Your sister was privileged.
Or poor. SAHMs come in both the upper middle class version and the poor people version.
Also, there are a lot of temporary SAHMs during the years when childcare would be very expensive.
What a “modern” SAHM mean for a family also reflects deeply on what is expected of the man. A man with a SAHW doesn’t have to worry about dinner, laundry, diapers, washing the floor and vacuuming.
I think SAHMs vary a lot in responsibilities.
My husband actually does a lot of dinners when we cook at home, but he definitely didn’t do the other stuff. We have a cleaning lady twice a month, but I do a lot of spot cleaning. (One member of the household–naming no names–almost invariably leaves a big mess on and under her chair in the kitchen and in the bathroom several times a day.) Cleaning help is one of those take-it-from-my-cold-dead hands things for me. I’d much rather work and make the money for cleaning help than do it all myself–there have been times where I nannied for other people, but still had a cleaning lady.
I guess my version of that would be: his socks and underwear magically multiply in his drawers, his work clothes magically appear on hangers in the closet, the kids go to school while he’s still in bed, the kids are brought home while he’s at work, the fridge is magically replenished, the plumber and other tradesmen are dealt with, the school emails are read and acted on, the kids do their homework, Baby Girl’s backpack is unpacked and her school folder checked, Big Girl does her music practice, the kids clean their rooms, the kids have all of the uniform items they need, the beds periodically get fresh sheets and pillow cases, we have soap and toilet paper, the kids go to the doctor as needed, get their flu shots, go to the dentist as needed, go to therapy as needed, playdates get booked for Baby Girl, the kids go to birthday parties with appropriate gifts, the kids get help packing for school trips, old clothes go to friends and Goodwill, toys go to a baby cousin, Baby Girl is given baths, major scheduling conflicts are prevented, school meetings are attended, Big Girl gets help with the music club at school she runs, small dead animals are disposed of, etc.
As Baby Girl ages out of needing a lot of hands-on care (feeding, clothing, potty, baths), it’s getting more and more clerical and managerial. But, at the same time, as the tuition crunch increases, it’s ever more urgent that I start making some money for our children’s needs.