New iPad on family sharing plan - 3 months free Apple TV+?

Hello. My ipad is new but I am part of a family plan for Apple TV+. In the Apple TV app I am being prompted to sign up for 3 months free and then I have to pay. But I’m already getting Apple TV+ with my family. What do I do? Sign up for 3 months free and hope I don’t pay after 3 months?