"I'll keep that in mind, sir." And she will, though getting blood out of floors or clothing is a minor concern for future activities.

Though... Well. Subtle as it is, she can suspect why the glass fell in the first place and the reason for the lack of sincerity on his part. It's not uncommon. Not even unwise. To dislike vampires, but.

"I hope, sir, you understand that I expect all my guests to be treated with respect. Otherwise, the offending parties will be asked to leave."

Formal and proud talk from a girl who's barely old enough to drink.