Step Daughter problems (need advise)
It's way past time for tough love. When you keep GIVING her stuff that makes you what is known as an "enabler". One car, maybe. The second should have never happened. It's time for a serious counselor, and some tough talk---and be ready to back it up--from you.
One thing that is REQUIRED is rent money, chores around the house, and money (to you) for food.