well it shouldnt cost you anything because she ran up the back of you and her insurance will cover it, the vehicle should be restored up to or to a better standard than it was before. if she doesnt have insurance youd better hope that you atleast have full comp other wise it might be court for you two. if you have full comp you still wont have to pay anything if she was at fault.

i do hope it all goes well, cos its happened to many of us.