Co-parenting with a high-conflict ex can be challenging under the best circumstances. However, when one parent engages in coercive behavior, the dynamic can shift from difficult to deeply destabilizing. One of the most common and often overlooked strategies used in these situations is isolation. Isolation is not always obvious. It rarely begins with overt demands or clear ultimatums. Instead, it tends to develop gradually through patterns of behavior that erode support system

In high-conflict co-parenting situations, children are often caught in the middle of their parents’ disputes, leading to complex...