This is a great article about how not to coparent. These parents do what is called parallel parenting. To parallel parent effectively, you do not have to like one another, be friends, talk, or plan. You must, however, TRUST that the other parent has the best interests of the kids at heart. That does not mean you will agree with everything the other parent wants to do or not do but it means you can live with it AND you know your kids safety is not in jeopardy.