Parenting can be hard. Between sleep deprivation, temper tantrums, and strong-willed personalities, it's not always easy to know what to do. Our partners in this parenting journey deserve to be treated with respect and trust, even through fits of anger. There are a few things that under no uncertain circumstances should you say to your coparent, even if you really, REALLY want to. Your relationship, and your kids, will be better off if you avoid these 10 harsh phrases altogether.