my sister has had mental heath problems in the past and always blames my mother for this when all my mother has ever done is to be there for her
my sisters usual thing is to borrow money off my mother then create an argument and walk out so she doesn't have to pay it back
the last time she walked out for 15 month then returned again about 6 weeks ago
my mother is 78 years old she has cancer & 4 weeks ago had a fall breaking her hip
now my sister has applied to be full time carer so she will not have to claim benifits
I'm worried about her being there full time as she has said as recently as today that she still blames our mother for her problems
how do I stop her being a carer - please help
Any efforts to intervene would really depend on a clear answer to this question.
Even with mental illness your sister may be a good companion for your mother or may be able to help her in some ways. (My mentally ill brother did housekeeping for my mother, and got paid for it. She loved having him around.) But it does not sound like a suitable arrangement for her to be in charge of your mother's care.
Has Mother designated someone to be POA of finances and health care?
With cancer and a broken hip, is your mother eligible for hospice? Have you looked into that program?
Please provide a few more details, and maybe someone will have specific steps you can take. Littletonway has made some good suggestions.
Best of luck to your Mother.