How Do I Deal With My Partner's Ex Withholding Information About the Kids?

She's not forgetting – she's choosing not to tell him. Here's what's really happening when your partner's ex withholds information, and what you can actually do about it.

Your partner finds out about the doctor's appointment after it happened. The school event he didn't know about until it was over. The medication change nobody told him about. This isn't disorganisation. When your partner's ex withholds information about the kids, it's a control tactic – and once you see it for what it is, you can stop trying to fix the wrong problem. The strategy isn't to get her to cooperate. It's to remove her leverage entirely.

Why withholding information is a control tactic, not a communication problem

Information withholding isn't forgetfulness. It's not that she's too busy. It's deliberate.

With high conflict people, if they control the information, they control the story. And they always need to control the story. By controlling what your partner knows, she gets to maintain her role as the primary decision-maker – the one who knows, the one who matters.

She can use it to paint him as uninvolved or incompetent. She uses it as evidence that her story about him is true – that she's the reasonable parent and he's the problem.

He looks like he's not showing up. She looks like she's holding everything together. And that's exactly what she's going for.

How she engineers the situation so she always looks innocent

High conflict people don't just withhold information – they engineer uncertainty. And there's always an explanation for why she's completely innocent in each situation.

She says nothing at all, then later: "I assumed you knew." She shares information hours before an event when he can't reasonably respond. Technically she told him. Practically, it's useless. She buries the key detail inside a huge emotional message full of blame and accusations – easy to miss, easy for her to say later: "I told you. You just weren't paying attention."

The tactics change, but the outcome stays the same. Your partner doesn't have the information he needs. He looks uninvolved. She looks responsible.

That's the pattern you're looking for.

What can I actually do as a stepmum when she won't share information?

One of the things about being a stepmum in this situation is that you can see things from the outside. You can see the patterns – things that are hard for your partner to see when he's in it every day.

Start by helping him see the pattern on paper. Not how she's doing it, but the outcome. A simple sheet with dates, the situation, and the outcome. Because when you track it, it becomes pretty undeniable. And if he can't see the pattern, he'll keep treating each incident as isolated – always reactive, never proactive.

Then help him accept that expecting cooperation from her will never work. Whatever he's been doing so far hasn't improved the situation. Because the problem isn't the situation – it's her. And she's not going to change.

Once you've got understanding and acceptance, the rest is just strategy.

And your role in this strategy is up to you and your partner, but I do want to preface this by saying - you're not responsible for his coparent relationship, but you can support him. Just remember to look after you. If you need a refresher on supporting your partner without burning out, check out my Episode 23.

And if supporting your partner through all of this is starting to cost you, [INTERNAL LINK: How to Support Your Partner Through Toxic Co-Parenting Without Burning Out – "this episode on supporting him without burning out"] is worth a listen.

The strategy that actually works: remove her leverage

The goal isn't cooperation. It's removing leverage. Here's how.

Stop chasing missing information. Every follow-up message confirms she controls the timeline and gives her the emotional payoff she's looking for. Ask once, in writing, then stop. Chasing rewards the behaviour.

Shift from requesting to recording. Instead of asking again, your partner sends a message that documents the facts and how he's proceeding. "If I don't receive school information, I'll assume there are no changes." "If I'm not informed of medical appointments, I won't be able to attend." He's no longer waiting on her – and withholding information no longer gives her leverage.

Create a direct line to the source. Direct contact with teachers, school portals where both parents get notifications, medical practices that list both parents as contacts. The less information flows through her, the less power she has.

Keep communication predictable and boring. High conflict people escalate when they hear emotion or anything that sounds negotiable. Responding neutrally and factually, every time, removes the emotional payoff she's looking for.

If you're second-guessing every message you send her, the [OFFER LINK: No Drama Script Pack – "No Drama Script Pack"] has a full script library plus the [OFFER LINK: No Drama Responder – "No Drama Responder"], a custom GPT that helps you create specific responses to her messages.

Expect a temporary escalation when he starts using these strategies. Angrier messages. Accusations. That's normal – it's her trying harder because the old behaviour stopped working.

FAQs

Q: What do I do when she withholds important information about the kids?

A: Ask once, in writing, then stop. Shift to documenting how you're proceeding based on what you know. Create direct lines to schools and medical practices so information doesn't have to flow through her. The goal isn't to get her to share – it's to make her withholding irrelevant.

Q: How do I know if she's doing it on purpose or just being disorganised?

A: Look at the outcome, not the excuse. If the result is consistently the same – your partner doesn't have what he needs, she looks responsible, he looks uninvolved – that's not disorganisation. That's a pattern. Track it on paper and it becomes pretty hard to explain away.

Q: Should my partner keep asking her when she doesn't respond?

A: No. Every follow-up message confirms she controls the timeline and gives her the emotional payoff she's looking for. Ask once, factually, in writing. If there's no response, document how he's proceeding and move on. Chasing actually rewards the behaviour.

Q: What do I do when she tells everyone except my partner?

A: This is deliberate. The fix isn't to get her to include him – it's to build his own direct lines. Schools, doctors, therapists – anywhere information originates, he should be listed as a contact. That way he's not dependent on her to pass anything on.

Q: Is there anything we can do legally when she withholds information?

A: Sometimes. If information withholding is severe – especially involving medical decisions, safety concerns, or repeated breaches of a court agreement – it shouldn't be something you manage alone. Document everything, make sure your reality is provable, and get legal advice before you're in crisis. Legal protection works best when it's already in place.

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Information withholding isn't a communication problem you can solve by communicating better. It's a control strategy – and the only thing that works is making her control irrelevant.

Help your partner build his own network, document the pattern, and stop organising your life around her cooperation.