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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

AIBU to think I can’t fix the problems in my ex’s blended family?

119 replies

boredwfh · 07/09/2026 12:37

My exH met his current partner around a year after we split. After a string of girlfriends in fairly quick succession, who he thought could all potentially be “the one”, this relationship stuck.
She lived around an hour away from us. They moved in together in her home town quite quickly, were pregnant within a year and now have an 8-month-old baby who my DD absolutely loves.
His DP also has a 6-year-old son from a previous relationship. My DD is 9 and goes to her dad’s most weekends.
The problem is that DD and his DP’s son just do not get on. There is a lot of arguing and fighting and, from what I gather, it makes family time when DD is there an absolute nightmare. DD says she finds him annoying and has also expressed some jealousy that he gets to spend more time with her dad during the week than she does. Her dad now lives an hour away, so seeing DD during the week isn’t really practical.
DD is happy with the custody arrangements and wants to see her dad. She just doesn’t like his DP’s son.
It has now got to the point where, if DD and the 6-year-old are there at the same time, they sometimes do completely separate activities to keep them apart. They recently went on holiday together and apparently it was a nightmare because of the constant fighting and arguing.
Obviously I speak to DD about her behaviour. I tell her she needs to be kind, patient and to ignore him if she feels he is deliberately winding her up. I don’t tell her it is acceptable to argue or fight with him.
My ex now wants me to do more to resolve the situation and has suggested a meeting between him, his DP, my DP and me to discuss it.
The problem is, I genuinely don’t know what more I can do from my house.
DD also lives in a blended family here. My DP has two daughters, although they are young adults so obviously the dynamics are very different. DD adores them and gets on extremely well with my DP. We simply don’t have the behavioural issues here that her dad describes.
My ex and I don’t particularly get on and I have never met his DP. If I genuinely thought sitting down together would help DD, I would do it. I just can’t see what this meeting is actually going to achieve.
Last year, my ex tried to attribute DD’s behaviour at his house to her bedtime at mine. He was demanding that I put her to bed earlier because he believed tiredness was causing her to misbehave at his house. Yet I wasn’t experiencing the tantrums or behaviour he was describing here.
I was very much the default parent when we were together and he struggled with discipline and managing her behaviour then too.
I strongly suspect the actual problem is the family dynamic at his house. You have two fairly close-in-age children who don’t like each other, who didn’t choose to become a family, and who are now expected to spend most weekends together. Add in DD potentially feeling displaced because this child gets to live with her dad full-time, plus a new baby, and I can understand why there are difficulties.
But I don’t know what I can realistically do about that from my household.
So AIBU to decline the meeting and tell my ex that, while I will continue to talk to DD about her behaviour and expectations when she is there, the dynamics within his household are something he and his DP need to manage?

OP posts:
Millytante · 07/09/2026 21:32

Netcurtainnelly · 07/09/2026 13:43

What a shame for all the kids. All these different siblings and half siblings from relationships

Why do people keep having kids every time they meet someone?

I think the least they might do is ALL live together, commune style. Then little kids might not feel they were losing a parent, nor being supplanted by new children.
(I’m serious, if only suitable accommodation would ever support this! )

Holeymoley28 · 07/09/2026 21:31

Minasama · 07/09/2026 21:27

So her daughter isn’t her problem then.

Her daughters behaviour in the other parents house isn’t her problem when she behaves fine with her mum.

Its 100% a dad problem.

Minasama · 07/09/2026 21:27

Iamuhtredsonofuhtred · 07/09/2026 12:39

This is so not your problem

So her daughter isn’t her problem then.

Whyherewego · 07/09/2026 21:20

I'd literally just repeat to your ex what the PP said ie "I am not there to see the dynamics and as I said I have not experienced these behaviours at my house. I have also no experience of juggling parenting with a 9, 6 and new born so I have no suggestions to help you but I am sure that you and your DP will figure it out. "

boredwfh · 07/09/2026 21:09

Vulpini · 07/09/2026 20:22

Have you asked your DD if she’d prefer to go every other weekend? She should get a say in this.

Yes I have and she’s said she wants to go every weekend as she doesn’t want to miss out on time with her dad.

OP posts:
Fern26 · 07/09/2026 20:53

You have spoken to your daughter and that’s all you can do. Dad sounds like he is trying to pass the buck and get you to sort it.

What ever house your daughter is naughty in the parent that deals with it. Dad’s house is the issue so Dad sorts it.

Your daughter is fine at your house so don't agree to any sanctions that Dad says. Your house your rules and you deal with behaviour in your house how you see fit.

Guarantee Dad is pissed off as he looks like a shit parent in front of new partner and is having to step up more which is hard work! Welcome to being a parent.

MeetMeOnTheCorner · 07/09/2026 20:51

Most courts don’t agree every weekend with one parent. Weekends should be shared 50:50. So every other weekend, DD is at home. Do these kids not go to parties, join regular activities or see friends on a Saturday. It’s just dividing the child in two to suit parents.

Lmnop22 · 07/09/2026 20:43

boredwfh · 07/09/2026 20:09

I am concerned, I’ve had conversations with her, advised her to be kind, patient, ignore him if he’s winding her up etc. But what exactly am I meant to do? As the poster above said, I’m not there to see the dynamics & what’s really happening, and when she’s with me we don’t have any issues like this.

Not spend every weekend without your own DD for an easy life and actually take back control over who she spends time with and her wellbeing??

PropertyD · 07/09/2026 20:33

Netcurtainnelly · 07/09/2026 13:43

What a shame for all the kids. All these different siblings and half siblings from relationships

Why do people keep having kids every time they meet someone?

I 100% agree with you.

Vulpini · 07/09/2026 20:22

boredwfh · 07/09/2026 13:12

My daughter does really like weekends with her dad, if my ex has something he wants to do I’ll have her extra weekends. Also if I want to do something with her I do ask to have her for a weekend so I can do those things. The 50/50 thing is definitely all about maintenance as another PP said. But I fear if I stop her going every weekend and only every other weekend, that my DD will feel even more pushed out & this would upset her more. She enjoys time with her dad, just she hates this little boy. It may be as they both grow up the situation improves. But again it’s out of my hands.

Have you asked your DD if she’d prefer to go every other weekend? She should get a say in this.

Minasama · 07/09/2026 20:21

No, you should go to the meeting and express the view that your daughter deserves quality time with her father unencumbered by his partner’s son. You and he should be putting her needs first.

I’m afraid I feel angry at your passive stance and very sorry for your poor daughter. Why should she have to put up with an annoying six year old after her parents failed to maintain a nice family home for her? At least you could both sort this out for her, poor kid.

Holeymoley28 · 07/09/2026 20:17

He wants the meeting to blame you when it’s just he can’t get his own house in order.

He moved an hour away to live with another man’s child and only sees her weekends. While also blaming her mother (you) everytime something makes him unhappy.

Because heaven forbid the boy who is apparently winding her up and being annoying be taught to leave her alone but then that would be putting blame on his latest partner who of course he needs to keep sweet to keep his bed.

Besidemyselfwithworry · 07/09/2026 20:12

Iamuhtredsonofuhtred · 07/09/2026 12:39

This is so not your problem

I agree
they need to manage this
maybe your daughter goes every other weekend to her dads when his DP’s son is at his Dads?

toottoot3 · 07/09/2026 20:10

You know your going to get the blame, so bring an outsider, a child therapist, advocate, whatever you think. Sit back, let them ask the questions, answer honestly, she's fine at your house, problem is at dads. Offer lots of different alternatives which suits your daughter and you, he can knock them all back if he wants, he still will have issues in his house, until he deals with them. You could point out his need for 50/50 is maybe not suitable for just now and the child's needs are more important. Don't deal with his problems, just yours and daughters, help facilitate what good for her only, not his new family

boredwfh · 07/09/2026 20:09

Quitelikeit · 07/09/2026 19:54

Sounds like she’s playing up and you don’t seem that concerned.

You should be concerned because if my child was being a nightmare I’d want it resolved asap. Not for his sake but for my child’s sake.

I am concerned, I’ve had conversations with her, advised her to be kind, patient, ignore him if he’s winding her up etc. But what exactly am I meant to do? As the poster above said, I’m not there to see the dynamics & what’s really happening, and when she’s with me we don’t have any issues like this.

OP posts:
Quitelikeit · 07/09/2026 19:54

Sounds like she’s playing up and you don’t seem that concerned.

You should be concerned because if my child was being a nightmare I’d want it resolved asap. Not for his sake but for my child’s sake.

Feralbookworm · 07/09/2026 19:42

You can’t get involved because you aren’t there to see the dynamics. So it would be unfair to put you in the middle of something on his hearsay alone. And let’s be honest if his dp is there they will never admit that their child is doing anything wrong either. Kids will be kids but maybe she has a point, maybe his mum believes he does no wrong and she gets blamed for every little thing, this is going to built so much resentment with her and she will end up despising him.
maybe there is a bit of jealously there that he sees her dad more than she does but that’s up to your ex to spend time with her when she’s there. Is he constantly nit picking at her? Does he always take his dp sons side? There’s so much to take into consideration and you are absolutely not responsible.

FrippEnos · 07/09/2026 19:25

Its been said but surely the easist solution is for your DD to go to her Das's when the other child isn't there.

Then try again once the children have matured a bit.

SixAndJuliet · 07/09/2026 18:46

I’d go to the meeting. It probably won’t help but if it did then it would result in my DD being happier more often.

Grumpyoldcat · 07/09/2026 18:32

They need to give you a bit more info here. How do they end up falling out? Who tends to instigate? Your DD is only 9 and it must be really hard for her. Dont think a meeting would achive anything at all so YANBU. He needs to be a parent and sort this out as it is happening on his watch. He sounds like he wants it all to be sweetness and light but is deluded and seeking to blame you. Stay out of it!

AmnesiacsDream · 07/09/2026 18:31

You could respond with something like

I have plenty of ideas for how you could change what you're doing to help alleviate things if that's what you're after, though think it might go more smoothly if you had a session with a professional parenting coach instead. As I've said, we don't have difficulties with DD's behaviour at our home and we don't encourage poor behaviour at your home, so if this isn't about asking for our advice, I'm not sure what the meeting would be about.

Pinkflamingo10 · 07/09/2026 18:26

I would meet him only with a family mediator present. If you don’t agree to meet then you may be accused of not wanting to work together in co-parenting.
lots of people saying not your problem but actually it is because it involves your daughter. It is not your fault though.
as things are obviously bad enough for your exH to ask for a meeting, I think it’s worth changing things for your daughters sake, and trial sending her there only on the weekends and holidays that the boy is not there. Just so they have a wee break from each other. Then introduce back one weekend a month at her dad’s with the boy present. No more. Until they’re able to cope with that one weekend a month together.

MeetMeOnTheCorner · 07/09/2026 18:24

Ex needs to listen to his partners DS too! He’s no doubt unhappy for a reason.

Error404FucksNotFound · 07/09/2026 18:09

I would argue that your daughter's clear unhappiness makes it your problem.

I would sit down and discuss it. Not to lay blame but to try to work together for the benefit of the children. In a neutral location. With a mediator.

iwishitwouldstartraining · 07/09/2026 18:06

If they were brother and sister, at those ages, it is possible that they would also be sworn enemies.

Your ex needs to have realistic expectations.

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