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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

Brother and Sister relationship and im the third wheel.

31 replies

MyPlumFox · 06/04/2026 16:51

Just want to know if this is weird or is this normal for a close brother and sister relationship. Me and DP have been together for a long time and have always included his sister in events, holidays etc. We recently went on holiday together and whilst there she kept sharing food ofd the same plate with him (e.g. biting something and saying do you want to taste amd giving the rest to him) making sure he has drinks, buying things from the shop for him, sharing ice cream together - I feel bad as I am his DP and should be doing all this for him but she is quick to jump to his needs. I do all this for him when we at home and he does things for me. I ask to share food with my DP on holiday as I don't eat much but he just blanks me. And on the recent holiday they were sitting together all the time and doing activities together so felt like I was third wheeling! I have a sibling and I will do anything for them but not to this length as we are complete opposite in what we like. I did ask him about this and told him how it makes me feel bad but he just said it is what it is.
Is it me or is this normal?

OP posts:
ChristmasChroniclesBookFairie · 07/04/2026 07:52

How rude! His complete disregard for your feelings is alarming. Moving forward I’d refuse to go out with both of them and re-assess your relationship based on the fallout.

AlphaApple · 07/04/2026 08:32

I could not be in a relationship with a man who treated me this way. Stop doing the pick me dance! A 25 year old woman needs to get her own friends, not tag along with her big brother. The whole dynamic is so weird.

nochance17 · 07/04/2026 22:40

MyPlumFox
07:29
@nochance17 this is what it feels like as I feel second all the time. He introduced his sister in a conversation than moments later me.

So you have a choice OP. You can choose to put up with this and play second fiddle to them or you can choose to set yourself free and find someone else who will put you first. They sound very immature for their ages. Your BF at 32 should know better. If he cannot meet your needs and give you the sort of relationship you want, leave them to it and seek happiness elsewhere.

Llamamaman · 07/04/2026 22:44

Ew you think your partner and his sister are attracted to one another. Gross

Merseymum1980 · 07/04/2026 22:44

Sounds gross. Do you have children with this guy? X

2021x · 07/04/2026 23:19

I think you need to throw this one back. They are being intimate in a way that is crossing a line. Nothing you are going to do is going to change that.

You deserve much better.

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