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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

AIBU to Be Angry With Co-Parent’s Partner?

255 replies

SnowyPolarBear9 · 09/04/2026 11:51

For context; same sex parents to one child. Co-parent is now with someone else (also same sex) and they’ve been together for approx 4 1/2 years.

My 9yo son recently told some fibs about co-parent’s partner suggesting/recommending films and series to him that were age rated 12 and 15. The rule is with me that if something has an age rating, he’s not allowed to watch it until he is 1 year younger (e.g age rating 12 he can’t watch until he’s 11).

Our son was spoken to by both of us (parents) about the situation and the seriousness of telling fibs etc. However my son has later told me that co-parent’s partner spoke to him on the phone about it, and said she wouldn’t be seeing him for a number of weeks because of the fibs he had told and that he had to stop them for her to see him again.

AIBU to be fuming with this? 😡

Firstly, for anyone to impose this type of punishment where they refuse to see the child I find absolutely disgusting. But she’s also not a big part of his life, co-parent and her partner don’t live together and the time co-parent’s partner spends with/sees my son is minimal. In the 4 and 1/2 years she’s been around, I think he’s spent overnight with her once.

I’m so upset by this as based on their dynamic and admittedly low-involvement relationship, I just don’t appreciate her “punishing” him. Plus, even if it was someone extremely close to him, I’d be appalled at such a cruel approach!

I’m trying to draft a message to the co-parent about it but I just can’t get my thoughts out properly in writing and I also want to know if I’m being unreasonable!

Thanks in advance 🙌🏻

OP posts:
BudgetBuster · 09/04/2026 14:05

DoubleWobble · 09/04/2026 13:59

Massive weird overreaction all round. Who cares if she recommends a film with an adult rating to a kid she barely sees? It’s the parents’ job to keep the devices locked down. Knowing the name of an 18 film isn’t going to harm him?

Have you missed the entire plot of the thread?

Anonymouse27 · 09/04/2026 14:05

Why does your son say he did it? Is he aware how much you dislike ex's partner and trying to be Team Mum by saying bad things about her too?

Elanol · 09/04/2026 14:07

Someone my parents knew had his life destroyed by a very serious lie. Having seen this happen in real life, I'm not surprised the other partner is taking a step back. Perhaps the communication could have been handled better but they are right to protect themselves.

99bottlesofkombucha · 09/04/2026 14:10

Greenandyellowday · 09/04/2026 13:47

What if the little boy wasn't lying? It's a possibility is it not? Maybe he and co-parent's partner had been chatting about their favourite TV shows. Maybe he thought by mentioning to you that she thinks whatever shows are great/cool, he might be allowed to watch them.
Her having a private phone call with your nine year old, saying "I can't see you if you tell fibs" I have to say I find creepy. Gives me an emotional blackmail vibe. I wouldn't like this one little bit.
Any conversation about how she's feeling should be with her partner and you: the adults in the room.
And I think any consequences for telling lies, if indeed he did lie - whether it's no TV for a week, or whatever - should be explained to him and meted out by the co-parents, not the partner.

He’s said he lied. Do you mean you think it more likely he’s lied about lying about what the partner said than that he lied about what the partner said then admitted it?

Elektra1 · 09/04/2026 14:13

Given that your son has shown a propensity for lying/manipulating the co-parenting situation, are you sure that what he’s said to you about the latest development from co-parent’s partner is 100% true? I would tread carefully and on the basis that he might have (a) made it up entirely or (b) misrepresented what was actually said, and approach the co-parent together with her partner on a more collaborative “this is what he’s said, what can we do about it?” basis.

As others have said, the co-parent may well be concerned that the lies about her might escalate in severity. That can be devastating. I’ve seen it happen in my own family. I’d try to keep co-parent and partner on board in this situation, rather than put yourself into an adversarial position.

I am also a gay parent, and my ex-wife lives with her partner (whom she left me for). We have one child together and her new partner has 2 of her own kids. There have been some instances of bad behaviour/lying between the kids (about each other) and I’ve found it much easier to resolve by dealing with my ex and her partner as though we are simply the 3 parents who all want the best for all 3 kids, rather than coming out fighting only for my kid.

Springspringspringagain · 09/04/2026 14:13

There are only two parents here: you and the co-parent. The only ones that should be parenting your child are you two. She/he should not be texting them or withdrawing anything; all parenting should be done by parents and not other people.

I wouldn't get into the whole lies/justifying yourself thing, children do lie, especially when stressed or confronted or just because- your child already has to deal with two households, a third set of rules is just so confusing which is why only two parents should be involved. Make sure any partner to either of you isn't communicating separately and that all parenting decisions go through you two.

GreyCarpet · 09/04/2026 14:13

I just feel that any repercussions should be enforced by his parents and not someone that doesn't have an active, consistent role in his life.

OP, this isn't a punishment. She isn't enforcing a repercussion. She is setting a boundary.

She is acting to protect herself. This is separate from, not in addition to, any punishment you and your ex deem appropriate.

If a child lied about me, I wouldn't care what punishment the parent put in place. The best guarantee I'd have of it not happening again (or easily proving it were a lie if it did), would be if I could prove I'd had absolutely no contact with the child in the first place.

Whether the parent agreed with me or not would be irrelevant.

DoubleWobble · 09/04/2026 14:15

LiviaDrusillaAugusta · 09/04/2026 14:01

But she didn’t. I don’t think it’s an overreaction to not want to spend time with a child who is prone to telling very spiteful lies about adults.

But why all the furore in the first place? I have definitely discussed Stranger Things with my seven year old SD (she has a Stranger Things teeshirt that she chose!), who cares?

All the adults here are overreacting. The stepmum has clearly decided she can’t be bothered to be part of the circus and it’s easier just to not see the SS. Fair enough!

BudgetBuster · 09/04/2026 14:15

Springspringspringagain · 09/04/2026 14:13

There are only two parents here: you and the co-parent. The only ones that should be parenting your child are you two. She/he should not be texting them or withdrawing anything; all parenting should be done by parents and not other people.

I wouldn't get into the whole lies/justifying yourself thing, children do lie, especially when stressed or confronted or just because- your child already has to deal with two households, a third set of rules is just so confusing which is why only two parents should be involved. Make sure any partner to either of you isn't communicating separately and that all parenting decisions go through you two.

It wasn't a parenting decision... or a 3rd set of rules

It is a woman protected herself from the lies of a child

DoubleWobble · 09/04/2026 14:18

BudgetBuster · 09/04/2026 14:05

Have you missed the entire plot of the thread?

I’ve missed why OP’s frothing about someone talking (or not talking) about Stranger Things… It’s a major cultural reference. It’s not like she’s recommending OnlyFans channels, is it?

MajorProcrastination · 09/04/2026 14:20

I don't think I'm mad at her. It's good that she communicated her upcoming absence to your child so he doesn't start worrying and imagining her never being around again and blaming himself. I can also see maybe there's an element of protection, if she's not around and out of contact with him he can't make up any more fibs involving her. Maybe it works as a cooling period. Or was it perhaps something that was agreed between the co-parent and their partner? Like a "maybe it's best for a few weeks if I just have (child's name) on my own and we'll see each other on other days of the week", which is easy enough to do if they don't live together.

It's good that the lie was found out and this person didn't get a barrage of grief for allowing your child to watch or read something age inappropriate AND that your child hasn't accessed any media or books that aren't suitable. But I'd be curious about why the lie happened.

outerspacepotato · 09/04/2026 14:21

Not seeing him is a boundary your ex's partner has set for her own protection. He can't falsely accuse her of anything if he's not around her.

You should be angry at your child for lying and trying to get his other parent's partner in the shit. You should all be presenting a united front on this. Present this to your son as when he lies about people, they won't want him around. That's the consequence of his lying.

SuckerForBread · 09/04/2026 14:21

should’ve just done this quietly in the background and let his parents deal with the punishment/repercussions as it’s not her place

another perspective here from a step parent, to two children whose mum also used to exert her presence in our home through the creation of rules that had unexpected outcomes.

At some point this child could well be in the care of this person. On their own. If they’re together for years, it’s likely your ex at some point needs help with child care or needs to nip to the shop, or has an emergency they have to leave to deal with.

It is really important that a child still sees that person, in charge of caring for your child, as having a degree of authority. It’s really important they feel able to take up their space as someone who is looking after that child.

It is entirely their place, to set and give boundaries, and explain consequences for boundaries when they are not met.

I’ll give you an example - my step child’s mum said to youngest ‘you must never go into the bedroom when suckerforbread is there’. And I understand exactly why, and for my own privacy I don’t really want them wandering in when I’m getting dressed and seeing more than either of us would like.

But that meant when that child woke up at 6am throwing up furiously all over their bedroom, they wouldn’t even sit on our bed, because I was there. So it’s 6am, there’s sick all over the floor and the bed, and the child continues to just stand there crying in a puddle of sick. We were at this point, three years in.

At four years in, I collected the child from school. He had been bullied, physically and mentally, he was crying, overwhelmed, upset and I’m alone at home with him. Both parents are at work 30 minutes away. I tried to console, and it’s very much a case of ‘mummy told me I’m not to touch you’.

okay so now we have a crying, upset child who isn’t calming down, who is in my care, and what can I do about it?

this goes on and on, the time I asked him not to jump on a frozen river, the time I asked him not to stroke dogs without asking the owner if that’s okay, the fact he wouldn’t hold my hand as we crossed a busy road and I had to pull him back from being hit by a car by his hood.

Be careful what you say to your kid, because it has a lasting impact and sometimes quite far reaching consequences, that you don’t understand the reality of purely because someone did something, in a place you don’t control, in a situation you weren’t in, that you’ve taken umbrage with after the fact.

the sensible thing for you to in this situation is to use it as an opportunity to teach your child. ‘mummy and mummy love you unconditionally and we forgive your lying but other people are not as quick to forgive and forget. When you tell lies people won’t always want to be around you as they then feel they can’t trust you. That’s why it’s important you tell the truth’. ‘Telling lies can get people in trouble, and it can also cause you hurt - what if you’d watched a film that gave you nightmares?’

what has happened could be a great learning opportunity for your child around boundaries, if you would just see past the fact that they did something you didn’t like.

they’re going to do a LOAD of stuff you don’t like - they’re not you - use it to your child’s advantage.

PoppinjayPolly · 09/04/2026 14:22

@Springspringspringagain She/he should not be texting them or withdrawing anything
you also think the partner isn’t entitled to withdraw herself from contact with the son? She should be forced to have contact? 🤨

Cosyblankets · 09/04/2026 14:23

SnowyPolarBear9 · 09/04/2026 13:44

Thanks everyone for the replies.

Admittedly I hadn’t considered my ex’s partner being worried about any potential future or worsening lies so I do fully take that on board as I would feel the same. However I just can’t accept that she has gone out of her way to communicate with him that she won’t be seeing him for a while, as others have agreed, she should’ve just done this quietly in the background and let his parents deal with the punishment/repercussions as it’s not her place.

I just feel that any repercussions should be enforced by his parents and not someone that doesn't have an active, consistent role in his life.

For those that have commented on my “poor” parenting; the post doesn’t mention anything about my parenting. So this is just a ridiculous (and hurtful) assumption!

Yes the lying has been dealt with by parents I’m unsure why some replies have suggested that it hasn’t been when again, this wasn’t in the OP.

My son did admit to lying about the age rated content being suggested to him and yes he’s been very upset about it. Just for clarification, it wasn’t anything majorly explicit (the main one was Stranger Things and the other one was Death Of A Unicorn which I think is a 15). I appreciate everyone has different rules when it comes to age ratings on games/films and so on, but allowing him to watch things 1 year before he hits the age rating is just my rule and what I feel is appropriate as a parent. Not sure why I’m being told this is ridiculous 🤷🏼‍♀️ I’m sure if I said I allow my 9yo to watch 15s that I’d be reprimanded for that too 🤣

But what were the repercussions?
You said you'd spoken to him.

Trusttheawesome · 09/04/2026 14:24

I wouldn’t be around him either. It can be very very dangerous for step parents when their step kids starting telling lies about them. What lies will he come up with next?

I wouldn’t put myself into any position that allowed your son to come up with more lies. Deal with your kid’s behaviour.

BudgetBuster · 09/04/2026 14:25

DoubleWobble · 09/04/2026 14:18

I’ve missed why OP’s frothing about someone talking (or not talking) about Stranger Things… It’s a major cultural reference. It’s not like she’s recommending OnlyFans channels, is it?

The OPs post is about whether it was reasonable for the other parents Partner to tell the 9yo that she wouldn't be around him until he stopped telling lies about her or not.

The stranger things plot isn't relevant and is just a fluffer in the thread.

Trusttheawesome · 09/04/2026 14:27

@SnowyPolarBear9

Oh, and we don’t have 12s anymore. They are 12A, which means they can be watched by younger kids with adult guidance and they are mostly really mild. I don’t know any 9 year old’s who haven’t seen iron man, for example. You’re being really weird and sounds like he is going to be mollycoddled.

Toober · 09/04/2026 14:44

Why is it not her place when the lies were about her? She hasn't stepped in when your child has refused to finish his dinner or tidy his room.

Shypinkpiggypants · 09/04/2026 14:49

You mean your ex’s new girlfriend???

ChillingWithMySnowmies · 09/04/2026 14:50

SnowyPolarBear9 · 09/04/2026 13:44

Thanks everyone for the replies.

Admittedly I hadn’t considered my ex’s partner being worried about any potential future or worsening lies so I do fully take that on board as I would feel the same. However I just can’t accept that she has gone out of her way to communicate with him that she won’t be seeing him for a while, as others have agreed, she should’ve just done this quietly in the background and let his parents deal with the punishment/repercussions as it’s not her place.

I just feel that any repercussions should be enforced by his parents and not someone that doesn't have an active, consistent role in his life.

For those that have commented on my “poor” parenting; the post doesn’t mention anything about my parenting. So this is just a ridiculous (and hurtful) assumption!

Yes the lying has been dealt with by parents I’m unsure why some replies have suggested that it hasn’t been when again, this wasn’t in the OP.

My son did admit to lying about the age rated content being suggested to him and yes he’s been very upset about it. Just for clarification, it wasn’t anything majorly explicit (the main one was Stranger Things and the other one was Death Of A Unicorn which I think is a 15). I appreciate everyone has different rules when it comes to age ratings on games/films and so on, but allowing him to watch things 1 year before he hits the age rating is just my rule and what I feel is appropriate as a parent. Not sure why I’m being told this is ridiculous 🤷🏼‍♀️ I’m sure if I said I allow my 9yo to watch 15s that I’d be reprimanded for that too 🤣

As a co-parent.. you need to talk to your Ex about how you feel and let them deal with it. It isn't your place to reprimand her partner.

BudgetBuster · 09/04/2026 14:50

Shypinkpiggypants · 09/04/2026 14:49

You mean your ex’s new girlfriend???

Of 4.5yrs... not sure when the "new" title ceases

Unexpectedlysinglemum · 09/04/2026 14:52

I’m not surprised she wants to protect herself from further allegations I’d do the same, but I wouldn’t tell child directly I’d let his parents communicate that to him. I wouldn’t be alone with him again in her shoes.

Lomonald · 09/04/2026 14:54

Shypinkpiggypants · 09/04/2026 14:49

You mean your ex’s new girlfriend???

Well the ex has been with her girlfriend for 4.5 years , so not exactly new.

YerMotherWasAHamster · 09/04/2026 14:54

She does right to remove herself but I disagree with her contacting the child herself. The child should have been told this by a parent. If she had been a big part of the child's life that would have been different and her telling the child herself might have been appropriate.

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