There is always a trade-off with any firearm. I find the really lightweight small snub revolvers are usualy not at all pleasant for most people to shoot, yet carry like a dream and usually work 100%. The same guns with steel frames shoot a bit better but are considerably heavier, and both will have more recoil than almost any 9mm, but many women do prefer them for carry. I like most the little heavy barrel, 3in. steel J frame S&Ws if I am gonna shoot a small frame .38 much at all, but again, there must be a trade off and if she thinks it is too heavy she will simply not carry it.
Conversely, over many years I have also found that sometimes a female who has trouble working the slide on a compact auto can do fine with the full sized version. There is more to grasp and springs are often a bit lighter as well. On external hammer models, the hammer may also be cocked first so as to not have to deal with resistance from the hammer spring. Technique can also play a part, and while she may not have the strength to manipulate it the same way you do, by turning her body to keep the muzzle in a safe direction, holding the pistol close, grabbing the slide and then 'pushing' smartly on the frame may get the job done for her.
You might also look for a Beretta M86 with the tip up barrel. Ugly and AFIK not imported here any longer, they can still be found. The M86 allows the chamber to be loaded directly without having to cycle the slide, and while .380 is not my favorite round it beats a poke in the eye with a sharp stick.
Good Luck.