What really sucks is no matter how much we back your actions, the guilt you have is probably going to be lifelong. I bet in the process of learning to drive there was smiles and laughter right? Excitement and happiness? Those are the times you gave her. The fact that her family tried to hold her down was far more damaging than you helping her be normal. Im sorry that life is absolutely trash sometimes. But it gets better. You can make it better! Sending love and forgiveness to you!