I have POA over my Mom. My mother has alzheimers/dementia, diabetes and incontinence and I am her primary (only) caregiver. Can my sister take guardianship without my knowledge? They (other siblings together) want me to put her in a nursing home and I refuse. I take care of my mother to the best of my abilities. My siblings absolutely give me NO help with her. I took her to a well checkup in July. The last well check up was in Jan. with no sickness in between. A nurse sees her twice a week and thinks I do a good job with her. Could my sister really do this without my knowledge or a court battle?