My husband always did a lot to help his two aunts who lived many miles from us and from each other.
When one aunt, who had no children, died she left money (several thousands each) to a dozen great-nephews and great-nieces but left two of our children out. No idea why, nothing untoward had ever been said and there was no explanation with the will.
My husband was heartbroken. He gave our two children the same amount the others had all received out of the money his aunt had left him. So he, who had done so much for her and her sister over many years, was the only one who lost out financially.
We've never told our children as he didn't want to spoil their memories of their great aunt.
I can't forgive her though for upsetting my husband so badly.
She was one of those people who are all for "the family" but she had no understanding what a devoted father he was, and is.