At the time she inherited it, he wanted to know how much, why she had it not him, as he thought he had a right to know. The solicitor apparently told him it was none of his business and refused to tell him anything. Things have been implied over the years, but nothing this direct.
He also questioned her getting her fathers share of his mothers will. He thought it should have gone to the remaining children. She obviously thought not.
He sounds nasty. I agree that he's after some of the money for himself, goodness knows how he figures he'll succeed with that. Does he think that, although you, the girl's DM, shouldn't have had access to her trust fund for her benefit (legally, you don't, of course, but considering you obviously never received any other maintenance from her DF after he died, morally, few would have blamed you), he, her uncle, somehow should?!
The fact that you and his brother were divorced before he died is irrelevant to the fact that he would want his DD to benefit financially from him - that's an entirely normal thing to do.
It's amazing how wills bring out the greed in some people, however ludicrous their claim to it.
When my Grandfather died, my great uncle (Grandmother's brother) started asking questions about his will. As it happens, he'd only just made a will a few days before he died, in the hospital, at my tactful suggestion and arranging, as my Grandmother has a number of mental and physical health issues and he had always paid the bills, so I wanted her to be protected (it was a joint will) and for my sibling and me to be nominated PoA, so that we could help her with everything now she was on her own and vulnerable.
As was pretty much always the case with couples of their generation (and is still very common now), their finances and assets were held jointly, so GD didn't really leave anything anyway, as it all automatically became GM's sole property, as makes complete sense.
As both of my GP's children predeceased them (one, very sadly, as a baby), GU was clearly of the mindset that he was now GM's next of kin and should therefore rightly inherit everything when she died. Leaving aside the fact that, although living in the same town, he's seen her maybe twice in the last 20 years (usually only when he wants to borrow something) and that he himself was then (15 years ago) already in his 70s, he apparently thought it fair that he inherit from his older sister (and then, of course, it would pass to his children when he died) rather than that her own GC - who live a distance away but still visit when they can and, in my case, spend hours each month on the phone dealing with her carers, doctors, hospitals, the council, utilities and many others, and dealing with her redirected post - should have it. Presumably as some sort of 'punishment' for losing our DF at a relatively young age.
Another relative who died at an old age, had, beforehand, written his will so that his money (he rented from the council so owned no property) would be split 9 ways, between his 3 sons, their 2 wives (one has never married) and their 4 children. Supposing the estate totalled £9K, effectively, this meant that 2 sons would each receive £4K split between their own immediate families and the other son £1K. The single son, who is one of the most generous and least greedy people I know, thought his £1K more than fair, as he was single and had no children, and was very happy. One of the sons with a family was also happy (albeit feeling it a bit unfair for his single brother to lose out); however, the other son was most indignant at this and he believed that it should just have been split 3 ways between the sons.
It didn't happen, of course - the will was executed as per the deceased's wishes; but his sense of 'fairness' dictated that, although his own immediate family would then only have received £3K altogether, the fact that, under his preferred method, HE would have had that whole £3K to himself, instead of his £1K (at the expense of his wife and his own children) was all he was interested in.