What does Deuteronomy 13:7 mean?

If someone close to you—like your brother, your own child, your spouse, or your best friend—quietly tries to get you to worship other gods, even ones you’ve never heard of before, Deuteronomy 13:7 - Modern Text Bible

(This verse warns that even the people you trust most might try to pull you away from God, and you need to be aware of that risk.)