Oh @ Mellyb I can totally understand that you are shattered .
I don't have any answers for you at this dreadful time .My experience was similar with my mum only it wasn't Bc , started off as bowel cancer & went to her liver .
She had a period of time when they told her things were on the improve & we all got our hopes up but it was not to be .
I have only recently found out that she declined treatment offered to her towards the end . I may have been told at the time but was obviously to distressed to comprehend or remember .
Sadly she was only 65 at the time , an age that is slowly creeping up on me , my mind will not let that go !
I hope your mum can make her decision & enjoy some lovely times with her family .
Thinking of you & sending you strength , love & hugs
Beth xxx