A minor disagreement is one thing, and you're certainly entitled to disagree with your spouse, respectfully, even in the presence of others.  But with a full blown argument it's best to wait until they're out of earshot.  In the heat of the moment, it's difficult, but if you have the ability to mentally count to three, you can prevent those harsh words from tumbling out.  If an argument does erupt, make it quick and then agree to discuss it privately later.  Then, either stage a conflict resolution in front of the kids, or say you're sorry or I regret hurting you or let's agree to disagree.  I always apologize if I've spoken unkindly, though I don't necessarily apologize about the disagreement itself. Not fighting at all, however, gives your children an idealistic, Cinderella view of relationships which is unrealistic.  I especially hate to see girls grow up afraid to disagree.  It's important to model for your children that you can have the courage to disagree and to communicate clearly without malice - and that things can still be okay!