I think it's far more likely that your brother has told your mother that it would too complicated for 3 of you to be involved in her finances, and wouldn't it be a good idea if he did it? It doesn't sound as your mum would disagree, because "men know about money."
It isn't (or doesn't need to be ) complicated. Firstly, your mum doesn't (seemingly) have capacity to understand and weigh up her choices - trying to explain / discuss is a waste of time, and simply adding to your problems. So, actually any agreement needs to be between 2 people - you and your brother. It is ridiculous to be emailing round and round in circles, simply to buy groceries. If you are now moving nearer to your mother, you will be the one "on site" to assess what she needs day to day.
Sorry got posted posted mid sentence!
It makes sense that you have access to at least one account, to make payments as required, and knowledge of where the rest of her money is. As has been said before, if you brother were to die suddenly, you need to know what is going on.
It isn't (or doesn't need to be ) complicated. Firstly, your mum doesn't (seemingly) have capacity to understand and weigh up her choices - trying to explain / discuss is a waste of time, and simply adding to your problems. So, actually any agreement needs to be between 2 people - you and your brother. It is ridiculous to be emailing round and round in circles, simply to buy groceries. If you are now moving nearer to your mother, you will be the one "on site" to assess what she needs day to day.
Sorry got posted posted mid sentence!
It makes sense that you have access to at least one account, to make payments as required, and knowledge of where the rest of her money is. As has been said before, if you brother were to die suddenly, you need to know what is going on.