Believing this should be the case is probably why your relationship(s) have problems. No woman wants to hear about your momma, EVER. I mean EVER. Drop being a momma's boy and you'll have a much smoother ride.
I consider it ironic that your first rule is to tell her to not nag you, then you turn around and state, that rule doesn't apply to me when I bring my mommy into the conversation. Talking about your mom is nagging her in a bad way.
I'm a lucky man, they get along and like each other.
If I tell my wife she doesn't cook like my mother it's a compliment. My mother was a lousy cook!