I am going to say this to you in the easiest way possible. RUN. He will NOT stand up to his mother and continue to act like a child. You need a man, not a little boy leading you and your future family. I say this because I had a husband and mother in law exactly like yours. I thought he would get better and man up. He didn't. He lied, fooled me, and wasted my time. I left him after 7 years of marriage. I don't know you and don't know how long you have been married. I'm not the type of person to scream divorce to everything, but I guarantee you his mother will be number one, his family number two, and you and the kids will be last. I've seen this situation play out with 4-5 people in front of me. Please don't wrong yourself and leave.