[ He notices the way she rubs her head, and stares for a moment, like he's expecting another sign. The question just gets a snort and a shake of his head. ]

It's standard questioning when someone admits that they've been screwing with time and created an untold number of duplicates of themselves.

If there were another of you, you'd be able to tell. Itching. Sweating. Some less enjoyable side effects that come when you introduce a paradox that you'd be better off avoiding. Denial is the first stage.