Co-parenting with a partner who has narcissistic personality disorder (NPD) can be exhausting due to their need for control, lack of empathy, and disregard for boundaries. Narcissists often resist feedback, parent inconsistently, and prioritize their desires, making collaboration difficult. To manage this dynamic, it's essential to accept that your partner is unlikely to change. Set clear boundaries and stick to them, create a detailed parenting plan, and rely on written communication to avoid unnecessary emotional stress. Stay calm during conflicts, avoid personalizing insults, and maintain perspective—recognizing that their behavior reflects them, not you.