Was she molested by her father, were her siblings? Thats alot of things for her to deal with her family, and you both were anxious and kept to yourselfs before. I think she could really use some therapy. It doesnt matter if she was molested to learn your father was a pedophile must devestate someone. maybe medication could help her clear her head. Alot of people try to self medicate with alcohol or street drugs. Maybe you could go together sometimes too