Katherine smirked up at him when he told her she didn't have to kill anyone. If an Elena ever stole him from her, or anyone for that matter, she wouldn't hesitate to kill her. But as for now, Damon seemed more than content with her, and she was glad for that. As he picked her up, she wrapped her arms around his neck before he ran at a vampire's speed toward the apartments. Obviously, he was in as much of a hurry to get back as she was.