Martha really hoped that the woman wasn't actually crazy, and was just Doctor-crazy. That would explain it. She did smile genuinely at the woman, "That's excellent! I'm glad you're not dying. Too much dyin' already with the Doctor."
Sure, he'd taken her to see the moon landing a few other fine places, but the family of blood was still heavy on her mind. Angels that didn't actually kill you but killed you weren't too exciting either - getting zapped here instead of wherever the angels wanted to live her to death was much better.
She tipped her head, "I guess, we can go see New York. Not really the Universe, but close enough for now. The thief ... is that the Doctor? And what should I call you? I don't think I can call you TARDIS out there."