Neville's scream sent a chill up her spine, but she couldn't swell downstairs. Her husband might wake from it and she had to get that key back into the cloak.
When she entered the room he was still sleeping, though she didn't know how, so she picked up the cloak and slipped the key quietly back into its pocket, laying it over the chair in the corner before picking up the rest of their clothes that had been scattered about. It would have seemed odd for her to just pick up the cloak and nothing else.
Then she slipped back into bed and kissed Lucius' lips softly before settling in against him, waiting for him to wake.