He turns his head towards her, then tips it candidly. "No. Thank you."

He doesn't glean any malice from her offer, begetting no insincerity in his rejection. She's not trying to get him in trouble for the sake of it. Apparently, she wants to help him understand. And, credit where it's due, it'd be an effective route to that understanding. One he could have taken himself at any time, before she laid out the consequences for him.