So I'm going to be helping her find something that fits her needs. ^-^
The .38 Special revolver with hollow point ammo is a good ladies' gun. It's simpler than a semi-auto. Also, it doesn't require the kind of grip strength the user needs for racking the slide.
I would recommend a revolver with a hammer, so she can cock it to make the trigger pull lighter when she fires. If the trigger is too tight, but she wants to be able to fire it without cocking it every time, a gunsmith can ordinarily get a lighter spring assembly installed for her.
BTW, there is such a thing as a gun being too small, especially for a female. The gun needs to have enough mass to absorb a decent amount of the recoil. I once test-fired a very compact .38 Special revolver for my wife to see if she could handle it, and I could barely stand the kick myself.