My current gf has been raped and molested in her past and says that because of that she can't orgasm.

I know its not me because I've been with a lot of women and have an excellent track record of making women cum. Not only that I usually spend a good 20-30 minutes going down on her and fingering her before penetration. We both have a great time during sex, but I do feel like something is missing because of her inability to orgasm.

Is there anything I can do in bed or outside of bed to help her achieve an orgasm? I'm sure everyone is going to suggest therapy, but she's been to a lot of therapy and while it has helped her emotionally it hasn't helped her with this problem.