Becoming Microwave Madam – Chapter 6
9 to 5 equals 7 (see note) on days that are busy they're home after eleven. Both of them work and their schedule's real tight it's what they expected, but this busy isn't right. So she gives up her job to stay at home life gets more relaxed and the stress is all gone. Double incomes were trouble for no one got rest and they realized division of labour would suit them best. So he brings in the money while she runs the house. Has a job - a career, while her dreams hit the dust. Ingrained gender roles shaped her ideas of life so she made the home her priority - it was HER choice. This stage won't last long because she'll get really bored. She's got serious hobbies and she can work from her home. He wants a wife who's like he is, and does what makes her happy she'll earn a lot less but their home will run easy. He keeps weekends for his hobbies and the home's run without stress it's a simpler life. More relaxed. And they both feel it's for the best.
9 to 5 equals 7 to 7 is a reference to 2-hour commutes that extend the working day.
I invite you to read all chapters of Becoming Microwave Madam and understand why many women give up their careers and stay home.