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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

I find SD12 increasingly unpleasant

168 replies

ClaytonC · 19/02/2026 21:06

… And I don’t know what I can do about it.

I’ve known these kids for eight years. I’ve always gelled with SD13 (sweet, creative, slightly awkward) and SS9 (funny, sporty, loving). SD12 has always been the one I’ve had the least in common with. She’s extroverted, dominant and wants to have her own way.

AIBU: I should make more of an effort to bond with her
AINBU: it’s okay not to like everyone, just remain polite and keep distance when possible

OP posts:
Sartre · 20/02/2026 14:30

If you’ve been together since she was four and you got together a year after her parents split, how long had you been together when you first met her? Was it pretty much immediately? To me it sounds like you perhaps rushed things back then and that she’s always felt she had to share her father with you.

Her mother’s negativity towards you is neither here nor there, we only have your side of things so don’t know how unjust that actually may be. The fact is, when you met him he literally had a baby… Did something inside you not think that situation was a little odd and that down the line, things may get complicated?

XiCi · 20/02/2026 14:28

ClaytonC · 20/02/2026 14:10

Thanks to the posters who’ve posted their insight. I’m not going to throw money at her to try to make her like or respect me more. I’m also not going to insist she undergoes neurodiversity testing when she, her school and her parents don’t believe she has it!

I’ll carry on doing what I’m doing which is treating her the same as her siblings, being polite and consistent, and hope she grows up nicer!

Oh come on. Youre actually saying that you've now discussed this with your stepdaughter, her parents and the school? when on a post a few minutes ago you had a complete lack of understanding as to what adhd was. Yes OK 🤣. You just carry on doing what you're doing. Seems like thats working really well for everyone involved. Poor kid

NewZebra · 20/02/2026 14:14

havingoneofthosedays · 19/02/2026 22:30

Nothing more creepier than a woman in competition with her SD 🤢

Or a daughter in competition with her step mum I think you’ll find 🙄

nomas · 20/02/2026 14:14

OnlyMabelInTheBuilding · 20/02/2026 13:25

Just a dig at stepmums

Agreed

nomas · 20/02/2026 14:11

Discoated · 20/02/2026 13:59

I don’t have any personal stake in this situation at all, so neither care no not care about OP or her blended family members so it's a little unusual to accuse me of not caring.

OP is somewhat reductive in how she describes her 3 step daughters making strong judgements about the children in her care. Calling a 12-year-old dominant comes across like step mother sees this young child as competing for control in the family hierarchy, which is a really strange angle.

'She’s extroverted, dominant and wants to have her own way' sounds very much like a normal confident 12 year old. Surely better for the girl than being withdrawn and submissive. At 12, children are still learning social skills, self-control and how to express themselves.

Dominant is a perfectly valid personality adjective.

My sister was dominant over me throughout our childhoods and my parents didn't correct her behaviour, which means that that me and my sister have a strained relationship even now, mostly because she still thinks she should be able to be dominant and get her own way even now.

You are talking about something you seem to have very little insight into.

ClaytonC · 20/02/2026 14:10

Thanks to the posters who’ve posted their insight. I’m not going to throw money at her to try to make her like or respect me more. I’m also not going to insist she undergoes neurodiversity testing when she, her school and her parents don’t believe she has it!

I’ll carry on doing what I’m doing which is treating her the same as her siblings, being polite and consistent, and hope she grows up nicer!

OP posts:
nomas · 20/02/2026 14:09

Discoated · 20/02/2026 14:06

Praising a kid’s normal behaviour ('good girl') is now a dig at step mums (plural)? That’s a new one.

Praising a girl as a good girl for dominating her sisters and getting her own way over them is bizarre, to say the least.

Discoated · 20/02/2026 14:06

OnlyMabelInTheBuilding · 20/02/2026 13:25

Just a dig at stepmums

Praising a kid’s normal behaviour ('good girl') is now a dig at step mums (plural)? That’s a new one.

Discoated · 20/02/2026 13:59

nomas · 20/02/2026 13:23

You actually don’t care about this girl, she’s just a means to beat up the OP.

I don’t have any personal stake in this situation at all, so neither care no not care about OP or her blended family members so it's a little unusual to accuse me of not caring.

OP is somewhat reductive in how she describes her 3 step daughters making strong judgements about the children in her care. Calling a 12-year-old dominant comes across like step mother sees this young child as competing for control in the family hierarchy, which is a really strange angle.

'She’s extroverted, dominant and wants to have her own way' sounds very much like a normal confident 12 year old. Surely better for the girl than being withdrawn and submissive. At 12, children are still learning social skills, self-control and how to express themselves.

Starlight1979 · 20/02/2026 13:56

ClaytonC · 20/02/2026 10:49

Her dad didn’t leave her mum. Her mum left DH when she was pregnant to be with someone else. I knew DH through work and we started dating about a year later.

DH’s responses aren’t great but he tries. Often we found that if he corrects her behaviour in public or in front of me and other SC, she’ll cause a scene and other SC will acquiesce. I get the impression she rules the roost at her mum’s house. For example, if we’re out and we all fancy a pizzeria but she wants Thai, she’ll cry and other SC will say they want Thai too. If we insist on the pizzeria, she’ll be in silent tears the whole time. If DH takes her home, she’s instantly happy because she gets to be alone with him. If we all go home, SC are being indirectly punished.

We thought him correcting her behaviour in private might be better but to be honest I don’t think it’s making much difference. Apparently she is receptive and apologetic but I can’t see any shift in behaviour.

Her dad didn’t leave her mum. Her mum left DH when she was pregnant to be with someone else. I knew DH through work and we started dating about a year later.

Uh huh. There seems to be a recurring theme on MN where a step-parent posts about a difficult child, it ends up coming out (usually by basic maths) that they actually got with their partner when the children were babies / toddlers, but then as soon as it's questioned, the response is that the ex left the bloke for someone else and they definitely weren't the OW.

I mean, I'm not doubting it ever happens but the chances of a woman randomly leaving their husbands / partners when they're pregnant / have just had a baby are pretty fucking slim! Yet on MN it seems to happen regularly!

JudgeJ · 20/02/2026 13:28

WishingIwasyoungerandslimmer · 19/02/2026 21:29

If you are not as keen on DD12 as the others, she will be picking up on it and the situation will just become more entrenched.

So, I agree with @sprigatito, that difficult as it may be for you, just try to engage with her more.

Edited

This is MN, it will always be the step-mother's fault! The three children may have different personalities, the 12 year old not being as likeable. One assumes that the OP has treated all three the same over the years, it's not always the step-mother's fault, some step children as they get older can become knowingly very manipulative.

OnlyMabelInTheBuilding · 20/02/2026 13:25

nomas · 20/02/2026 13:23

You actually don’t care about this girl, she’s just a means to beat up the OP.

Just a dig at stepmums

nomas · 20/02/2026 13:23

Discoated · 20/02/2026 09:33

She’s extroverted, dominant and wants to have her own way.
Good girl

YABU

You actually don’t care about this girl, she’s just a means to beat up the OP.

XiCi · 20/02/2026 12:55

ClaytonC · 20/02/2026 10:52

She’s fully capable of sitting through a film she chose. I used to take her when I went to town or to the shop, but each trip was costing me £50-100 extra because she needed something. So I started saying no, and now she chooses not to come with me. I don’t mind picking up the occasional treat or item, but I don’t want to be being fleeced every time I go to Tesco for a pint of milk.

ADHD is not a total lack of attention, but a deficiency in regulating it, which is why she can focus on a film she chose that she finds interesting. Im not saying she 100% has it, just that as someone with ADHD and an ADHD child a lot of what you are describing jumps out. I think you should look into it but you seem determined to just want confirmation that she is annoying little madam. The more you write the more I sympathise with her and let's not pretend that she doesnt know you dislike her because she definitely will.

Emonade · 20/02/2026 12:48

Sartre · 20/02/2026 08:31

Does she ever spend time with her dad alone? I’m just thinking back to my childhood, my parents split when I was a baby and my dad intentionally never introduced me to anyone he was dating. Weekends were our time, I didn’t have to ‘share’ him.

I think if you’re always around, that should change and she should be allowed to have some time just with her father. You’ve been a fixture since she was very young and I think she feels insecure and like you’ve ‘stolen’ her dad. She’s only a child, don’t expect her to understand the world from a mature adult perspective.

Absolutely

FunMustard · 20/02/2026 12:24

I will also say that at 12, I was an absolute horror. Not in the same way, but I was vile. Absolutely vile.

My children are now 14 and 17 and have been absolute delights compared to me. I also have a step son who was a delight at 12 - however, mine are all boys and clearly are quite different in terms of personality. Very biddable and easy going. I was not lol!

FunMustard · 20/02/2026 12:20

I agree with pp, the issue is not you and your responses, it's the responses from your husband. Not just in the moment, but afterwards. He needs to be having conversations that reiterate that she can't just manipulate the situation all the time to get her own way, that she's part of a family, not the only princess in the castle.

She's 12, this is behaviour that can be corrected, but not by just ignoring it and letting her get her own way all the time because it's easier. The other children, and you, miss out because of it.

This is something that might not be easy. But I'm sure she'd rather learn now, than to have the love of her life leave her when she's an adult, breaking her heart, because she's never learned that constantly being manipulated so one person gets her own way isn't the way anyone else likes to live.

mindutopia · 20/02/2026 12:15

I mean, I think most parents find young teens increasingly unpleasant. 😬

Harrietsaunt · 20/02/2026 12:12

You have a DH problem. He is tiptoeing around his most dominant child to the detriment of the others.

If he refuses to tackle it, I don’t think there’s anything you can do, other than put up with her behaviour or leave.

I would probably leave as I would have lost respect for him.

Barnbrack · 20/02/2026 11:44

ClaytonC · 20/02/2026 10:49

Her dad didn’t leave her mum. Her mum left DH when she was pregnant to be with someone else. I knew DH through work and we started dating about a year later.

DH’s responses aren’t great but he tries. Often we found that if he corrects her behaviour in public or in front of me and other SC, she’ll cause a scene and other SC will acquiesce. I get the impression she rules the roost at her mum’s house. For example, if we’re out and we all fancy a pizzeria but she wants Thai, she’ll cry and other SC will say they want Thai too. If we insist on the pizzeria, she’ll be in silent tears the whole time. If DH takes her home, she’s instantly happy because she gets to be alone with him. If we all go home, SC are being indirectly punished.

We thought him correcting her behaviour in private might be better but to be honest I don’t think it’s making much difference. Apparently she is receptive and apologetic but I can’t see any shift in behaviour.

How often do you have her

ChavsAreReal · 20/02/2026 11:12

Smeuse · 20/02/2026 10:53

DH’s responses aren’t great but he tries

He is her parent, he should do a lot more than try.

This.

She's an attention seeking teen, currently testing the waters to see what she can get away with.

He is your problem.

Calliopespa · 20/02/2026 11:00

ClaytonC · 20/02/2026 10:52

She’s fully capable of sitting through a film she chose. I used to take her when I went to town or to the shop, but each trip was costing me £50-100 extra because she needed something. So I started saying no, and now she chooses not to come with me. I don’t mind picking up the occasional treat or item, but I don’t want to be being fleeced every time I go to Tesco for a pint of milk.

Yeah she's a pain op. But what do you want us to say? Kids often are - especially at that age.

It's a bit like acquiring a dog and complaining that it poos.

Smeuse · 20/02/2026 10:53

DH’s responses aren’t great but he tries

He is her parent, he should do a lot more than try.

ClaytonC · 20/02/2026 10:52

XiCi · 20/02/2026 10:11

The child is 12 and you speak about her as if she is an adult woman competing for the attention of your DH. She is clearly struggling here and needs some help. What is the problem really of doing something with her she enjoyed that cost a bit of money instead of a free dog walk? It was clearly something she enjoyed doing with you. I take it it was something like go shopping, get afternoon tea, get nails done rather than demanding a weekend on a yacht in Antibes. You've stopped doing these activities with her yet carried on the activities the other 2 kids enjoy which must be hurtful. Shes 12, not some money grabbing adult.

BTW most of the behaviour you describe such as inability to focus through a movie, heightened emotional responses and rejection dysphoria are classic ADHD symptoms. 12 is the age that the symptoms become more noticeable and they start to need more help. Masking can be exhausting. You might want to read up about it and start the ball rolling for diagnosis if you think the symptoms fit as its not going to resolve by itself!

She’s fully capable of sitting through a film she chose. I used to take her when I went to town or to the shop, but each trip was costing me £50-100 extra because she needed something. So I started saying no, and now she chooses not to come with me. I don’t mind picking up the occasional treat or item, but I don’t want to be being fleeced every time I go to Tesco for a pint of milk.

OP posts:
ClaytonC · 20/02/2026 10:49

Woodfiresareamazing · 20/02/2026 09:50

I have RTFT and what's missing is DH's response to DSD12 when she disrupts movies, asks OP and her family for money, tries to monopolise his attention by climbing on his lap etc

It's his response that is key. If she suffers no consequences, but gets her own way and the majority of whatever time he can give individually to his children , then of course she will continue to do what she's doing. Because it works, it gets her what she wants.

As for her not replying to her dad's messages when she's at her mum's - I think that's her trying to establish control over their relationship when in reality she has very little.

I think it does all come down to attachment issues.
In her eyes, her dad left her when she was 4. He chose you instead of staying with her. She simultaneously wants to punish him for that, and have him to herself as much as she can.

I'd also be interested in her relationship with her siblings. How do they react when she talks through a movie they chose? When she pushes them aside to sit on his lap? When she chooses the outing, again... And how does DF handle that?

Edited

Her dad didn’t leave her mum. Her mum left DH when she was pregnant to be with someone else. I knew DH through work and we started dating about a year later.

DH’s responses aren’t great but he tries. Often we found that if he corrects her behaviour in public or in front of me and other SC, she’ll cause a scene and other SC will acquiesce. I get the impression she rules the roost at her mum’s house. For example, if we’re out and we all fancy a pizzeria but she wants Thai, she’ll cry and other SC will say they want Thai too. If we insist on the pizzeria, she’ll be in silent tears the whole time. If DH takes her home, she’s instantly happy because she gets to be alone with him. If we all go home, SC are being indirectly punished.

We thought him correcting her behaviour in private might be better but to be honest I don’t think it’s making much difference. Apparently she is receptive and apologetic but I can’t see any shift in behaviour.

OP posts:
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