"Draco, you will not die because of this, and nor will Narcissa. Not if you do exactly what I say. Which is what I was going to say - ah yes, I must ask you to swear, not an unbreakable vow but I will charm you. Swear you will tell no one else, any part of this. What happens tonight mustn't be repeated outside this room. I will know if you do." His words held heavy in the office, the charm it seemed already at work.