A Resource For You Maybe?
Conjurus,
First, I want to say that I hear your difficulty, your pain.
My wife's Therapist had given her a copy of Allies in Healing: When the Person You Love Is a Survivor of Child Sexual Abuse by Laura Davis. It is a companion book to Courage To Heal, a larger book that is for survivors (sufferers as we say here).
I hope you have other resources to help you, like a Therapist or Psychologist, but perhaps the books will help you and your girlfriend. I have a Barnes & Noble nearby and they were both on the shelf there, a testament to the scope of the issue in our society.
I will just add that the "Allies" book is wonderfully written to be inclusive of everyone. The various topics are written from ALL relationships view points. One area will be from the viewpoint of straight couple with female abuse survivor, the next with the husband as the abuse survivor, then from a gay or lesbian couples perspective. Guess I am saying that I feel you would find it as very inclusive for all. I found that to be a plus, frankly.
I wish the best for you.
ISH