Lock the door, and don't answer when she shows up unannounced. Stay in your bedroom (with a pillow over your head, if necessary... smile).
With folks like her, "hints" won't work. Be direct, and be a broken record.
PS - no answering the phone!! Let the machine get it - and screen the calls. You don't owe her, or anyone, anything. Get yourself well, Teke. Remember the airline analogy? You put YOUR oxygen mask on first, THEN you help others. Breathe, baby.
((Teke))