I feel for you, has your mother always been like this? It sounds as though she feels out of control of her own life so is trying to dominate and control yours. It is totally unreasonable to expect you to be changing curtains for Christmas and washing bath mats on Christmas Day!
Explain to her that you are happy to help out when you can but you can’t keep this up and she needs to arrange for carers and/or a cleaner to come in regularly. Once this has been sorted take a step back and start as you mean to go on.
I can sympathise as my own mother (late 80’s) has become more and more demanding. She is very stubborn and was reluctant to accept outside help but we made it clear that things couldn’t carry on and she reluctantly agreed. It took a while to get things in place but it has made such a difference. Carers pop in twice a day and she has a lovely cleaner once a week who she has grown very fond of. Visits to her are now much more pleasant.
You can’t allow this to go on, it will eventually make you ill, they forget we are also getting older and have our own health issues, grandchildren to look after etc. Sit down with her and tell her in the kindest possible way that you cant’t carry on doing so much and tell her what NEEDS to happen. Good luck.
Blusters in corner if my mouth

