Having been all of them - full time working woman with no kids, full time working woman with kids, part time working woman with kids, and full time stay at home mum with kids, I can honestly say I LOVED being a full time stay at home mum (SAHM) when the kids were at home more than ANYthing. I did it for 9-10 years. Best years of my life tbh. It was the best life IMO.
I have 2 kids - a year apart, and I worked part time til they were 6 and 7, but found it so hard, as I was still doing everything in the house (as OP is, and as most women do!) and although I worked 24 hours (and not the 36 hours full time everyone else did,) I still did as much work as them over the week(s.) Indeed I seemed to do more than some full timers. And I got Royally fucked off with the scornful 'part-timer,' and 'it's all right for you' type remarks. SO when they were 6 and 7, I gave up work, and stayed off for 9-10 years.
However, I would never entertain being a full time SAHM forever, as I think you're making yourself very vulnerable. You are taking yourself out of the working world, and dispensing with any career you may have had, and if your husband fucks off and leaves (when your kids are grown,) you are on very shaky ground.
I have seen many women in their 40s and 50s, who have spent 30-35 years at home with the family, and their husbands have left them, and they are forced out to work, and have had a terrible problem even getting a job stacking shelves. Most of them get a job as a carer because they can't get anything else, (and anyone can get a job as a carer.)
I have seen them fight tooth and nail to get hours, and scrabble down the back of the sofa to find coins because they're on the bones of their arse. No support from the husbands because the kids are grown. And the kids either sit on their arse doing nothing all day, or they have a part time job but earn very little.
Seems great being a SAHM all your life, but it can bite you on the arse later on in life. So don't be too envious @pollyflickthekettkeon
Also, saying SAHMs with children at school are unemployed is inaccurate and nasty. That kind of comment comes from jealousy and bitterness. There are quite a few snide and catty remarks on here at SAHMs who love their life. Speaks volumes about those particular posters.