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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

To ask if you have half siblings

85 replies

Vibted7777 · 17/01/2026 15:42

And do you have a relationship with them

OP posts:
Nevermind17 · 17/01/2026 17:51

I was discussing this with my DS recently. He said that he’s noticed amongst his friends with half siblings that where the mother is the common parent, they’re as close as full siblings; but where the father is the common parent they’re not close.

NewYearNewJob2024 · 17/01/2026 17:53

Yes, but have never called her my 'half' sister...she's my sister and we're very close.

WhiteRose222 · 17/01/2026 17:56

I have three. Get on well with two of them. Never shared a home with them due to gap between us and I think that has impacted the relationships (positive and negative).

Two treat my like full siblings. One doesn’t and hasn’t really ever shown interest.

Coffeeishot · 17/01/2026 18:01

I do yes, a half sister who is a bit younger, we get on fine no issues apart from age gap we don't have much in commpn and a half brother who i was told about but have never met.

RitaIncognita · 17/01/2026 18:05

badboss2020 · 17/01/2026 17:17

Does it make a difference if it’s the mum that’s shared rather than the dad?

kids tend to live with their mums so I see a lot of half siblings with the same mum who are very close but who aren’t close to the dads other children.

Possibly, but my two half-siblings are from my dad, and we are close. I did spend quite a bit of time with my dad (and them) growing up, though.

Mrsm010918 · 17/01/2026 18:14

I've got 3 but they're all 11+ years older than me so we didn't really grow up together. I'd say I get on well with one when we're together but not what I consider close. one I don't speak to at all, no falling puts just not my kind of person. And the last I do check in with weekly primarily because they have SEN but again not what I consider close.
I am close with my younger brother, there's 3 years difference between us

Fidgety31 · 17/01/2026 18:17

No never met them. I think there’s 3 or 4 of them maybe. Don even know their names

OurChristmasMiracle · 17/01/2026 18:19

One half brother I’ve never met and didn’t know about until after both parents died and one full sister who I’ve been no contact with since my mums death over 12 years ago

Vibted7777 · 17/01/2026 22:55

Perplexin · 17/01/2026 17:20

1 Older half brother - we have a relationship.

1 younger half sister - no relationship at all. I've never met her. Shes reached out but I dont have any interest in meeting or talking to her.

What made you not want to talk to her

OP posts:
Stardust286 · 17/01/2026 22:58

Yes one on my dad's side but our dad rarely had us both on the same day so didn't have a close relationship. Have spoken on social media but that's as far as it's gone

Itsallinyourhead2022 · 17/01/2026 23:07

Two half brothers and two half sister and one full sister. My dad was our common parent and we are all extremely close. My dad died just over four years ago and we’ve all just carried on as normal. Always referred each other as brothers and sisters.

Runningoutofpatiencefucksandmoney · 17/01/2026 23:22

Yes 4. And none of us get on.

My DD is one of 7 half sibs and gets on with all of them

OnlyFrench · 17/01/2026 23:24

Yes, big age gaps but grew up together. I adore them. Full sibling, not so much!

Oricolt · 17/01/2026 23:26

I have a strong relationship with the half siblings who I shared a home with growing up. They're just my siblings - no difference whatsoever between halfs and fulls.

I have no relationship at all with the half siblings I didn't share a home with.

Sarkykitty · 17/01/2026 23:33

I have a slightly older full sibling and we don’t speak, they were my biggest bully from when I can remember and didn’t stop until my mum died- they are toxic (towards the whole family not just me) I also have a younger step sibling who is honestly the most lovely person and always has my back and if they didn’t live far away now we would spend so much time together and also we share a half sibling who I’m very grateful for they are a wonderful person too and I love them dearly and feel so happy and lucky I got my 2 younger siblings.
my 2 younger children are half siblings with my eldest too and they are as close as ever.

whiteroseredrose · 17/01/2026 23:34

Yes. To me, they are my siblings.

Fibrous · 17/01/2026 23:36

Yes, I have two of each type, all my mums. I lived with all of them and have a relationship with all of them. Closest to my nearest sibling in age, though, who is a full sibling, but that’s just because the others are all a bit crazy.

smallsilvercloud · 17/01/2026 23:36

5 half siblings, only stay in touch with one of them.

Anononony · 17/01/2026 23:38

Yes, me and my brother have different bio dads but his (our, i consider him as much mine as his) dad raised me

We get on well, I moved away so we see each other whenever we're back down, our kids adore each other, we mostly communicate via sharing memes/reels otherwise!

I have no idea if my bio dad went on to have more children and have no interest in knowing, I have no contact with any family on that side now

Dr13Hadley · 17/01/2026 23:54

I have a half brother who is 14 years younger than me. He’s 30 now and lives about an hour away from
us with his girlfriend. I see him probably 4-5 times a year and although we didn’t ever live together we are close. We are very similar in personality and have the same sense of humour. He has me in tears with laughter. My kids and husband love him too. He’s my only sibling and I’m his so we cherish that. I’m lucky to have him 😊

TheFireHorse · 18/01/2026 00:26

I have one (that I know of) same age as my grandchild.

Only met them once, at my dad's funeral, actually our dad's funeral.

Poor thing.

Perplexin · 18/01/2026 09:34

Vibted7777 · 17/01/2026 22:55

What made you not want to talk to her

She and I share another sister (my full sister, her half) and she warned me not too.

My full sister did have a relationship with her but she was nothing but trouble so she cut her off and went NC.

QuietDreams · 18/01/2026 09:59

My father has kids with 2 other women, my mother has kids with another man. I’m not interested in a relationship with any of them. I had to put up with them when I was a child and that was enough. So called blended families…bleugh.

LBB2020 · 18/01/2026 10:05

Yes, we all share the same mum and I never refer to them as “half”. We aren’t super close but I think that is more due to there being a large age gap between us (I moved out when they were still very young). We do see and message each other just not regularly. I see one of them more often as they aren’t currently working so easier to arrange meet ups (always with our mum there too)

BonneMamanAbricot · 18/01/2026 10:11

Yes and class them as 'full' siblings. Also have two step siblings who don't see us as family and want nothing to do with us (their choice)