When Mum went to this home, one of the first task we were given was to fill in an 'End of life Plan' for her.
As there was no panic my brothers and I were given the time to talk about it between ourselves and also with the staff at the home. We reached agreement quite easily (well, I'm the eldest so they are used to being guided!
). I was therefore confused when mum last had breathing problems that the same GP felt the need to check that we still felt the same. 
Merlot, I'm glad you are not at odds with your brother, I've posted before about not being on good terms with my brothers for many years, and know how much we missed!
I hope your Mum can be left in peace now and be allowed to exercise her choice. It must be a very difficult time for you all - well apart from your wine drinking brother 