Most couples know they should ask, "Do you want children?"
That is only the first question.
Two people can both answer yes and still imagine completely different versions of parenthood.
One sees equal careers and paid childcare.
The other expects one parent to stay home.
One expects strict discipline.
The other rejects it.
One expects grandparents to be deeply involved.
The other wants strong boundaries.
The differences become real after the child arrives.