To make sure you're okay.

[When they're only a few feet away, she slides a little ungracefully off the Ninetales's back (one leg, then the other, with her stomach and torso still pressed against the column of its spine) and regards him quietly, unconsciously mirroring the calm, independent posture she's seen her mother wear so many times before.]

But if you have Tom's charm then you must be okay, because we wear them to keep us safe and his was yours first.