“For the unbelieving husband is sanctified (set apart) by the wife (believing), and the unbelieving wife is sanctified (set apart) by the husband; else, were your children unclean, but now are they holy (set apart).-1 Cor 7:14
The chidren are set apart by the believing parent, whether one or both. As the children are brought up in the gospel the affect is they are set apart. Set apart whether they have understanding or not. But the will of parent cannot call down God’s grace, for grace is solely a matter of God’s will.
“But as many that receive Him (by grace and the will of God), to them gave He power to become the sons of God, even to them who are faithful to His name, which were born not of bloods, nor of the will of the flesh, nor of the will of man, but of God.”-John 1
And at the appropriate time if it be God’s will the children will be dipped in Yeshua’s name. For just as what man can determine water for a person, what man can forbid a person the water of dipping in Yeshua’s name.
There is no infant baptism or baptism determined by the parents, or blood, or the flesh, or any person. There is only dipping in Yeshua name when God makes choice.