I've been in the middle of an iron clad estate deal since 2008. No end in sight.
But, it sounds like you all have a better setup.
Shame on family for not honoring their ancestors wishes. Lot of selfish people out there. Nothing like family to treat each other the worst.
Good luck to the gal, I hope it turns out well for her, and mostly to hold her head up high, from what you say she is in the right on this.