Esther wrote:
Are you able to give your mother a proper day off?
If not a professional to take care of your sister and dad for the day, maybe you can look after them while your mam gets pampered in town, a respite from everyday drudgery.
Could you take her in to town while she gets a massage or gets her hair and nails done? I think that would fall around £100.
This.
Plan a day for her that she can leave her caretaker role.
If your dad can look after her, do something with just you and her.
If not, see if you can hire a professional for the day, or maybe even for a couple days.
I don't know how National Health works in England, but in America caretakers can often get a respite care allowance where the person stays in a nursing home for a week or two while the family vacations or gets away from the situation.