She's looking at him a bit oddly -- probably, she supposes, the way people might look at her if she tried to explain Faerie to them. She knows about churches and all of that, obviously -- she's not that sheltered -- but the stuff he's describing sounds almost as fantastical as... well, any other kind of prophecy.

She frowns, opens her mouth, and then seems to think better of what she was going to say. Eventually, she settles on:

"How do you know all of that?"

Because the End of Times or whatever definitely can't be common knowledge, right? People would be more panicked, surely.