Homesick, I'm not familiar w/ a double stack 9mm particularly suited to women. The best I can recommend is to let her handle some of them.
Yeah, I think your best bet will be w/ a single stack 9. In addition to the ones already mentioned, I'll add some more, in no particular order:
Kahr PM9 (a more expensive version of the CM9)
Kahr CW9 (a no frills, slightly bigger version of the CM9)
SCCY Industries CPX
ETA: It's very important that she handle the gun to be sure she can manipulate the slide. The smaller semi-autos usually have pretty stiff springs so that lots of women have difficulties working the slide.
This post was edited on 11/18 at 6:38 pm