Solz, a suggestion. In family worship, you could chose as a discussion the first century GB and talk about Antioch. Read about the men that went down to Antioch to push circumcision. Ask her, “who were these men”? The answer will open her eyes.
Mind you, there will be a certain amount of yelling afterwards as it sinks in who they were. And you will use Watchtower publications to demonstrate it.
Its a banger.
If you want help, I can lay it all out so that you understand it clearly.
its an eye opener