How do you handle an owner who books one dog but has two?

The first time, the owner let me know that her foster dog might still be here when I did my stay. She said if the second dog was still at her house, she'd change the booking.

When I got to the stay, the foster was at the home along with the owner's dog. The owner didn't change the booking to reflect the second dog. I should have brought it up, but didn't. She gave me a great review and a small tip.

Then she booked me again for one dog. I asked her about the booking and she didn't mention a second dog, but there were two dogs when I got to the stay. Her house is always dirty so between that and the booking issue, I don't want to sit for her again. I would like to get paid for both dogs on the current stay.

I'm wondering how best to handle the situation. How would you handle this? Thanks