bring her to the gun shop and let he rpick out what she gravitates towards. That's what my wife and I did. I'd schooled her on all her options and explained tnos of stuff, and as sono as she got to the shop, she tried a couple semis I'd earmarked for her. She hated them. She doesn't like the mechanics of a semi, so she started trying revolvers. She's far more confident with the revolver she bought, and is actually willing to shoot it, as opposed to the semis which would have rotted in the safe or turned into my BUG.
The gun your g/f hates is the gun she won't use. A gun you won't use is a dandy paperweight .