I just came back from Maternity leave with one baby while my partner worked full time. I was essentially a SAHM for 3 months. It was the most exhausting job ever, and that was just one baby. I have no idea how anyone can get any housework done on such a routine, let alone cook dinner. It’s more than working full time, it’s working around the clock. I honestly don’t know how someone watches 3 kids full time, and cleans the house or cooks. I suggest having your house cleaner come more often, like twice a week. It sounds like you can afford it. I personally couldn’t handle doing what she does.