"Hey." Spike took her shoulders and turned her to face him. "You didn't kill Rex. Most would've. I would have done it." He shook his head. "I know you, Slayer. There's no way you'd have killed a human being if there was any other way." He brushed a strand of hair out of her face. "And there's no way you wouldn't spend ages agonizing about it and wondering if you did right if you did."