Teach her to do the push/pull method when racking the slide, this requires a little coordination but if she does it right it will work fine for even the smallest of stature. Hold the gun and form a C clamp with the opposite hand using all four fingers and the thumb. C clam the rear of the slide near the rear sight where the grooves are, push forward the grip in the right hand while simultaneously pulling rearward with the left, this should generate enough momentum to rack the slide with minimal effort. It will require her to practice it though! Tell her to not ride the slide once it is pulled rearward let the slide "slam" forward to rack. Also teach her failure to fire drills and how to get a semi auto back into the fight! My last suggestion is to get her decent training and make sure to routinely practice shooting with her. Congratulations.
