My DH and I have been together four years and married almost two of those. He has three sons, ages 12, 14, and 17 and I have two girls, ages 11 and 13. When we were dating, we waited quite a while before introducing each other to the kids, or to each other, and tried to be thoughtful about everyone getting to know each other well before we got engaged, etc. We also discussed our approaches to parenting and that we intended to coparent the children together. We even went...