I'm not sure about Mama's boy but Mama's baby means hubby was the baby of the family.

He was the youngest so his mother let him get away with more than his brothers because he was the youngest. She would make his favorite cookies, have his favorite dinner. If hubby wanted it most times he got it.

He expects life to remain that way but now instead of a mother there is a wife. Instead of brothers living in the same house he has the responsibility of children.

He needs to get his priorities in order. He'll still get his favorite cookies but not everytime he wants them.