https://www.dailymail.co.uk/tvshowbiz/article-12307559/Fleetwood-Mac-singer-Christine-McVie-left-staggering-fortune-estate-worth-whopping-70-MILLION-beloved-brother-grandchildren.html
And her grandchidren and various charities. No surprises there.
i think it's her brother's grandchildren
Looks like she had no children of her own, so that would make sense.