turmoil about whether she should have asked. There's an attentive mmm with a small nod of her head at his statement as he says it while she's already toggling between check-box options. She knows a lot of what's happening outside the world, and it could be that, or it could be other things, too. There are many things in this place, and all places, even whatever world or dimensions he came from, that could cause something as such.

Sabine reached out easily and shook Blake's hand,
even though her mouth is already quirked slightly by his second statement.

"Sabine. Just Sabine." A flicker of a smirk to go with the second part, but it's a flash in the pan here and then gone, before her eyes narrow a little consideringly the next, playing along with his little smile and offering of his second. "Interesting nickname, there. Are you often quarrelsome and antisocial? Or is it some kind of inside joke?"