"Thank you so much, Mr. Malfoy," Astoria said sincerely. "I can see where Draco gets at least part of his charm," she added prettily. The compliment at least, was sincere. Even if Astoria knew, or suspected she knew, what Lucius Malfoy was, he had raised the young man Astoria was desperately heads over heels for and that went towards quite a bit, in her inexperienced mind's eye.
She followed Draco's lead out of the room, and allowed him to cast warming charms on them both before they went outside to walk.