I am a SAHM but work part time.
ANY household work and child rearing and responsibilities, does not only happen, during the week. It happens on the weekends too.
Being a stay at home parent... it means they have NO day offs, no vacations, no time off, no breaks, no holidays, and it is 7 days a week 24/7.
Being a stay at home parent, their work does not "stop" just because their partner is now, home.
If my Husband, expected me NOT to do any household/child matters, while he is home, I would tell him he is being unreasonable and crazy.
Because, being a stay at home parent and doing ALL of those things, means you are on call all the time, and doing ALL of these things, all of the time 7 days a week.
AND, just because my Husband is the "Breadwinner" that does NOT excuse him from doing housework too, and child rearing too, AND taking them to their extracurricular activities. Being a parent... is NOT contingent upon if someone works or not. Being a parent, and being a part of a family means... that BOTH spouses, do these things. Just because someone is the breadwinner and the other is not, that does not mean one has to do less housework, than the other. BOTH spouses, should pitch in and take care of the home and the kids.
My Husband helps here and there. He also does ALL the grocery shopping. Because I hate, grocery shopping. Although my Husband works, he does things too. Here and there.
There was a time, when he had this chauvanistic attitude, that just because I was the SAHP, that *I* had to do everything because I am home. Well, so I told him off. It pissed me off. Because that is just a primitive & UNFAIR way of thinking. This is HIS house too, these are HIS kids too, this is HIS laundry too, these are HIS meals too.... thus, HE HAS TO HELP TOO. AND contribute to the household upkeep and child rearing.
That's just the way it is.
And if he, told me how to manage my time and told me what to do and told me that I shouldn't be doing housework/cleaning/cooking/shopping/laundry/child sports while he is home. Then... fine. HE can do it.
In fact, a couple of weekends I.... was so irked by his "expectations"... that when he grumbled to me about how I shouldn't do things when HE is home on the weekend, I said, fine. Then, I... went on strike. I did NOTHING. Because that is what he told me to do. And what happened? Well, NOTHING got done. Nothing. Because I was not doing all that *I* typically do on the weekends for the house and for the kids.
He got the hint.
It was about time.
But... when I did do nothing on the weekend like he wanted me to (since he was home), he got irked. Because nothing got done. But then when I did do things/housework on the weekends like usual, he gets irked too.
Can't win.
It is very frustrating.
Anyway, I don't know if I understood your question. But, although I am the SAHP, *I* expect, that EVERYONE in the house, HELPS. Even, on the weekends. I "work" 7 days a week as a SAHP. My Husband has a traditional job. Working 5 days a week. He has 2 days off because it is the weekend. I have no "weekend."
NO matter if someone is a SAHP and the other is working, BOTH spouses should help. It is their home. It is their kids. That is what a family is. For me, no one is exempt, just because one works and the other does not. It is a joint effort. It is a family. A SAHP parent, does "work."
For me, what a Spouse/parent does, is NOT a matter of who is the Breadwinner or not. It is based on, that BOTH Spouses are parents and live in a home, and have kids, and thus, both Spouses has a responsibility to upkeep the home and do things with and for the kids. It is a matter of responsibility and being a family. Not about who works or not. As a SAHM, I "work" my butt off, everyday, 7 days a week 24/7. And I do that FOR the family and our home.
Weekend or not.
Sure it would be great if I had weekends off and my Husband did everything. But that is not happening.
If you Google search "how much money does a SAHM make" you will be amazed.