There's a moment where she misses what he's trying to say, where her understanding disconnects from what she's hearing and she thinks he means to take the magic away completely. It passes after a moment, when he finishes his thought, but the fleeting terror is easy to see. She takes a few deep breaths to settle herself before speaking.

"What... exactly does that mean? Can I still use magic after I'm... grounded? It can be reversed once I have control, right?"

She trusts him, but this is a hard thing to understand when she's stressed out and running more on adrenaline than sleep.