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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

AIBU to say no to being my step sister's birth partner?

136 replies

WayAhead · 29/08/2026 16:28

I have 2 sisters, a half brother and a step sister.

I was a birth partner for one of my sisters, along with her husband, 10 years ago when she had my nephew and then again when she had my niece 6 years ago.

My step sister is currently pregnant and has asked me to be her birth partner. I have thought about it and I don’t want to. She doesn’t want her partner there and he doesn’t want to be there anyway and she doesn’t feel comfortable asking anyone else. We are not close though and I really can not imagine being in the room when she gives birth.

She is due mid October and I was hoping to go away for half term with my husband and children*, so if I agreed to be her birth partner, that would possibly put an end to those plans.

She hasn’t asked my sister and I’d say we have the same relationship with her, not that I know of my sister would be willing. She has friends. AIBU to say no? I don’t want to hurt her so how do I say no without saying I just don’t feel close enough to her to be her birth partner.

  • Post edited - originally said 'husband and partner' - OP meant to say 'husband and children'
OP posts:
WayAhead · 29/08/2026 22:42

MNLurker1345 · 29/08/2026 22:26

@WayAhead I have attended many C section births during my time working in the NHS, I have given birth, once, I have been been birth partner to my DGD15, along with her DF.

It is a huge experience!

Your DSSis, has put a huge burden on you by asking this of you. You are not close, she knows this also, but under the circumstances she just wants someone there that is a strong, stable person and she has identified that in you. It isn’t actually personal believe it or not. Her circumstances don’t sound great, this has more bearing. She doesn’t feel she should be alone. Although there is nothing wrong with being alone. I actually chose to be alone, until I heard my DGM calling my name when she got wind that I had quietly taken myself off to the hospital alone. Times have changed.

As I said, I have attended many C section’s, under anaesthetic or epidural. I was
never close to those mothers, sometimes on their own, sometimes with DHs/DPs/BPs. But when that baby is delivered, it is a miraculous moment.

But saying all of that, if you really do not want to do it, you should absolutely not do it and not feel guilted in to doing it. Just say, kindly, I can’t do it.

That is not a job I would ever choose. The moment a baby being delivered isn’t always a miraculous moment so with respect, that’s bollocks. 😬 It was just the start of even more stress in my own births and one of my sisters. Poorly mums and in my own case a poorly baby and me rushed for surgery. Nothing miraculous I’m afraid. Going through that for someone I’m not close to isn’t something I’m going to do due to it bringing up past trauma for me. I’m glad I did it for my sister but it’s not something I can do for my step sister as we are just not close enough.

OP posts:
WayAhead · 29/08/2026 22:43

Aiming4Optimistic · 29/08/2026 22:40

Yeah, you're not the right person. She deserves to have someone who cares about her and that's clearly not you.
I can't imagine how anxious she must be feeling, to ask you, but not your problem right?

No, it’s not. Thanks for your understanding. 🙄

OP posts:
MilkBreadToiletroll · 29/08/2026 22:50

I don't think you need to see it as a burden. Its a request you can say no to, giving her plenty of time to think of alternatives. It sounds like you're not an ideal choice due to previous experiences, so you can bow out gracefully.

WayAhead · 29/08/2026 22:54

Mumtobabyhavoc · 29/08/2026 22:34

I'd say that I've done it twice and just can't face doing it again emotionally.
I'd also say her partner needs to step up to support her and the reasons given for him not being present are extremely unsupportive and immature.

That’s a good idea thank you. I will be vague and say I would find it too emotional due to my own experiences (as that covers many things) and also that with possibly going away, I’m not the best person.

I’ve only met her partner once and he seemed like an idiot. His reasons are very immature but my step sister thinks it’s valid. She not the most mature person either. I really can’t see their relationship lasting through the sleepless newborn stage, never mind longer. Poor kid. 😞

OP posts:
MNLurker1345 · 29/08/2026 23:03

There you go, says it all. It is not for you and rightly you must say no. No guilt.

Your step sister, does not need to know your trauma. As I said her asking you is most probably not personal. It is most probably down to the fact that she feels she needs to have a birth partner rather than going it alone.

I have attended also many C section births that have not gone well, was just trying to be delicate. My DSis ended up in ICU and has PTSD as a result, 12 years on.

BinNightTonight · 29/08/2026 23:04

At first I was thinking aww but she has nobody else, until I read that you last saw her on NYE and her reasons for not having her boyfriend there are very daft.

I would love to be someones birth partner (my own was traumatic, but in a weird way I'd like to experience it from a different point of view) but someone I am close to. Its a deeply intimate, personal moment.

A doula may be a good idea, or her and her boyfriend just growing up may be cheaper...

Pinkissmart · 29/08/2026 23:05

SquigglePigs · 29/08/2026 16:51

Honestly I'd say yes in your shoes. It might not be ideal but imagine how it feels for her if you're the only person she can ask. It might be the making of your relationship.

I agree with this.
However, if you really don’t want to, then I would tell her you already booked to be away

WayAhead · 29/08/2026 23:17

MNLurker1345 · 29/08/2026 23:03

There you go, says it all. It is not for you and rightly you must say no. No guilt.

Your step sister, does not need to know your trauma. As I said her asking you is most probably not personal. It is most probably down to the fact that she feels she needs to have a birth partner rather than going it alone.

I have attended also many C section births that have not gone well, was just trying to be delicate. My DSis ended up in ICU and has PTSD as a result, 12 years on.

I would not tell her about my births as we are not close enough to talk like that and also I’m not one of those women who wants to tell pregnant women their horror birth stories.

I don’t understand how you were being delicate by saying the moment the baby comes out is miraculous. It did feel like you were trying to sell the idea of being with her during her birth. It’s very often not miraculous as you know of it’s your job. It took me years to be able to even watch a birth scene in a film after I had my own children.

OP posts:
SouthLondonMum22 · 29/08/2026 23:21

Aiming4Optimistic · 29/08/2026 22:40

Yeah, you're not the right person. She deserves to have someone who cares about her and that's clearly not you.
I can't imagine how anxious she must be feeling, to ask you, but not your problem right?

OP's stepsister made the decision to continue with a pregnancy in a new relationship.

OP's stepsister has decided that she doesn't want her boyfriend at the birth.

No, it isn't OP's problem. It really isn't.

Mumtobabyhavoc · 29/08/2026 23:28

WayAhead · 29/08/2026 22:54

That’s a good idea thank you. I will be vague and say I would find it too emotional due to my own experiences (as that covers many things) and also that with possibly going away, I’m not the best person.

I’ve only met her partner once and he seemed like an idiot. His reasons are very immature but my step sister thinks it’s valid. She not the most mature person either. I really can’t see their relationship lasting through the sleepless newborn stage, never mind longer. Poor kid. 😞

Could I add: make sure you do go away; call her to wish her well before you go and send flowers after she has the baby and a nice gift. 🙂

MNLurker1345 · 29/08/2026 23:28

WayAhead · 29/08/2026 23:17

I would not tell her about my births as we are not close enough to talk like that and also I’m not one of those women who wants to tell pregnant women their horror birth stories.

I don’t understand how you were being delicate by saying the moment the baby comes out is miraculous. It did feel like you were trying to sell the idea of being with her during her birth. It’s very often not miraculous as you know of it’s your job. It took me years to be able to even watch a birth scene in a film after I had my own children.

Me too, I still can’t. I burnt out, I do not work in the NHS anymore. I have a phrase that sums up my experience, which I wouldn’t even use
on MN, so believe me, I was being delicate.

I was not trying to sell anything. Healthy child birth is miraculous. Sadly and sometimes tragically it is not always.

SALaw · 29/08/2026 23:37

SouthLondonMum22 · 29/08/2026 22:06

Having sex is a personal experience too though. It's her choice not to have her partner there but that doesn't mean it is OP's responsibility to take her partners place when she very clearly doesn't feel comfortable with it.

I didn’t say it wasn’t? I didn’t say the OP couldn’t say no? I said that the step sister knows it’s a personal experience. If the OP says “it’s a personal experience” she will surely reply “I know”. So the OP needs a different thing to say.

JLou08 · 29/08/2026 23:38

Ooo that's cold. I don't think there's anyway to tell her without hurting her. You obviously mean a lot more to her than she means to you and it is going to hurt her when she finds that out, at one of her most vulnerable times too. I couldn't say no to someone if it would risk them giving birth alone.

SALaw · 29/08/2026 23:39

WayAhead · 29/08/2026 22:11

She knows we are not close and it will be awkward. It’s not to do with her wanting to share this with me, it’s just that she doesn’t seem to have anyone else. She can’t possibly feel close to me. We hardly see each other. We last saw each other on New Years Eve. We haven’t had the best relationship in the past and we’ve never had a deep conversation but we are civil as my mum married her dad. She is using me for convenience because I’m a woman who has given birth. She doesn’t want the new bloke there as they are both scared he’ll ’go off her’ if he sees her like that. I find it hard to deal with that level of twattiness.

You said she did have other people to choose from but now you think she has no one else to ask if it isn’t to be the partner?

Epdrenching · 29/08/2026 23:54

Yanbu at all.
You are not close.
She is a step sister through marriage.
Not all blended families have children that become close.
It is a hugely personal experience and why would you want to share it with someone that you are not close to, simply because they feel it suits them to have you there.

Sharing the birthing experience with someone like that, who is having a baby with someone they met 5 minutes ago, leaves you wide open to be her go to person afterwards because of the experience.

If you are not close to her, yanbu to not wish to be involved.

WayAhead · 29/08/2026 23:57

SALaw · 29/08/2026 23:39

You said she did have other people to choose from but now you think she has no one else to ask if it isn’t to be the partner?

She has people in her life. I’ve mentioned her partner, friends and my sisters although I’m not sure my sisters would do it either. For whatever reason, she hasn’t asked them, so yes, it’s doesn’t seem like she anyone else. If I’m the closest she has, I’m not sure what to say. It doesn’t make it my responsibility. We are not close.

I don’t want to hurt her or add to any stress she may be feeling as she is heavily pregnant. The thread has helped me word a message to her which I will send tomorrow giving her time to find someone else. I will also send a message to my sisters to warn them she may ask and so they can have time to think it over if they need to.

OP posts:
WayAhead · 30/08/2026 00:02

JLou08 · 29/08/2026 23:38

Ooo that's cold. I don't think there's anyway to tell her without hurting her. You obviously mean a lot more to her than she means to you and it is going to hurt her when she finds that out, at one of her most vulnerable times too. I couldn't say no to someone if it would risk them giving birth alone.

I’m not cold, I just don’t have much of a relationship with her. She hasn’t shown much interest in me ever and this has come out of the blue. She must be desperate is all I can say and is using me because I’m a woman who has given birth that is vaguely connected to her. I do feel for any woman facing birth alone if it’s not what they want but I know I am not the person for this.

I will be as kind as I can be in my message and wish her well.

OP posts:
WayAhead · 30/08/2026 00:05

SALaw · 29/08/2026 23:37

I didn’t say it wasn’t? I didn’t say the OP couldn’t say no? I said that the step sister knows it’s a personal experience. If the OP says “it’s a personal experience” she will surely reply “I know”. So the OP needs a different thing to say.

Thanks to a suggestion on the thread, I’ve said I’m going to say it will be too emotional for me due to my experiences, and with us probably going away around the due date, I can’t do it but I wish her all the best.

OP posts:
DexTheDoggo · 30/08/2026 00:37

WayAhead · 30/08/2026 00:05

Thanks to a suggestion on the thread, I’ve said I’m going to say it will be too emotional for me due to my experiences, and with us probably going away around the due date, I can’t do it but I wish her all the best.

That sounds like a good message to send OP. Enjoy your holiday.

thornbury · 30/08/2026 03:13

Both my deliveries took place without the father or a birth partner present. The midwives and other staff were great and I found them more than enough. Having someone there who I wasn't close to, and who didn't want to be there, would not have been better. The second delivery was much more straightforward than the first and I had one midwife throughout with another dropping in for key moments. It helps if you get all of it done in one shift, though! With the first, I went through 4 shifts from admission to delivery (day staff, night staff, day staff, night staff again!)

thepariscrimefiles · 30/08/2026 07:47

JLou08 · 29/08/2026 23:38

Ooo that's cold. I don't think there's anyway to tell her without hurting her. You obviously mean a lot more to her than she means to you and it is going to hurt her when she finds that out, at one of her most vulnerable times too. I couldn't say no to someone if it would risk them giving birth alone.

OP has said that she and her step-sister hardly have a relationship at all. They have never been close and her step-sister has never wanted a closer relationship with OP. This request has come totally out of the blue.

The reason why her boyfriend won't be her birthing partner is that they both think that seeing her give birth would 'put him off her'. I genuinely can't even think of a twattier reason for the father of the baby refusing to support the mother during labour and the birth of their baby.

OP obviously still has PTSD from her own difficult birth and she found being her sister's birthing partner extremely traumatising. She, quite understandably, doesn't want to go through this again for her step-sister.

WhatNoRaisins · 30/08/2026 07:58

I think that given that you're not close and you'd have to scrap holiday plans with your partner and children to be a birth partner it's too much to ask. I'd say no, you're not able to do this.

Bluenotgreen · 30/08/2026 08:11

Just say you can’t as you are going on holiday that week.

ALovelyPinkUnicorn · 30/08/2026 08:30

thepariscrimefiles · 30/08/2026 07:47

OP has said that she and her step-sister hardly have a relationship at all. They have never been close and her step-sister has never wanted a closer relationship with OP. This request has come totally out of the blue.

The reason why her boyfriend won't be her birthing partner is that they both think that seeing her give birth would 'put him off her'. I genuinely can't even think of a twattier reason for the father of the baby refusing to support the mother during labour and the birth of their baby.

OP obviously still has PTSD from her own difficult birth and she found being her sister's birthing partner extremely traumatising. She, quite understandably, doesn't want to go through this again for her step-sister.

This, it looks like the step sis sees op as a commodity to be used as a tool.
if they were so close, I’d assume she’d have been there at the ops births or after, helping with the dc?
Or am I assuming correctly… your dc would have no idea who she is @WayAhead ?

PancakeCloud · 30/08/2026 08:52

WayAhead · 29/08/2026 17:39

Thanks for dismissing my feelings as mild discomfort. 🤔

I would feel extremely uncomfortable because we are not close. My own births also add to my discomfort. I was there for my sister because I love her and I’m close to her, but have said I was very anxious.

But it does sound like mild discomfort (or mild anxiety if you like) vs the scary experience for your stepsister of giving birth with a very limited support system.

You can say no, but I feel really sorry for your stepsister. Could you contribute to a doula to support her instead at least?