"It's what?" She snaps her book shut, and looks up at him then. "Not optional? What's that supposed to mean, Malfoy?" It makes her feel...nervous. Unsettled. Threatened. She doesn't like it when he says things like that. The wand is on the bedside table between her armchair and the bed, and she snatches it up, bringing it close to herself and half-glaring at him. He sighs.