For many women going back to work a few months after having a baby is overwhelming and unmanageable. As strange as it may seem things get even more difficult for a working mom after the second and third baby arrive. By that time the romance of being a modern 'superwoman' wears off and reality sets in.
It's very trying on a marriage when you're doing a one hour show week after week after week. You don't have enough time for people that maybe you should have top priority.