She didn't really mind the surprised reaction. It wasn't the best she could have hoped for, but it wasn't the worst it could have been, either, and she didn't really have the experience of that snog or his reactions to other women to judge it by.
She watched his expression a moment, just in case somehow she'd misunderstood everything after all, before grinning once more and giving a short laugh in an effort to lighten the mood before something profound or terrible happened. "You're sort of a rubbish kisser, Doctor."