If parents do not practice the True Faith, they cannot impart that True Faith to their children.
It is the faith of their father which is more important as he is supposed to be the spiritual head of the family.
Thus, if a Catholic woman marries a Jєω, Muslim, or another non-believer, her children are at danger of becoming infidels.
Do not become unevenly yoked with those who do not practice the True Faith including those who are in the Novus Ordo.