Co-parenting with a narcissist usually isn't traditional co-parenting — it's managing an ongoing source of conflict while protecting your kids. The strategies that work: parallel parenting instead of cooperation, business-only communication (gray rock + BIFF), documenting everything, and being the steady, safe parent. You can't control them; you can control your responses and your home.
Standard co-parenting advice assumes two people acting in good faith. With a narcissistic ex, trying to cooperate often just hands them new ways to control you. The shift that helps most is from co-parenting to parallel parenting.
Keep every message gray rock and BIFF (Brief, Informative, Friendly, Firm). No emotion, no bait, no JADE. Co-parenting apps timestamp and preserve everything, which both protects you and discourages them.
Missed exchanges, last-minute changes, boundary violations, concerning things the kids report — log them factually with dates. This record matters if custody is ever contested. Unmasked's Evidence file is built for exactly this.
Parallel parenting is a low-contact arrangement where each parent handles their own time with the children independently, with minimal direct coordination — usually through a written channel or app. It's designed for high-conflict situations where cooperative co-parenting isn't safe or possible.
Don't bad-mouth or disparage — it harms kids and hurts you in court. Instead, be honest in age-appropriate, non-attacking ways, validate what they feel and see, and be the steady, safe parent. A child therapist can help.
Move everything to a single written channel or co-parenting app, reply only to logistics using BIFF, and don't engage bait or re-litigate the past. Document the pattern. Less surface area means less conflict.