This girl knows she has the privilege that not being a mutant affords her, but that doesn't mean she's not concerned about the current tension going around about those who are less than human. Kate's not about to out anybody regardless of whether they're comfortable with their status or not. Everybody has their secrets and for some, that's theirs.

"How old are you?" Come on. She really needs to know. If he read her mind, he would have known that was coming.