you know what's so rude? Her saying, 'you'll just have to clean up after me."
I can think of tons of things I'd have said.
Like, "I'll help you clean up, but I gotta go right now, I can't wait, that's why I stopped, I'm sorry." While I danced in the doorway.
Or even "It's not that much, it's just water," or "my boots aren't really dirty" (questionable truth, of course--but still not the same breathtaking arrogance as "you'll have to clean up after me")