Wasn't sure where to put this, I hope it belongs here.
So I'm seeing this girl for a few weeks. She's 30. She's very sexual and has a great libido (even better than mine

). I noticed that she never cums when we have sex, but didn't think too much of it since I know these things can take time (and since it looks like she's having a good time anyway).
The sex is good but it's pretty vanilla, nothing too freaky. She gives head but doesn't want to receive head (I tried to go down there twice, and she stopped me both times before I reached south. It's a damn shame too because I'm very good at it). She's way too self-conscious in the sack.
A few days ago we discussed masturbation jokingly and she said she never does it. When I asked why she said she never feels like it and that she doesn't bother because she never cums anyway, and she never did. Never in her life, not alone or with someone else. I changed the subject because I felt she's feeling awkward and I didn't want to put any pressure on it.
Now I'm not sure why but this got to me and I set a goal for myself to be her first. What I'm asking from you is advice on how to approach this. Like I said she has a healthy sex drive, but I think there is a psychological issue that stops her from letting go. What can I do about it?