1 Cor. 7:12-14 (ESV)
To the rest I say (I, not the Lord) that if any brother has a wife who is an unbeliever, and she consents to live with him, he should not divorce her.  If any woman has a husband who is an unbeliever, and he consents to live with her, she should not divorce him.  For the unbelieving husband is made holy because of his wife, and the unbelieving wife is made holy because of her husband. Otherwise your children would be unclean, but as it is, they are holy.
It seems these days that more women are married to unbelievers than there are men married to unbelievers. It doesn’t always make for the easiest marriage. When kids come there is always a question of where they will go to “church.” Sometimes it isn’t hard, especially if the husband is one of those self described non religious types. Maybe your spouse just doesn’t care to go to church with you, and would rather sleep in on Sunday morning. But then maybe your spouse belongs to a different faith, and is in that way an unbeliever, and maybe they take it very seriously. Maybe so seriously that the only way to preserve the marriage is by going to “church” where they go to “church.” Love doesn’t ask someone to forsake God. That is plain and simple. A spouse who demands that you renounce Christ, or stop going to church, is not a spouse that consents to living with you, for you are Christ’s, first and foremost. That is an abusive spouse of the worst kind. It is hard, but Christ does not give us the option in this world of putting family before him. This is what he meant when he said he did not come to bring peace but a sword and turn father against son…. But if the spouse does consent to live with you, then stay with your spouse, and love spouse, as Christ loves you and your spouse.