Quick question/suggestion on racking a slide.
How is she attempting to rack them?
I suggest she takes her weak hand and hold it above her bellybutton at about 90°. Take the strong hand with the pistol and place the slide solidly in her week hand. Have her grip the top of the slide with her whole weak hand. Then, have her push the pistol forward with her strong hand. Once it is all the way forward, release the weak hand. This method works well with my wife, mother, and mother in law.