That's not the first time that someone's turned down a drink from him, of course, but it happens rarely enough that Magnus does look a touch surprised. But, smoothly as ever, he moves his hand in a circular gesture and the extra flute disappears.

He helps himself to a sip of his own champagne. Just because this young man isn't going to drink doesn't mean Magnus can't.

"I love a good blush," Magnus explains. "You look quite becoming like that. I'm going to have to make an effort to make it stay that way, but for better reasons, I hope."