My DM with a learning difficulty is approaching her mid 60's and has taken on the role of an unpaid carer for her same aged sister with mental health problems.
She is schizophrenic but high functioning and an intelligent person in general, unless you saw her in relapse you'd never know she's unwell.
DM does everything for her. Housework, changing her cats litter tray, making tea, shopping, keeping her company every day and being a general lacky even when sister is perfectly stable which she is the majority of the time.
Her sister is perfectly capable of doing the things that DM does and managed perfectly well for 20+ years until DM lived closer. Taking the mental health out of the equation, she is a lazy person in general but simply gets on with it when nobody else is about to do things for her.
She has a support network in the mental health community, a brilliant CPN and support workers she sees regularly. Group breakfast mornings with friends etc. She doesn't need to lean on DM to this extent.
Myself, dbro and the grandchildren barely see DM because she's always tied up doing things for her sister and when we do see her, her phone never stops ringing, from the sister asking where she is, how long she'll be and when she's leaving etc.
I invited DM round for dinner last night, low and behold she had to rush off before long because the sister had called twice already.
I'm frustrated, angry and think it is all too much for DM who has been prescribed antidepressants. Her relationship with her children is suffering and she has zero time for herself. Me and dbro have raised our concerns and DM does acknowledge it but can't seem to say no or put herself first which I believe is partly due to her learning disability and not realising she's being taken advantage of.
She's vulnerable and I'm genuinely concerned about the impact the strain is going to have on her health.
What can I do?