“She is a different sect of Catholicism.”
There are no “sects of Catholicism”. She’s Catholic. She’s also a member of a lay organization. Neither is a sect. The lay organization has no ecclesial structure, no bishops leading it, no priestly orders, none of its own sacraments, doesn’t have its own liturgy or feast days, doesn’t have its own canon laws, doesn’t have its own scriptures or canon of scripture, and is open to people of any denomination as well as Catholics. It is not a sect.
So the group Mel Gibson belongs to is not a sect of Catholicism?