My sons step mom

I’ve about had it with my sons step mom and his dad. Ever since they’ve gotten married its been one problem after another. From her trying to make him call her momma, to her trying to make up lies about me neglecting to take care of him about something that literally never happened. She is literally trying replace me as my sons mother. They’re trying to get Full Custody and My son came home from visitation telling me his Daddy and step mom were talking about having her ADOPT HIM. Who the fuck do they think they are? All I freakin want is to civil and be co parents and they have to go and pull some shit like this. I just want to be able to be friendly and take care him together without bullshit. It is so exhausting. It’s never going to fucking stop. I’m am just so livid. I know it will never happen because I will never give up my rights or do anything to get them taken away. I just honestly can’t comprehend what goes through their head sometimes.