[It's a peculiar effect of the nephilim that their parents become protective of them. It's how they survived to adulthood; it's why Gabriel had to kill them. The closer Lucifer is to her, the more distant his own disdain for the child is. He crouches down beside Buffy, fingers drifting through her hair.]

We could. I know a Slayer has never been mother to a nephil before. And I know that God has been wrong about almost everything else...