I just spoke with a trusted friend who knows my sister and the situation going on.
He said the reason my sister won't allow my mother to pay for private school, is due to race. It had not occurred to me that had anything to do with it. My sister is white, and her ex was white, so my niece is also white. Her husband is black.
My mother is very conservative and never was crazy about the fact my sister married a black man, though now she does not say anything about it. My mother's husband feels similarly. When they grew up, in the south, it was taboo and just was not done often.
Even though my mother would never have said anything about race to my sister when she offered to pay for private school years ago, my sister's husband would have taken it to mean public school wasn't good enough since there are more blacks than private schools around their area.
The whole thing is ridiculous because this has nothing to do with race. The public school is 70 percent minority races and 30 percent white. The private schools vary but are anywhere from I'd say 10-20 percent black and the rest white and other non-black races.
I could care less about the race issue, and it had not occurred to me until my friend brought it up. It's the quality of education that matters. My niece already has friends of many different races and is used to being around diversity, in her liberal church, city choir she's in, and other social activities.
My friend says my sister, who is very into social causes such as the "Black Lives Matter" protests, gay rights (has taken my niece to several gay pride parades), etc, would think that private school having fewer blacks would be a bad idea. There are even some very liberal private schools yet still she sees more whites and fewer minorities and thinks that's bad.
Unfortunately it makes no logical sense to me, to keep my niece from private school due to there being fewer minorities than public.
However, there's nothing I can do. The public schools in her area are good. The private schools in her area are better, academically.
My nieces brings up how much she wants to go to Harvard, and my sister says great, and encourages it. Yet, she won't allow her daughter to go to private school, which would increase her chances of getting into a better college. Maybe not Harvard, but likely better than if she stayed in public school.
My friend brought up that she's not my kid and there's nothing I can do. My sister makes the decisions and that's true.
It is sad my mother said she made the offer years ago, several times throughout the years, to pay for private school. My sister turned down her offer - I did not realize it until I asked today.
My sister's husband has always been antisocial in that he rarely goes to any family gatherings - making excuses. He never has made an effort to get to know anyone in the family, other than my sister and his stepdaughter (my niece).