Interesting. When my father was terminally ill with cancer (she was in her 40s then) she wanted him offloaded as soon as possible and had him in the local hospice far sooner than he ever needed be as she knew the director and laid it on thick about how she was struggling to cope. Dad was nowhere near needing intensive nursing care at that stage.
She also did the same to her second husband 20 years later when he was in the same situation, and also to her batchelor brother who lived with her.
However, she would love to sweep onto the ward, ensuring everyone was aware she had arrived and projecting and playing a role. Not that of a loving wife, but overdressed and very theatrical and being all sparkly for everyone but dad. Looking back, I wonder if she really couldn’t cope or face with anything less than 100% perfect?
She managed to play the grieving widow wailing and ‘fainting’ at all their funerals though!
I gave no advice that might help you, apart from agreeing that if your mother doesn’t want to visit, you can’t make her and tbh, if she was unwilling, it might create a negative vibe for your dad.
I know it’s not easy, I’ve been there exactly and not sure I could have done it, but are you able to temporarily withdraw some of your support? I’ll admit to occasionally blocking my mother’s number when I wasn’t in a good place or didn’t feel strong enough for her nonsense. I know you are trying to shield your sister too, but maybe suggest she does the same, so your brother will be forced to step up to the plate?
You deserve and have more than earned quality time with your immediate family. Please take care and look after yourself. X