My suggestion... (I'm a girl) Buy her two things: a) a shower massager, and b) a vibrating egg... Those two things are sure to get a girl to her first orgasm.
My best friend said "I *think* I've had an orgasm before" and I bought her an egg... a week later, we got together for coffee... she said "I have now become a woman" lol
Anyway, good luck. A lot of the problem with her not cumming during oral sex could be her *trying* too hard. She needs to relax... She also needs to be able to tell you what feels good. Make sure she's comfortable with trying new things.
Have fun along the way!
