She overpaid. Granted, she doesn't know by how much she overpaid, but that's not the point - she's going to keep that key for as long as it damn well pleases her.

"I can walk with you as far as I can go, Prince Charming."

Shortening the amount of time left alone is a good thing as dar as she's concerned.

"And I can meet you right there," the smile goes a little sheepish at the edges. "To be entirely honest, I am going to be pacing and muttering to myself the entire time either way."