My mother wouldn’t let go of her mother when she was so far gone she was essentially a vegetable. She had a standing resuscitate order on this walking dead person when she choked on her own tongue.

She forced that poor woman to live like that for 7 years, with a feeding tube, etc.

I strongly suspect it was primarily so she could pillage her multiple pensions and savings as long as possible.

If she expects me to take care of her in her old age, she needs to go talk to my brother.