Nathan's forehead scrunched slightly in confusion and concern, and perhaps a little bit of anxiety. He definitely wasn't used to her stopping him from something, and it wasn't like he could help that she'd managed to get him off early. It was probably a minor miracle that it hadn't really happened before.
He drew his hand away, feeling an unfamiliar, vague sense of guilt that he'd done something wrong. He definitely wasn't used to feeling that and he really didn't like it.
"Mandy...?" he sounded vaguely uncertain and concerned.