My gal pal is having the same problem and his behavior does lead into all aspects of their life.
It's ok for him to get off in bed but not her.
It's ok for him to go out with his friends but not her.
It's ok for him to go and come home whenever he gets there but not her.
It's ok for him to eat dessert and pasta but not her.
It's ok from him to not take care of their son (ie: feed & change diapers)but not her.
It's ok for him to put off the housework but not her.
She begged him to go to counseling and he said there's nothing wrong with him. Then she placed blame on herself trying to get him to go by saying that there's something wrong with her and that she need him to be there to understand what was wrong and why. You know what that fuckhead said, "that's not my problem".
I'm their son's Godmother and I'll be damned if I'll go to their house when he's home. I can't even look at him without taking a frying pan to his head - he took one of the strongest girls I know and put a huge crack in her soul and it breaks my heart.