She is my mom. She let our stepfather abuse us our whole childhood. I have POA, she lives in the same town. I begged her to move to my town since my sis passed and there was no one else to take care of her in her old age. About 3 years ago I literally woke up and had a flash back that really opened my eyes about the abuse and her part in it. I don't want to take care of her. She still lives alone. She has early Alzheimer's or dementia, its pretty common in her family and she is 78.
Renounce that POA, call her counties Dept of aging. Tell them there's a senior there with mental issues who needs help and has none. You can do it anonymously if you want. Or you can say ,I want NOTHING to do with her......PERIOD!
This is YOUR life now and YOU CHOOSE WHO YOU LET NEAR YOU, EVER AGAIN!
From your expressed concern, you can probably be an advocate for your mother. Help with paperwork getting her Medicaid qualified. Help find in-home care, meals on wheels, etc. until she is placed in MC. Help find a MC. If APS has contacted you already, they may be willing to help get you named her guardian so you could place her in MC near you.
You can walk away from your mother entirely and let APS handle her declining mental function, and given your hurt and anger, maybe you should. Since you apparently still have some loving feelings for your mother, there would most likely be a bit of guilt to handle taking this route.
No one else has experienced your pain or knows your personal strength at this point in your life so no one else can really advise what you should do. Look at your options and decide which one you think would be the less overall painful then start down that road. Keep in mind you can always change direction if the path becomes too difficult to handle.