In the heat of an argument, most people don't think long-term. Their focus is on surviving the situation at hand. Second marriages have a higher risk of divorce than first marriages. When couples divorce, each brings into a second marriage the same negative character traits he or she had in the first marriage. In other words, wherever you go, you bring yourself with you.
Blended families create problems often worse than the problems of the original marriage and family.
Each parent has a natural tendency to favor his or her own offspring. This results in conflict between the parents and among the children. On top of this, there is the problem of the ex-spouse who usually remains in the picture as a parent to one set of children. This can make for very difficult and uncomfortable situations both for the new spouse and the new children. The effect of divorce on the children involved has life-long repercussions.