As long as she isn't giving up her regular treatment for hokum, I say more power to her. Try whatever you can. It's when they forego the regular treatment that's a problem. I heard that in Steve Job's biography he said that if he hadn't opted to refuse surgery for homeopathic methods that he would most likely still be alive. While he couldn't be for certain that he would actually still be alive, I think he could be quite certain that he would have at least had a fighting chance.
Even if the open windows of science at first make us shiver after the cozy indoor warmth of traditional humanizing myths, in the end the fresh air brings vigor, and the great spaces have a splendor of their own - Bertrand Russell