Please, please, please be pro-active about this and do something quickly! As previous posters said, check your state laws, and if she is not within her scope of practice and, as I understand from your post, has actually harmed your MIL by working outside of her scope, pursue a legal avenue. ESRF is a complicated, fragile condition that requires a delicate balance of medications, diet, and lifestyle to manage. While a CNA may be able to help your mother in many ways, this probably requires an experienced RN to truly manage her medications. Even as an RN, ESRF makes me nervous because of all of the intricacies that goes into managing it. Good luck with your situation!