How long did mum live after receiving end of life care

Choices:
A. a year
B. 6 months
C. 3 days
D. not enough information
3 days
Relatives of a dying lady I was caring for kicking and screaming not to give their Mum pain relief because they were so terrified / knew it would probably be the thing to end her life.
She had a horrible aggressive cancer that ravaged her whole body and needed very regular doses of strong pain relief which - as she had a terminal illness and was receiving end of life care - did not have an upper limit so to speak. She had pain relief as and when needed to make her comfortable and that often results in people ultimately overdosing.
Mum had Alzheimer's and was howling and writhing in agony so we were giving her pain relief but daughters knew it would probably result in her death - which they were right about possibly happening and in their grief and panic, started trying to prevent us from doing anything. Didn’t want us getting near her at all and we had to go through an awful scenario of trying to explain what we had to do for Mum and why and when they still wouldn’t have it or allow us near, we had to do what nobody wants and go against their wishes by administering the pain relief anyway.
One daughter screamed the place down, threatened to have me arrested and struck off / said she would go to the papers and tell them about how we killed her Mum and in the end she had to be removed from the bedroom.
Her Mum was given the pain relief, immediately relaxed and fell asleep then died peacefully in her sleep about 15 mins later.
The saddest thing is her daughter wasn’t able to be there and see her Mum dropping off so peacefully and her last memory will forever be of her screaming and thrashing about as she (daughter) was physically removed from the room.
Tragic.