[ Clara's nothing if not a good hostess, at least. Even when someone's trying to convince her the comfortable life she has is a ruse. His question is answered easily, with no hesitation. ]

My best friend's an ageless time-traveling alien, thought it'd be a bit weird not to at least hear you out after accepting all that.

[ She isn't sure she can wrap her mind around it yet, but Clara's still more willing to hear him out than she was before. ]

If this is all true, doing nothing sounds like we're stuck here living some life that isn't ours. What is he waiting for, exactly?

[ Her questions are an attempt to understand as much as she can, and maybe along the way, more will start to seem less fuzzy. ]