Blended families face unique battles: guilt-paralyzed bio parents, stepparents feeling threatened, ex-spouses overstepping. Ron Deal and Gayla Grace unpack traps that sabotage marriage and parenting—erase/replace mindsets, unilateral fixes, defensiveness—and show how co-parents can lean in, communicate intent, and send “no-threat” messages. When couples unite around kids, check in before ex-decisions, and prioritize long-term child good, hope, stability, and even transformation become possible.