It was a good thing he'd gone on, because sure enough, she'd opened her mouth to indignantly protest. That makes her shut it, though, and frown. She's used to trusting someone's judgement unequivocally, as doubting them opened the group up to huge vulnerabilities, and she applies that here, too. It's easy for Willow; she's naturally trusting.

"A mind spell... But who did it? That's pretty advanced, difficult magic, and I bet you guys are harder to control than the average person. There can't be that many people here capable of doing that."