My Ex Always Says 'Yes' When I Say 'No'. How to Handle It?

You’re on a speakerphone call, ostensibly about weekend logistics. Your daughter is there, listening. She asks if she can get the new game everyone’s talking about. You say, “Not this week, sweetie, we agreed you’d focus on your science project.” There’s a pause on the other end of the line. Then your ex says, “Oh, go on, let her have it. I’ll pick it up for her on Friday.” Your jaw tightens. In that moment, you are no longer a parent; you are an obstacle. You’re the source of the rules, the enforcer, the “no” in a world where your ex is the easy “yes.” You bite back the words, “Why do you always undermine me in front of her?” because you know exactly where that conversation goes.

This isn’t just a communication problem. It’s a systemic trap, and you’re caught in it. The pattern feels impossible to break because it’s not just about one person’s decision; it’s about the roles you’ve both been assigned. One of you gets to be the Rescuer, the fun parent who swoops in to grant wishes. This forces the other into the role of the Enforcer, the one who has to hold the line and absorb the disappointment. Every time this happens, the roles get more rigid. Your child learns that “No” from you isn’t a boundary, it’s just the first step in an appeal to a higher, more lenient court. You’re not co-parenting; you’re locked in a silent power struggle played out through your child.

What’s Actually Going On Here

The dynamic is self-reinforcing. When your ex overrides your “no,” they get an immediate reward: a happy child and the glow of being the magnanimous one. You get an immediate consequence: a frustrated child and the burden of being the “bad guy.” To maintain any kind of structure, you have to stand your ground, which only makes you seem more rigid and unreasonable in comparison. You become the cartoon villain of consistency while they get to be the hero of flexibility.

This pattern isn’t maintained by malice alone; it’s often kept stable by a deep-seated avoidance of conflict. The parent who says “yes” is often just taking the path of least resistance in that single moment. They want to avoid their child’s disappointment, a potential argument, or the emotional labour of explaining a boundary. For instance, when your son asks for an extra hour of screen time on a school night and you’ve said no, your ex might text back, “Just let him have it, it’s not a big deal.” They’re not thinking about the precedent for next Tuesday; they are optimising for peace right now.

The entire family system then adapts to this instability. Your child learns, quite logically, that decisions are not final and that parents are not a unified front. They become skilled at asking the “right” parent at the “right” time. This isn’t manipulation on their part; it’s a rational response to a system that has taught them that persistence and strategic appeals work. The structure itself incentivises them to play you off each other.

What People Usually Try (and Why It Backfires)

When you’re stuck in this loop, your attempts to fix it are logical. They are also almost guaranteed to fail, because they address the single incident, not the underlying pattern.

• The Appeal to Logic. You try to explain the reasoning behind your decision after the fact. “You know we agreed that a 9 PM bedtime is important for her school performance.” This backfires because the conversation is no longer about the bedtime; it’s about you being right and them being wrong. It reinforces your role as the rigid rule-maker.

• The Direct Confrontation. You call them out on the behaviour itself, usually when you’re angry. “You are always undermining me, and you have to stop.” This immediately puts them on the defensive. They’ll likely respond by justifying their action (“I was just trying to be nice”) or by accusing you of overreacting, which derails the conversation into a fight about your fight.

• The Pre-emptive Agreement. You try to lock down rules in advance for every possible scenario. “Okay, so we’re absolutely clear: no unapproved purchases and screen time ends at 8 PM sharp this weekend, right?” This creates a tense, contractual feeling and often fails at the first moment of pressure. When your ex breaks the rule, it feels like a more profound betrayal, making the subsequent conflict even worse.

• Involving the Child. In a moment of frustration, you explain the dynamic to your child. “I said no, but your father said yes, so now I’m stuck.” This might feel validating, but it puts your child directly in the middle of your conflict, forcing them to manage adult emotions and loyalties.

A Different Position to Take

The way out is to stop trying to control your ex’s behaviour. You cannot force them to be a different kind of parent. The moment you accept this, the strategic goal changes. You shift from trying to build a “united front” with an unwilling partner to building a consistent and predictable front in your own domain.

Let go of the idea that you and your ex must mirror each other’s rules perfectly. Your new position is not about winning the argument or enforcing your will on the other household. It is about creating clarity and stability within your own. You are no longer the Chief of Inter-Parental Policy. You are simply the person who holds the line, calmly and without apology, in the space you control.

This means you absorb the child’s disappointment without blaming the other parent. You let your “no” be a simple, stable fact in their world, not a point of negotiation or a prelude to a fight. The goal is not to make your ex agree with you, but to make your own position so clear and unwavering that it becomes a reliable part of your child’s landscape, regardless of the weather in the other home.

Moves That Fit This Position

These are not lines from a script, but illustrations of how this position sounds in practice. The function of this language is to de-escalate the conflict with your ex and clarify the boundary for your child.

• Acknowledge and Hold. When your child comes to you with the news that the other parent said yes, don’t engage in a debate about it. Acknowledge their reality and hold your own boundary.

  • What it sounds like: “I hear that Mom said you could have the extra screen time at her house. That’s her decision. Here, the rule is that we log off at 8 PM, so it’s time to shut it down for the night.”
  • What it does: It validates the child’s experience while calmly reinforcing your own household structure. It removes the implicit accusation that the other parent is “wrong,” turning it into a simple statement of difference, like having different dinner rules at different grandparents’ houses.

• Name the Pattern (at a Neutral Time). Instead of confronting your ex about a specific incident when emotions are high, find a low-stakes moment to talk about the system itself.

  • What it sounds like: “I’ve noticed we’re falling into a pattern where I end up being the ‘bad guy’ when it comes to rules. I say no, you say yes, and [Child’s Name] is caught in the middle. I don’t think it’s good for any of us. Can we talk about how we can handle those moments so I don’t automatically become the enforcer?”
  • What it does: This moves the conversation from blame (“You did this”) to a shared problem (“We’re in a pattern”). It’s a more collaborative opening and harder to get defensive about.

• State Your Boundary, Not Theirs. Make it clear what you will do, not what they must do. This is about your own action, which you can control.

  • What it sounds like: “Going forward, if a decision like this comes up, I’m going to stick with the original plan we discussed. If you decide to do something different on your time, that’s your call, but the structure at my house will stay consistent.”
  • What it does: It removes the demand for them to change and instead provides a clear, predictable statement of your own future actions. It draws a line around your own authority without trying to police theirs.