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Step-parenting

Connect with other Mumsnetters here for step-parenting advice and support.

Help with navigating some challenging behaviour

25 replies

Navigatingstepparenting · 23/03/2026 09:34

I am really really struggling.
Been in my SD 15 and SD 12(Mini wife) for 7 years now. Also knew them before this as me and their dad knew each other. I have two children 8 and 11.
Over The 7 years their contact days have changed several times due to their mums preference at times and other times due to my partners work and hours. Up until end of last year it was all pretty good, had a couple issues with SD 15 who moved in with us for a few months but she has come out the other side and I get on really well with her, and she has moved back home with her mum.
Normally I take my children on holiday on my own, as I often take mine abroad (this was before we lived together) and my partner wouldn’t normally come as he doesn’t have passports for them or afford to. Or with UK holidays he couldn’t say he was coming as the kids were flaky with coming so it was too much money to risk as we never know until the night before if they are coming or not. He came on one holiday abroad with me and my kids as he just needed a breakaway, I paid for him as it was a last minute add on. We have now both agreed living together to put so much each week into a holiday fund and we can use this every couple of months to take them all away in the UK. SD15 is pretty consistent and will come if she says she will be. This weekend was our first weekend of doing this. (He also believes if we can do a weekend away with all the kids before we have a weekend away without any kids it softens the blow for his children as they have started staying Friday-Sundays. We had a lot booked this year as weren’t really having them for a full weekend/ they both didn’t come for extended periods of a few weeks and we have some concerts booked, couple weekends away we booked each other for birthdays etc.).
I picked up SD15 Friday as she’s not currently schooling, took her to an appointment; shopping for few bits and we were talking. She’s told me she is noticing SD12 sudden weird behave towards their dad and that she has told her she will start recording her. She’s tried to tell their mum but she shrugs it off as the eldest being jealous. I have noticed a change in SD12 behaviour and have been on some Facebook forums and things and this term Mininwife syndrome has appeared, tbh I hate the thought of labelling a kid but so much of it seems to be there. SD15 was saying that for example they went out for a Mother’s Day meal for their mum, SD12 insisted on going somewhere me and the dad take them and then asked the SD15 as she has the life360 app to track him as she saw a notification he was on the move and being like is he coming here, will we bumo into him here and I encouraged her to tell her dad whilst we were away this weekend and she did and he has considered deleting the app now or restricting his movements for SD15 so she isn’t put in this position again. She was also saying SD12 slags their dad of to their mum, often won’t go (mainly on weekends we have all the kids, or if she knows SD15 is going.) so I am not quite sure what is really going on. As when she is around she acts like his partner. She got in a grump and refused to speak the whole journey because my partner had to work 50 miles away on the day we went. If he went from his work to the camp site it would be 47 miles back up. As he could cut across a different way rather than doing 110 coming back to our home town and then driving up and driving for longer when he left at 5am that day to go to work. So I said I’ll get all the kids and meet you there: she was apparently whinging to her mum that she doesn’t think I would allow her to go back in his car either. Which I did allow her I wasn’t going to stop her. So she doesn’t speak on the way up apart from to say that the Dad had messaged and said he was there and the eldest turned around and said yes we know Dad has already rung us so that’s then put her in a bad mood too. Once we then checked in and in the caravan they both got changed and SD 12 or the shortest of shorts a top that tried to show off her bra straps and then we went down for dinner. She then proceeded to cry that she was cold. She got the mum involved texting the mum then saying she wanted to go home and the Mum was then messaging my partner demanding he drove to a shop an hour away to buy her a jumper when it was quite simple all they had to do is go back to the room and change their clothes however step daughter 12 had already annoyed the eldest stepdaughter because when we got to the rooms at the caravan he picked their rooms next to us and my children’s room was the one in front. The eldest wanted to sleep on the wall opposite the window which was basically the wall next to us because she doesn’t cope well with sleeping next to windows and light SD12 point blank fused because she was sleeping next to the wall because she wanted to sleep next to her dad because she asked what side of the bed does he sleep. Then when we went to sit down for dinner she wouldn’t just sit down and SD15 was like just sit down. She proceeded to moan continuously to SD15 when we all went to bed etc as she was telling me the next morning.
We had breakfast and SD12 apparently doesn’t even what everyone else is having so had to have peanut butter from the shop at £5 a jar whereas we all just had what we were given and white bread when everyone else wanted brown.Then we went swimming and she was climbing all over him and SD15 said to me she felt awkward and uneasy. I took myself of to the hot tub. He then came and joined me instead. Then we went to go for lunch and we suggested sharing pizzas. SD12 refused as apparently every option on the menu she doesn’t like. When we know she does it’s a form of control. She does it at home we only eat a few set meals but at her mums will eat so many more. So he allows her her own meal while we all shared 2 pizzas between the 5 of us left. Suddenly SD12 sprained her ankle, wanted carrying and overall his full attention but between all the kids she didn’t get that so got stroppy. She kicked off because my son went back on the car with her and her dad yesterday. SD15 came with me. Then she started telling SD15 to f* off on messages because she sat next to him and so did I. Then if I was walking next to him she would then try to intercept between. But so many other thins at home make sense. The way she is overly affectionate, constantly wants him all to herself, when she is over she will try to always get him on his own in her room, I would normally stand next to him washing dishes but now she will make a point of standing there overly close. He does not correct her on anything. He just says oh she just wants attention as she only sees me once a week. Well if that was the case she would come every weekend she can, she would come durn the week welhen invited but doesn’t, and wouldn’t slag him off for going away. She has also told him
He is to not go away with me for the weekends, she talks in this baby voice. I am telling him her behaviour is becoming a problem; his eldest daughter is telling him the same. She wants to start filming her sister. I am hoping this is a phase, but whereas before he wouldn’t argue back with me when I would say something a out his kids behaviour (like he does mine) he will now argue back constantly. Ultimately she ruined the weekend for the other 3 kids. We have a few more weekends away booked with her this year and my kids have said they don’t want her to come, her eldest sister has said the same. Which is sad because she is part of the family but she’s making everyone feel uneasy. How do I get him to perhaps see that he needs to establish some clearer boundaries, he needs to also explain if she refuses to eat when we no she eats something then she starves she doesn’t get special treatment.

OP posts:
EdieP · 23/03/2026 11:02

You can’t fix this, only your husband can. He needs to be setting boundaries at the same time as giving her additional attention. Maybe midweek meals out with just the two of them?

Navigatingstepparenting · 23/03/2026 11:26

@EdiePwould midweek meals out the two of them not enforce her behaviour though and it be a reward for her for this before. Date nights for them, I just worry it would make her worse

OP posts:
YepItsAnotherOne · 23/03/2026 11:40

Are you the same poster who enjoys ganging up on the 12 year old with her older sister? Making snide comments ‘under your breath’ that you know she will hear? Actively trying to physically separate her from her father and conspiring with her older sister to do so?

YepItsAnotherOne · 23/03/2026 11:45

Navigatingstepparenting · 23/03/2026 11:26

@EdiePwould midweek meals out the two of them not enforce her behaviour though and it be a reward for her for this before. Date nights for them, I just worry it would make her worse

Ya, just read your response here and you’re definitely the same poster.

How many times do you need to be told that your behaviour is appalling and you’re ruining this girl’s teenage years and relationship with her father?

Navigatingstepparenting · 23/03/2026 13:11

@YepItsAnotherOneno I am not. I’m not sure who you are on about tbh. We all had a great relationship, me and the older SD have a fab relationship. The youngest has spent alot of time with her mum not visiting and is now visiting more again but her whole attitude has changed slightly. Maybe a meal on their own maybe good, but I also don’t know if it would make her worse. I’m just looking for opinions. I want to sit down and speak fully to my partner about it this weekend whilst we are away celebrating our anniversary, as the eldest has asked me to speak to him about it to which I am happy to do and feel pleased she can speak with me. I don’t want to physically seperate her, I would like to just have clear boundaries, clear routines and make the time shared fair between everyone. To also have my eldest SD not want to come away again with us all because of how the youngest is is a shame and I really enjoyed her company this time. What is said and done between them as sisters I cannot control and of course expect a little rivalry between them for their dads attention.

OP posts:
Outnumbered1983 · 23/03/2026 20:41

Do your SD’s spend time with their father just the 3 of them?

EdieP · 24/03/2026 07:06

Navigatingstepparenting · 23/03/2026 11:26

@EdiePwould midweek meals out the two of them not enforce her behaviour though and it be a reward for her for this before. Date nights for them, I just worry it would make her worse

He needs to carve out individual time with all of them. Or at least both SDs.

If he routinely gives her time, and is firm with the other boundaries, it’ll iron out. In all honestly she’ll probably be focused on boyfriends or friends in a year or two anyway.

teletubbyy · 24/03/2026 07:20

Sounds hard work and I’m so glad my sd is no longer that age! I think it comes from a place of insecurity though and trying to find her place in the family, you’re a threat to her relationship with her dad, which we know is silly but she is a child and can’t rationalise her thoughts.

Navigatingstepparenting · 24/03/2026 07:42

@EdiePat the moment he doesn’t. I can suggest this to him. When we weren’t living together he would say they are welcome durn the week and often would say to go out and get coffee and cake as she would call it by durn the week she ignores his messages or won’t go.

We had a long conversation last night and I tried to explain all the eldest daughter was saying, how uneasy it’s all making her feel, and how for example their mother wouldn’t allow SD15 to wear her bikini swimming this weekend as apparently it made her look like a prostitute and was inappropriate to wear around her dad but to give it to SD12 to wear instead as she wants a bikini. He even admitted that he thought that was weird, I explained how SD12 choose to wear shorts not covering her ass, with a t shirt that was showing her bra straps as was shoulder less etc Friday and not take a jumper and that and cry she was cold and wanted his undying attention because she wasn’t sat opposite or next to him and she was lapping up his jumper to wear etc. and he did actually listen. The food thing is control, she refuses to eat she knows he will worry And over compensate and let her have her own meal or whatever she wants regardless of the limitations given to the other kids. He didn’t argue back and be defensive like normal so think maybe he’s listening.
i am taking SD15 out today for some homeschooling bits so will see what she has to say and what was said to their mum by the youngest.

OP posts:
the7Vabo · 24/03/2026 08:08

You lost me when you started referring to a 12 year old as a “mini wife”, and going into long descriptions about what she’s wearing. Are you implying she is trying to seduce her own father?

Ive never heard of “mini wife”, is gross, offensive & seems inappropriate when you are talking about a 12 year old child.

Why if she wanted some time could she not get it, because he was minding the other kids two of whom are yours?

Blueuggboots · 24/03/2026 08:12

You lost me at miniwife.

the7Vabo · 24/03/2026 08:16

And the 15 year old is a teenager who is having ups & downs with her 12 year old sister. Standard. No need for you as an adult to step in & stir the pot by bitching with her about her sister.
Thats not adult behaviour. And you can’t talk about boundaries on the one hand while doing this.

WelshRabBite · 24/03/2026 08:19

There’s been a lot of change and upheaval in your SDs lives.

Their Dad no longer lives with them, but he does live with your DC.

Their dad only spends time with them when you and your DC are around, they don’t currently get any one-on-one time with him.

SD15 lived with her dad for a while, SD12 has never had that experience.

All of SD12s actions are crying out for her dad to notice her, show her some love, boundaries, care and he isn’t doing that.

Seeing your own DC once a week, in a group with other people isn’t parenting, it’s attending a group activity with your DC in the same room.

Your DP really needs to spend some time alone with his own kids, building a healthy relationship with them, because currently he doesn’t have one and it takes time and energy to build, but he’s not putting that time and energy in.

Do you think your relationship with your DP would have flourished if you NEVER saw him on his own? If you were never alone with him? If he was able to carve out time in his life to build a relationship with you, he should also be prioritising time with his kids. He was prepared to do that to build a relationship with a sexual partner and your SDs have witnessed this, maybe your SD12 now believes that the only way to get daddy’s attention is to sexualise herself?

The poor girl needs some love and reassurance and time with her dad, and possibly counselling for the food issues. Support her and love her, don’t push her away.

the7Vabo · 24/03/2026 08:43

WelshRabBite · 24/03/2026 08:19

There’s been a lot of change and upheaval in your SDs lives.

Their Dad no longer lives with them, but he does live with your DC.

Their dad only spends time with them when you and your DC are around, they don’t currently get any one-on-one time with him.

SD15 lived with her dad for a while, SD12 has never had that experience.

All of SD12s actions are crying out for her dad to notice her, show her some love, boundaries, care and he isn’t doing that.

Seeing your own DC once a week, in a group with other people isn’t parenting, it’s attending a group activity with your DC in the same room.

Your DP really needs to spend some time alone with his own kids, building a healthy relationship with them, because currently he doesn’t have one and it takes time and energy to build, but he’s not putting that time and energy in.

Do you think your relationship with your DP would have flourished if you NEVER saw him on his own? If you were never alone with him? If he was able to carve out time in his life to build a relationship with you, he should also be prioritising time with his kids. He was prepared to do that to build a relationship with a sexual partner and your SDs have witnessed this, maybe your SD12 now believes that the only way to get daddy’s attention is to sexualise herself?

The poor girl needs some love and reassurance and time with her dad, and possibly counselling for the food issues. Support her and love her, don’t push her away.

100%

And she needs adults who put the needs of their kids first. Both girls need quality time with dad without his new partner & two kids.

She needs to feel secure. Instead of judging her behaviour look at the reasons for it.

And stop thinking & talking about her in a sexualised way. She’s a 12 year old child, calling her a “mini wife” implies she’s the competition.

And nobody should be filming her.

WheretheFishesareFrightening · 24/03/2026 08:53

Navigatingstepparenting · 23/03/2026 11:26

@EdiePwould midweek meals out the two of them not enforce her behaviour though and it be a reward for her for this before. Date nights for them, I just worry it would make her worse

She sounds like a child who feels replaced. Her Dad has a new family now who he spends more time with than her, and her one ally on that could have understood (her sister) is now integrated into the new family and she still isn’t. If she behaves well she probably feels like a wallflower and doesn’t get seen at all. So acting out gets her the attention she needs (and it is needs, she’s a child).

When does her dad make her feel special and like the most important thing in his world? At the moment, it sounds like she is only centred like that when she misbehaves. You can’t punish her for having unmet needs, you need to meet the needs first and then put in boundaries when you’re all together.

Poor kid.

EdieP · 24/03/2026 09:20

If I’m right, you don’t share children? He needs to say to each of the SDs that one evening a week and one weekend morning is theirs, with just him, to do whatever they want. If they don’t want it, that’s fine. But make it ironclad and keep the boundaries the rest of the time.

I’d be concerned you’ve got a preteen who sees sexuality as the only way to get attention, and you’ll end up with her pregnant to the first wrong’un who gives her attention.

YepItsAnotherOne · 24/03/2026 10:38

I would bet my house that you are the exact same poster that has posted numerous threads about this poor girl, putting her down, insulting her, making snide comments within her earshot, ganging up on her with her sister, talking shit about her to her father and sexualising her actions and what she’s wearing.

And you have been told numerous times that your actions are despicable.

the7Vabo · 24/03/2026 11:28

YepItsAnotherOne · 24/03/2026 10:38

I would bet my house that you are the exact same poster that has posted numerous threads about this poor girl, putting her down, insulting her, making snide comments within her earshot, ganging up on her with her sister, talking shit about her to her father and sexualising her actions and what she’s wearing.

And you have been told numerous times that your actions are despicable.

Sexualising a 12 year old child is v concerning.

Outnumbered1983 · 24/03/2026 13:19

I agree with everything previous posters have said. She’s 12 years old, she’s got a mix of hormones and emotions at that age and she isn’t getting 1:1 time with her dad or even 2:1 so the dad and sister. Their dad should be parenting them and spending time away from your family with his own children.

you don’t need to dig with the 15yr old to find out what was said to mum - that’s absolutely non of your business and you are actively playing into how torn the 15 year old feels. Back off and stop stirring the pot and encourage their dad to actually be a present father with them. OP your tone screams of a jealous step parent.

the7Vabo · 24/03/2026 13:27

Outnumbered1983 · 24/03/2026 13:19

I agree with everything previous posters have said. She’s 12 years old, she’s got a mix of hormones and emotions at that age and she isn’t getting 1:1 time with her dad or even 2:1 so the dad and sister. Their dad should be parenting them and spending time away from your family with his own children.

you don’t need to dig with the 15yr old to find out what was said to mum - that’s absolutely non of your business and you are actively playing into how torn the 15 year old feels. Back off and stop stirring the pot and encourage their dad to actually be a present father with them. OP your tone screams of a jealous step parent.

Edited

I think the issue is less with the 12 year old & more with you OP.

Think about the level of detail you have dissected this child’s clothes, that you have sexualised a child’s relationship with her father, that you are playing bitchy High Schools girls with her sister.

You’re sexualising a 12 year old child and making her sound like the other woman. And you’re grooming a 15 year old to join in while you buy her treats.

What does the 12 year old represent to you? Her mother? Youth & beauty?

NerdAlertt · 24/03/2026 13:50

YepItsAnotherOne · 24/03/2026 10:38

I would bet my house that you are the exact same poster that has posted numerous threads about this poor girl, putting her down, insulting her, making snide comments within her earshot, ganging up on her with her sister, talking shit about her to her father and sexualising her actions and what she’s wearing.

And you have been told numerous times that your actions are despicable.

Agree that this is definitely the same poster. The 'durn' for during gives it away. Not a common misspelling.

MeridianB · 24/03/2026 15:30

Much more worrying to think of the amount of time and headspace you’re giving to DP and his DDs which could be benefiting your own children.

Why expose them to all this constant, negative drama? Just move out and go back to dating until all the children are much older.

Easterbunnyishotandcross · 24/03/2026 15:38

I would be spending my time with the older one.. Leave Miss Moody to her df....
Stop being so invested.. Leave him to it.
If she sulks when you go away then df can stay behind with her while you and the other dc go have fun. Basically stop allowing her to dictate YOUR life. If her df is happy with her the way she is then learn to ignore or.

YepItsAnotherOne · 24/03/2026 15:52

NerdAlertt · 24/03/2026 13:50

Agree that this is definitely the same poster. The 'durn' for during gives it away. Not a common misspelling.

Yep, I knew beforehand anyway, but the durn did it for me too.

the7Vabo · 24/03/2026 16:27

Easterbunnyishotandcross · 24/03/2026 15:38

I would be spending my time with the older one.. Leave Miss Moody to her df....
Stop being so invested.. Leave him to it.
If she sulks when you go away then df can stay behind with her while you and the other dc go have fun. Basically stop allowing her to dictate YOUR life. If her df is happy with her the way she is then learn to ignore or.

I’m baffled that’s what you’ve taken from this thread.

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