One, often subtle, distinction you need to make when your making cultures is the difference between cultural norms and limits.
A norm could be something like “Women should become mothers and stay at home.” But there could (and would) be exceptions, even if they were rare. If you made it clear that ALL women were wives and mothers I would assume that I was missing something. Also noteworthy is that with norms you might have no enforcement of this other then social pressure, mostly likely from the group itself.
A limit could be “Women ARE wives and mothers.” This would mean that there are no exceptions allowed. This would also mean that you would need something external to enforce it. There will always be outliers who want to swim upstream, even if they only want to do so to prove they could.