Radio, I am not sure of the history; however, can you separate yourself from them in terms of household chores, cooking, doing laundry, cleaning, dining, etc and just do your own thing.

For instance, pretend that you are living alone. Of course be courteous, extend salutations, acknowledge their presence, etc., but just live for yourself from now on. If they ask for something, can you say, "I'm really sorry, I cannot help you. I am busy. Maybe later"

Or if they question something, remind them that you are 3 adults sharing one space and everyone is responsible for themselves.

Is this do-able?