A little update, after talking with my grandparents and other extended family members I've found out a few other things:
1. She got my sisters liscense suspended and most likley mine too, for having the cars in our name and unregistered on the road.
2. She completly destroyed our credit ratings, by taking out loans in our names.
3. A Subpoena was sent to my sister last summer, summoming her to court, she was unaware of this, as it was mailed when we were on vacation, and my grandparents intercepted the letter. (They are our next door neighbors now)