Would it hurt him, just once, to do what she wanted and shut up about it?
"If I wasn't sure," she snapped, "I wouldn't have said.... ow shitshitshitshitshit!"
She dropped the wand again to clutch the top of her head, which she'd just slammed against the underside of the sink. It hurt, enough to bring tears to her eyes, and she dropped back to sit on the floor and cradle her head, completely defeated. "Ow. And don't you dare open that door."
Naturally, he opened the door.