(((((((((( seeker ))))))))))))
I have many regret for taking a similar responsibility, but my heart wouldn't allow me to not do what I did 2003, sooooooo, I spend most of my time taking care of my mom, if she had been abusive to me, I'd never subject myself to this emotional drain, especially losing my dad 2002, then taking up north to reside, and all the other stuff that went with that, has drained me, I go to support meetings (caregivers and Alzheimers) and stay with my pdoc visits as well as meds. Not to scare you, but taking on the responsibility needs a lot of thought and decision making.
But if she has never respected you, and was abusive, I personally would have it hard to want to care for her.
See if seniour services/counsel for the aged/ or even social services can suggest before you burden youself.
Please take care now,
DE