I think you did exactly what you should have done. You made her follow the rules that all your other families follow. She complied until she could find other arrangements with rules she liked better. That's all it is. It's nothing personal, she wanted to save money or have someone that would do whatever she wanted without being charged or questioned. I'm sorry you have lost income, but clients who don't want to follow the rules that are the same for all clients need to go elsewhere. Good riddance and good for you for standing up for yourself. You will eventually find another family that signs on and follows your policies without argument.