I've been married for twelve years, and I'm starting to think that staying together for the kids does more harm than good. My husband and I haven't been happy for a while, and the tension at home is palpable. Research shows that children in high-conflict households suffer more than those in separated families, but I still worry about the stigma and the practical difficulties. Would you stay in an unhappy marriage for the kids, or would you leave for everyone's sake?