How can I get my partner to priorotize me?

I recently got married. My husband is a very nice man, but he is too much attached to his parents... A mamma's boy to a certain extent. He shares almost everything with his mother, this deters me from sharing things with him. I fear that he will tell my mother in law. He looks forward to having them around while I cherish my privacy. How can I get him to prioritize me now that I am his wife and tomorrow we will have a family of our own?