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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

To ask for positive stories of mixed sex siblings

107 replies

Mushroo · 31/08/2025 07:33

Firstly, I know I’m being massively unreasonable.

When I had my first LO, I actually had a slight preference for the other sex, but once they arrived they are everything I wanted and more. They are just my world and everything people say about the positives for the other sex, they have! They are just the best.

Im pregnant with number 2 and really really wanted two the same, because I know so many brother / sister sets who are so close and it’s lovely.

We just found out we’ll be having one of each and I’m really upset.

Im surprised by my reaction and I know I’m being massively unreasonable, but whilst I get my head around it and adjust, please can you regale me with why one of each is amazing?

OP posts:
nam3c4ang3 · 31/08/2025 08:19

I have one of each - 2 years apart - they hate each other now but hoping it’ll change soon 😂 - I wanted of each tho.

Abthdust · 31/08/2025 08:19

This is a weird take. I have a DS and two DDs. My DDs get along beautifully; one of my DDs gets on really well with DS, and the other does not. It has fuck all to do with their sex, and everything to do with their personalities.

towhoknowswhere · 31/08/2025 08:17

In the nicest way possible I think you need some support with how you’re feeling op. It’s not right!

I’m 7 years older than my db and we are the best of friends. My dh has a brother less than 2 years younger and they barely speak!
There’s a lot of nonsense out there about age gaps, same sex siblings etc but it fundamentally boils down to a mixture of upbringing & luck if you get on with your sibling!

FiveBarGate · 31/08/2025 08:16

Boy and girl here. Four year age gap.

They get on brilliantly. It may not last forever but at 12 and 8 it's still good.

The downside is they gang up on me. If I tell off either one for something they've done to the other then they'll go and hug each other and I'm the bad guy!

There's no telling and no guarantees whatever you have and whatever the age gap. I've known boys close in ages fight continuously and others be best pals. Or the same combination of kids switch between the two depending on their ages.

gannett · 31/08/2025 08:14

It's really strange (and a little basic) to think that your child's sex will be the most interesting, important and defining aspect of who they are.

Their personalities and interests are far more likely to determine how close they are.

MidnightPatrol · 31/08/2025 08:13

Allswellthatendswelll · 31/08/2025 08:07

Is it a boy you are expecting? I find it bizarre there is now a real prejudice against boys!

Most of my friends with sisters have much more tension with their sisters than brothers. Opposite sex is often an easier relationship.

I have one of each and part of me is sad they won't get a same gender sibling but that is life. There are pros and cons to all combinations.

I agree to be curious about the reversal of desire of boys and girls…!

I am interested in the reasoning!

ResusciAnnie · 31/08/2025 08:10

It’s the first time the kids have ever been alive or had siblings so it’s totally fresh and anyone else’s experience will have no bearing on how their relationship goes. Unless you influence it like that. Other people’s experiences are a red herring/irrelevant, if you will. Theyre a brand new sibling set and have the potential to go down any route.

I’m not close to my sister at all. But I have 2 boys and a girl who all get on swimmingly.

iirbRosb · 31/08/2025 08:10

I get you OP, I have a sister and I had a moment of being sad my DC won’t have that sister relationship but talking to people the closeness of siblings has nothing to do with being same sex.

dairydebris · 31/08/2025 08:09

I think its all down to personality.

However I will say I think having both sexes is beneficial for learning how to treat boys / girls respectfully. We can have lots of casual, natural convos about consent, sex, differences etc. My boy understands girls and respects them and vv.

I know all combos are great but I feel very lucky to have both in my family.

cramptramp · 31/08/2025 08:09

Really upset? Wow. I have one of each and they have always got on very well and are still close in adulthood.

RubySquid · 31/08/2025 08:08

Allswellthatendswelll · 31/08/2025 08:07

Is it a boy you are expecting? I find it bizarre there is now a real prejudice against boys!

Most of my friends with sisters have much more tension with their sisters than brothers. Opposite sex is often an easier relationship.

I have one of each and part of me is sad they won't get a same gender sibling but that is life. There are pros and cons to all combinations.

I have brothers. As a child always wanted a sister. Then had 2 daughters and 20 years of war in house. Glad I never had the sister then

Goodideaornot · 31/08/2025 08:08

My cousins, a boy and a girl, got on well enough growing up, but also quite different so maybe not super close. Now they’re adults (in their 20s) they adore each other and call/text every day. They area massive support to each other. So even if yours aren’t super close growing up they could still be close as adults. Just don’t worry too much about this. Don’t try to force a particular relationship .

Octonopes · 31/08/2025 08:07

I have one brother, close in age

He's just the best person and we're close as adults, we've chosen to live near each other and we go on holiday together. He's a wonderful uncle to my kids and my sister in law is awesome too. I could talk to him for hours and hours. As kids we got on really well and played together loads

I think it was very helpful to me as I've gone on to work in a very male dominated environment but having grown up with my brother and lots of his mates it feels very normal to me. My brother has a number of platonic female friends

I would also say in same sibling sets, some people were quick to label them as "the pretty one" "the clever one" "the quiet one" "the sporty one" which became a bit of a burden to live up to. We had more freedom labelled as just "the boy" and "the girl". I've explained that very badly, and it won't be everyone's experience, but it was something I felt conscious of even as a child.

Catcatcat111 · 31/08/2025 08:07

My two are two years apart and get on really well. Family holidays and always good fun.

Allswellthatendswelll · 31/08/2025 08:07

Is it a boy you are expecting? I find it bizarre there is now a real prejudice against boys!

Most of my friends with sisters have much more tension with their sisters than brothers. Opposite sex is often an easier relationship.

I have one of each and part of me is sad they won't get a same gender sibling but that is life. There are pros and cons to all combinations.

RubySquid · 31/08/2025 08:05

LittleCarrot12 · 31/08/2025 07:39

With my second I thought a girl would be nice but wanted a brother for my son more. I also wanted a small age gap as thought they’d be closer. I’ve since realised it’s how siblings are raised that makes them close, not sex or age gaps.

I don't even think that how they are raised makes them close or not. I think it's merely personality.

Imagine you meet a person you wouldn't spend much time with ( just because they are not your type of person) If they happened to be a siblings then you aren't going to be close no matter how you are brought up

My DDs spent the first 20 years of their lives arguing then learned to just ignore each other and be polite on family occasions

Tipeetommeey · 31/08/2025 08:01

My boy and girl are currently travelling in Australia together

BriceNobeslovesMurielHeslop · 31/08/2025 08:01

I only have a brother, we are both in our early 40s and very close- we’re going on holiday together next month!
My parents are both from sets of the same, and neither of them have great relationships with their siblings.

Mushroo · 31/08/2025 07:59

@MidnightPatrol @icallshade i don’t actually have a sibling so this is all based on general observations. I know loads of same sex pairs that are really close, but I don’t see it so much with mixed sex. Eg DH is literally best friends with his brother.

Of course, some same sex hate each other, but generally they do seem to be closer.

@ObsidianTree thats lovely, and exactly the kind of thing I wanted to hear!

like I say, I know AiBU. It’s not that I’m sad to have two different, more that I’m sad for my LO if that makes sense. I’m honestly really shocked how strongly I feel about it, I think pregnancy hormones aren’t helping

OP posts:
SquishedMallow · 31/08/2025 07:59

MidnightPatrol · 31/08/2025 07:36

I think this line of thinking is so bizarre. I assume it stems from wanting to replicate a specific relationship you have with a sibling?

The child won’t know any different to what they grow up with. Brothers and sisters can have perfectly lovely friendships.

I’d argue a positive is they’re less likely to be directly competitive in the way single sex siblings can be, it gives the other a better insight into the opposite sex etc.!

I too find it utterly bizarre.

I have one of each (always secretly thought that was the ideal ) close as close can be. I had a really small gap (purposefully) they barely ever disagree and there's no competition between them. Best of friends !

Rocknrollstar · 31/08/2025 07:58

I had one of each sex and they are closer than i ever was to either of my sisters. They shared everything as children, kept a strong relationship going when they went away to uni. DS is married with children but he still talks to his sister most days. They have never fallen out. There is never any guarantee that two of the same will get on.

Icepop79 · 31/08/2025 07:56

My 2 are girl/boy and almost 6 years apart. They are adorable together. They have a pride for each other’s achievements because they’re into such totally different things that they see no threat to themselves in the other one doing well.

Fizbosshoes · 31/08/2025 07:54

I have one of each, they loved each other til the youngest was about 7 ish, then he became an annoyance to DD, and they had not much in common. They bickered a lot or ignored each other...although we're pretty good together on holiday! However now late teens they get on really well again. But that easily could happen with same sex siblings

CloseThatDoor · 31/08/2025 07:50

It really is down to personalities.

Whether siblings get on is somewhat uncontrollable.

I have an older brother, we don't get on because he's a prick. If he was female, with the same personality, he'd still be a prick.

My DM is one of 4 girls. All very strong personalities; none of them speak to each other.

ladyamy · 31/08/2025 07:50

I have a twin brother as my only sibling, I never imagined what it would be like to have anything else.