Take her to the range and have her try semi-autos and revolvers. I would tend to recommend the revolver in 38 or 357/38 with a 4 inch. But you said she does does not gripping the K frame. You might let her try a Ruger Police Service Six. I have one as well as K frames Smiths. The grip on Service Six is like the K frame but is some what different. Also, as some posters said the Ruger SP101 3 inch is a good option. So is the J frame Smith but try to stay in the 3 inch range on the barrel. Its all a matter of what she would be comfortable with. You might even have her try a semi-auto in 380. She might be able to rack the slide easier depending on brand of gun. The 380 can be used as a home defense round. The recoil will be light. Beretta makes one of the best.
Good luck,
roaddog28