She cocked her head, partly to acknowledge the gesture he did, and partly to move away from his hand. It was purely a reaction - it seemed more affectionate than what she had expected at all, and caught her off-guard.
"The change won't be easy since the poor girl is your biggest fangirl in the world, but perhaps that exactly might help me get in her place. A hint, or even a complaint, that she has been stealing your, um, property, would be enough."