Every couple with children lands on some kind of system to share the labor. Sometimes people switch or days, or months, or they agree to have one person take on the housework while the other focuses on supporting the family financially. There is no perfect recipe for a happy family or marriage, but the important thing is that everyone feels valued and not like they're being taken for granted. There's not a single thing wrong with taking on the role of a stay-at-home mom, but it is wrong to be pushed into that position and then resented by your partner for 'having it easier,' as if managing a household is not a 24/7 occupation.
Like we said, find the balance that works for you, but make sure all parties understand why it's 'balanced.'