I also want to set some ground rules and I want hubbys help to enforce them. I have asked my mother in law indirectly and directly (but always politely) to share responsibility but she does not listen.
I love being structured but I am not because hubby wants food according to his mood that day so even when I have tried the grocery planning in advance, I end up constantly deviating.
I am very blessed that my mother in law is very active and able to help around the house so much. I know most mother in laws cant or wont do much around the house. I guess I am in the opposite predicament because she is TOO active!
My rules would be:
DIVIDE AND CONQUER: Both she and I should distribute the house room by room and stick to that ONLY. If I have cleaned my room already, you dont need to come in and remake the bed and start dusting it again.
PARENTS RULE: If the children are asking something, like can I go to a friends house, it is the parents job to say yes or no,not a mother in laws. If there are no parents around, then sh can be responsible for making the decisions.
RESPECT: Respect other peoples need for privacy and space. If someone is going out dont assume that they need you to come with them. If their door is closed, it does not mean that you can still walk in anyway.
God I sound mean..but I dont mean to be because she is overall a really nice mother in law. But I just feel in the shadows in her presence and overwhelmed with the responsibility of taking care of her.