The article/study being discussed on The AM show actually said that working mothers work an average of 98 hours per week between home and work. It's data from the US where casual labour for house cleaning etc is cheap as chips ... hire some help.
When we both worked and had younger kids to look after we just paid a bunch of people to do work around the house. We were still financially better off than if one of us had stayed at home.
With modern appliances the daily laundry, cooking and dishes are a piece of cake. If you pay someone to do the weekly house keeping, there isn't much at all left to do on weekends.