She almost flung herself across the room in her need to get away from him.  Her wand was out almost at once, and he didn't think she'd hesitate to do something far nastier than the approved hexes they'd all learned at Hogwarts.  He didn't think it would slow him down much if what he really wanted was to grab her.  He'd endured enough cruciatus curses to be able to work through pain, but he held his hands up to show he had no plans to attack and said, "I don't mean sex."