Not completely dissimilar thing happened with my Nan. 8 kids, half lived far, half near, aunt two doors away. Aunt took her shopping and popped in often, others didn’t, not only because they were raising a young family but because when they did, she was deeply passive aggressive about all the things they didn’t do for her ans ‘oh, you finally found time to come and see me, did someone die’ sort of thing.
She was a toxic, miserable old cowbag who was consistently unpleasant to any child aged 2 to 16 (god knows she never should have had kids) and nobody really wanted to spend much time around her.
When she died, quite a lot was left to said aunt then split between the seven of them, and most of them bitched about how little they had got out of her house after paying her mortgage for so many years whilst she freely gave away money to shopping aunt, tens of thousands over the years (she has always been bad with money).
Reality check: she could bring herself to withstand her toxicity and was physically always there for her. You chose not to come round or you chose to move away and assumed others would deal with the burden of her.
Oh, I went off on one.
I have a bigger problem with your brother not giving you a penny. What’s that all about? It sounds quite dysfunctional to me.