Offer a joke of your own. For men, especially, humor is a way of showing affection. Tolerate things that may be distasteful, as long as it doesn't cause you to sin. Appeal to your spouse's sense of fair play. When it comes to issues involving the children, approach your mate on the basis of what's fair.
Most unbelieving spouses are eventually fair when it comes to their kids.
Pray, pray, pray. The only difference is one of you is saved and the other one is not. But that doesn't make the unsaved any less of a person or less deserving of dignity and respect. On the contrary. I couldn't transform her heart.