He turns away fast, his head bowing and his hands sliding quick through his hair, self-soothing and panicky, his breath coming in ragged and loud in the silence. And then he moves forward again and snatches up his wand from the arm of the chair, before walking away with stiff, sharp steps, without a word; across the bedroom and out the door. He shuts it with a carefulness that makes it clear he wanted to slam it, and she hears it lock behind him. She can still use the key that dangles from a small chain by the door to get out – she knows; she has tried before. Malfoy locking it merely keeps her safe from the other occupants of the mansion.