My sister added names to the family group that had not been researched and sourced. We want to remove them until they are temple ready.
@Sharon Anne Wiest
I am just another 'lowly' User/Patron ...
[ And, I happen to be a Member of the Church ... ]
Just in passing ...
Short Answer: I believe, that ONLY your Sister, can "Unshare", from a "Family Group", those she "Shared".
Here is a "Knowledge Article", in 'FamilySearch':
I hope, that this may help/assist, somewhat.