How to not badmouth your spouse?

I'm curious as to why you use the term "dysfunctional relationship" Did you marry before the children came, or was pregnancy, not love, the reason for the marriage? As far as not "badmouthing" your spouse in front of the kids, that's simple! I've taught my children to think before they speak! Once the words are out, they can't be taken back! Also, if you cared enough to lay down with your spouse, and create a child, then you should have enough respect for them to choose your words carefully!