I don't like it. SHE should have to be the one to leave!
You keep looking for LEGAL ways to "make" her leave. There are more than one way to skin a cat. I bet we could start a brainstorm right here of ways you can make it much more difficult for her to stay.
OK, I'll go first:
Keep the thermostat at a temperature she hates.
Disconnect the hot water from her bathroom sink. Or put the hot water heater on a timer that works for YOUR schedule, and not hers.
Start parking your car where she likes to park hers.
Stop taking phone messages for her.
Be sure to cut off any and all financial support for which you are not legally responsible.
Take over the main TV.
Stink up the kitchen with your favorite dish that she HATES.
OK, that should get you started.
When my aunt got a divorce, she moved in with my mom. My mom loves her little sister, but they are two stubborn peas in an old German pod, and they can really clash when they're together too long. After just about two months or so, my aunt had her own apartment and had moved out. Someone asked my mother, "Hey Delores (not her real name), how'd you get Janet (ditto) to move out so quickly?"
"Well," my mother explained. "When she came to live with me, I made her comfortable. (pause) But not TOO comfortable."
