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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:
DaisyChain505 · 17/01/2026 16:27

My brother is my half brother, I didn’t actually meet him until I was an early teen. Now I forget that he’s only half. He’s just my brother to me.

BettysRoasties · 17/01/2026 16:28

Loads I don’t know from what I call merely my donor. In fact @JHound could be one of them 😅

One from my parents. Who I see maybe once or twice a year

Iamacatslave · 17/01/2026 16:30

Two half sisters. Not particularly close as we had very different childhoods.

LLJETO · 17/01/2026 16:30

I have 2 half siblings, but I never think of them that way…to me they’re siblings full stop. It sort of makes me sad when I have to think that biologically they’re ‘only’ half and not full. As you might imagine, we are very very close and I couldn’t love them more.

BertieBotts · 17/01/2026 16:32

I do, from my dad's second marriage. They were born when I was a teenager.

We are friendly but I don't have a close relationship with them as we've never lived together and I didn't see them regularly after I moved out of home when I was 18 or so. I feel fond of them, but I don't really know them aside from the memories of them as very small babies/toddlers.

Freshstartyear25 · 17/01/2026 16:38

Two half sisters on my dad’s side. They are 15 and 17 years older than me. I’ve only met the younger one at my dad’s burial and that was it. Never met the other one though I sometimes check her on social media.
Their mum had an affair and an affair child which was crazy at the time (the 70s) but the older one didn’t want my dad to divorce her so she went no contact with him when she was an adult. Dad later married my mum and had me and my siblings but she wanted nothing to do with us.
Interesting thing was I learnt she got married and divorced her husband 2 years later when he had an affair.

LotsOfSmallThings · 17/01/2026 16:41

I don’t but OH does - his half sister is 20 years younger than him and they are SO close, she’s a year older than both our eldest kids (blended family, DD and DSS are the same age) and best mates with my eldest so practically lives at our house. She goes to OH with near enough every problem she ever has; MIL was a young mum to OH and (obviously) a much older one to, well, I guess she’s technically my SIL but she’s more like a niece! So I think she sees OH as more relatable than her parents so ends up talking to him about everything. They absolutely adore each other and talk (phone/message) all the time.

MadamCholetsbonnet · 17/01/2026 16:54

Yes. I have three half siblings (same father) and one full sibling. We are all very close and refer to each other as “my brother/sister”

DecemberGloom · 17/01/2026 17:03

Both siblings are half. Never made the distinction. Close to both in different ways.

CinnamonBuns67 · 17/01/2026 17:08

All my siblings are half siblings. I have a close relationship with the ones similar age to me, not so much with the ones that were born when I was almost an adult, still have a relationship with them, just not a close one.

Theda13 · 17/01/2026 17:12

Yes. I have two older half siblings. They’re very close with each other, but not close with me, unfortunately. I wish things were different though.

Ohhhthedrama · 17/01/2026 17:14

I have 2 brothers and a sister. We have the same mum different dad's. We all grew up together so even though technically we are halfs I just think of them as my siblings. Close with all of them even though we live in different countries. We have an active group chat and visit as much as we can. I flew long hall last year to attend their dad's funeral.

GentleSheep · 17/01/2026 17:15

Yes, found out about them about a decade ago (in my late 50s). No relationship with them, complicated due to NC with father.

LindorDoubleChoc · 17/01/2026 17:17

I have 3 - a sister and two brothers. They are 15 to 21 years younger than me. Same Dad, different Mum. I have hardly anything to do with them now that my Dad is dead and my step Mum told me he'd written me out of his will and any estate will be left to her children only. It's a shame - I'm very fond of my half sister but not her family!

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.

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.

cadburyegg · 17/01/2026 17:31

Theda13 · 17/01/2026 17:12

Yes. I have two older half siblings. They’re very close with each other, but not close with me, unfortunately. I wish things were different though.

Yes, I could have written this.

I made the effort for years to try and have a relationship with them but they just aren’t interested. A few things happened which made me decide not to bother anymore. So we haven’t spoken in a few years now.

BettysRoasties · 17/01/2026 17:42

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.

I think it makes a huge difference if you grow up in the sand house and without a huge age gap.

Age gap matters even in full biological families if you’ve moved out and mum and dad have a new baby you’re never going to have the same bond as if you grew together.

Wrennie24 · 17/01/2026 17:43

Two younger half siblings that I didn’t grow up with, met them when I was 16 after no contact with father for that time. Get on with them but more like cousins. They are closer to each other and I am closer to my older full brother as we grew up together in the same house.

spindrifft · 17/01/2026 17:44

I'm close to the ones I grew up in the same house as, and not to the ones I saw only occasionally.

Theda13 · 17/01/2026 17:44

cadburyegg · 17/01/2026 17:31

Yes, I could have written this.

I made the effort for years to try and have a relationship with them but they just aren’t interested. A few things happened which made me decide not to bother anymore. So we haven’t spoken in a few years now.

Same here. I idolised them growing up and in recent years I’ve invited them to my house for dinner, and tried to make plans with them. They aren’t interested, so I don’t bother anymore.

Sorry to hear that. It’s an awful feeling, isn’t it?

BlueWalker · 17/01/2026 17:45

One brother. He lives abroad but we're still pretty close. Three half-sisters. I've never met them but I was nearly 30 when the eldest of them was born, plus I'm NC with their/my dad and have been for decades. I don't want to push a relationship and have no idea what they've been told about me so I'm there if they want to contact me and if not, I get it. 2 of the 3 have friended me on social media, so some communication lines are open. But it has to be their decision, I think. Especially at their age, when they're still finding out who they are regardless of a weird family situation.

PissedOffNeighbour22 · 17/01/2026 17:47

My half brother was born when I was 15. He’s in his mid 20s now. Don’t see him often but he sends me a lot of cat videos 😄

edited to say we didn’t grow up in the same household but me and my brother saw our half brother every weekend when my dad had access visits.

FiveGoMadInDorset · 17/01/2026 17:47

6
5 I grew up with from my fathers first marriage all get on well
1 I have never met, he was born between first and second marriage

Reab8 · 17/01/2026 17:51

Have 1 older half sister from my Dad's side. Didn't get to properly know her until teens, her Mum didnt let her have a relationship with us, but my Dad was likely shit on his part too. I feel sorry for her - its obviously affected her, she has lots of issues. I get on with her with when I do see her, even though we are very different people. Always call her 'sister'.