Mary had to hold very still to keep from throttling him. Because if she hadn't known he was being an arse he probably would have made her cry right now from feeling bad for having to turn him down.
As it was.
"Remus." She didn't have to sound miserable. Because she was a little just now, thinking that he'd do that to her!
"You should have said something sooner," she said, rubbing her face with her hands for a moment.
"It's just... I'm sort of seeing someone else." She peeked at him from her fingers as she made the admission, partly so she wouldn't laugh and partly to see what the hell he was going to do next.