Thirtypence, as Thumbwitch says, you cannot judge someone elses reasons here.
My Mum suffered more than 46 years of abuse from these women.
Mum asked the younger one if she'd care to visit Dad in his final weeks and Dad asked his sister to promise him that she wouldn't tell the other(worse)sister, which she did promise him.
We made her welcome, I made her lunch and I drove her home(she has Parkinsons)after more than 5 hours...I even got some items of shopping for her at Dads request.
During the visit, she told my Dad that she'd take him home and look after him better(than my Mum), that she'd get him an operation to make him well...terminal cancer! you get the picture? This was all in front of my Mum in my Mums own home! such is the level of disrespect.
Anyway, when I took her home I was invited into her house and the smell alone was foul, but the sight of her sick husband would tell anyone that she couldn't have cared for anyone properly.
It seems that the first thing she did when I left was phone the other sister, who then phoned the other surviving brother whom my Dad was extremely close to and she accused my Mum of starving my Dad to death, having the window wide open with only a thin sheet over him(remember how hot it was at the beginning of August in the south of England?).
The decision not to tell the sisters was a decision that was made between Mum, myself, my brother, Dad's brother and his wife and their son(who does a lot of the care of the elder of the sister and we told everyone that the cousin knew nothing of Dads death, that way, he wouldn't get it in the neck from aunt and she couldn't demand that he drive her to the funeral)that the sisters would be told the day after the funeral because they would cause trouble(there are other factors that I wont go into, but they are even worse than the above). These are not nice women. My brother and I phoned the sisters at exactly the same time to break the news ~ that way, there could be no way that one could phone the other and one couldn't say that they were told after the other iyswim.
Two days after Dads funeral, my brother and I took the funeral flowers to the younger aunt to show her...Mum doesn't know this and I asked aunt not to mention it to anyone. I took two of the order of mass booklets with Dads photo on and some beautiful song words on for them...she could post one to the other sister. Soooo...other sister gets the booklet and immediately phones Uncle's wife and guess what she said?!!! 'There was no mention of me in it' can you believe it? Other aunt who happens to be my godmother phones my Mum(I could hear Mum talking to her and I was scared stiff that she was telling Mum we'd been over to see her with flowers and booklet etc)and she tells Mum that she wants nothing to do with Mums family ever again.
It is sad, but it is also a relief.
My Dad was born in India and from a(once)wealthy and highly respected family. Dad came to England in 1962 and met and married my relatively poor Mum. In other words, Dad married below himself and that was the start of the hate campaign.
That is why they were not told for 3 weeks Thirtypence.