You're never going to win, as long he has a need for his mother's approval. He'll never fix the lost time with her, and now he's doing the same thing with your child. NTA time to move on.

Updateme!

Have you heard the saying: Don't bring a knife to a gun fight." The sword isn't practical for self defense.

Wait until he brings his daughter to the hospital to meet the new baby, OP is going to go mental.

I have a sister who allowed her bio daughter's stepfather to peep on her, and then make my niece apologize to him for freaking out, NTA.

NTA - I have a friend who divorced her husband and he finally told her, he was only with her because he thought she would what's get money from her parents. She's an adult, she'll either figure it out or she won't.

Lord, I'm so happy my kids don't want children. The idea of grandkids distresses me.

What are weird for them to die on. You might as well put a picture of everybody’s dead parents or relatives at your wedding based on their logic. NTA