Part of her wants to look up and make a teasing comment about him continually calling her beautiful, but she's not stupid. The serum enhanced all her positive qualities while dimming the rest, and even in her own world, she's still held up as a standard of beauty. Here...

"Are witches all unusually beautiful, then?" she asks, standing up once it seems that he's settled all his gear where he wants it. "Where I'm from, it's usually the opposite."