Blink.

"... Are you sure?" he asks, then mentally smacks himself because of course she's sure, she lives here. But it's his polite go-to in place of you've got to be fucking with me. "Sorry, I mean it's just that that sounds... really, really unusual to me? All this stuff has to come from somewhere, right? I get that this is probably some weird--weird, uh, side dimension thing, but there's gotta be something."