I would rule CMT out all together. Her legs look nothing like a CMT patient and she would have a long history to go with it by now. Looking at the images she definately has collapsed transverse arches and I expect no proximal stability in the hip joints or knees.

I would treat locally and get her into some not so offensive support for the shoes. Perhaps in her case some softer orthotics in the first instance. Do you have access to a good podiatrist? She might be crazy but then this does still look like a physical injury in the making if not present right now. A bit of reassurance might go a long way for someone with a long history of medical complaints.