My brother isn't particularly old, just 65. He has one daughter, she lives abroad and is 25. She was a much wished for child, my brother and his wife struggles immensely, refused fertility help on religious grounds and when she arrived she became everything to them. They had a nasty split, her mother was mentally unwell, she took his daughter back to her home country, he wasn't a lazy dad, he genuinely believed her mother would be happier at home and his daughter would be happier with a present and happy mum but soon after she moved her parents passed, then 6 years ago she took her own life, by this point his daughter was in another country from both of them, at university, where she has stayed since. He is fiercely protective of his daughter, visits as much as he can.
In late November he was diagnosed with cancer, terminal. He has refused treatment, he doesn't want the fuss of it and he won't be convinced not by us anyway. He is still relatively well in himself right now which I think may be why he is refusing treatment, nausea and fatigue but little else, but was told months at most without treatment.
Now his daughter is visiting over the new year, she is newly engaged, we are having a big family party. He doesn't want to tell her, not now, not before it's his final days. His argument is that it won't do anything to soothe grief, only start it earlier. He doesn't want her to worry, try to move back or panic.
I'm feeling very morally confused by it, on one hand I believe its his right to decide, on the other I don't want to lie to her, he plans to pass any illness off as feeling unwell, maybe the flu. He is quite a rigid and traditional man, he writes to her weekly, calls her but has no interest in a smart phone, so never FaceTimes. He was a tradesmen so email and phone calls were all his career asked of him, so she truly has no idea he is unwell. I also have a silent hope she might be the one person who could convince him into treatment, especially if she sold it as being around long enough to see her married, but I al think this is why he doesn't want her to know, or at least partially.
AIBU to want to tell her? I've spoke to him, he won't give me permission to so it would be against his will, which isn't something I want to do, but somewhat feel it may be necessary.