"Those aren't our orders," Mafalda frowned behind her mask. She wasn't sure how Rodolphus would feel about them playing around with Granger, and she didn't really want to risk making him angry with her. But she did want to make the girl suffer, even just a little... Ah well. If Rodolphus got too angry, she'd just blame it on the boy.
"Took you that long to figure that out? Maybe you're not as bright as I thought," her voice was amused as she looked back to Hermione. "I suppose it would be all right to teach her a little lesson..."