She has to bite her lip, a lot, and the amount of squirming she can really do is limited by what's going to pinch at her back. What escapes her a small, needy little noises as she buries her hands in North's hair and holds on.

Moving her right leg is surprisingly painful in this position, but her left is okay, and she's able to hook it around him, brushing her foot over his back.

She swallows down a moan and can't help but breathlessly laugh, fingers flexing in his hair. "You tell me to be quiet and then you--ah! oh god--do this. Oh fuck, yes, yes there--you are such--ah!--an asshole!"