Thank you, Juls and Mamabear,
I got a lot of support just by reading your replies.
I finally decided to put an end to this mess and called a meeting with the Chief MD at my father´s hospital. We decided on a date to settle my father´s fate, once and for all, and I told him I would not contact the rest of the family, because of the problems I´ve had with them so he asked the nurses to contact them. They will all be there, also my brother the doctor and his wife.
My sister tried to call me, drunk, but I put the phone down. Her husband tried to call me then, he was suffering from a hangover, but I told him I refused to talk to anybody in a mind altering state or if they were mixing medication. No comment from him.
I went to my father after work and we had a lovely moment together. I read to him from one of my short stories collection and then we talked about our crazy life in Spain, Thailand, Marocco, Scandinavia and so on. An old artist came to see him after that and I left them together. My father told me he had one wish for me, that if I would remarry, he hoped I would never to marry an artist. I whole-heartedly agreed with him.
So, it´s under control for the moment. I will try not to get into more fights with them. I only wish for peace and quiet. I will regroup myself before going over the estate, which is already rife with problems. But another day for that!
Thank you both for good advice and wonderful support.