I have an 83 year old sister, who lost their only daughter in 2007 and her husband in 2009
She has gone downhill since, and seemed to give up when her husband too died,.

She had a fall last Christmas, three weeks later they found a tumour in her brain and operated,
She now has Dementia of some sort, social services said she could not live alone, so a granddaughter and family moved from their rented flat into her home (which she owns) but has became worse is very confused and angry, the day centre won't have her any more, and social services say they will do nothing because she has family with her.

She does not recognise anyone most of the time and keeps trying to call the police because she says her granddaughters husband has broken into the house!

There is no answer, but who in a case like this can or should end her life?
Mick.