Pewpewcachoo
Family love is not necessarily linked to blood. Sometimes circumstances create superior conditions of well-being. Acceptance of our choices must come from ourselves, but we also seek validation from those who put us in the world, it is natural for us, it is a reflection of our heritage as a species that seeks collective prosperity. It's painful to hear the denial of everything we seek and what makes us who we choose to be. Family comes from the desire for acceptance, to be part of something bigger than ourselves.
just give them genjutsu and make them remove the mother's name from the family tree and put in their minds not to get involved with your family anymore and then that's it, use the genjutsu ability in a good way without needing to beat around the bush because your opponent is not a mutant or a person with special abilities