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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

AIBU to cut SIL out finally …

68 replies

Boundaries198 · 11/08/2026 23:38

AIBU to just quietly cut SIL out of my life? (Used AI to help me write this up as it’s a long story!)
Just to say upfront, I’ve used AI to help me write this because there’s years of history and when I try to explain it myself I end up rambling 😂 But the events/opinions are mine.
DH has 3 brothers and 1 sister. His sister has always been difficult/selfish/competitive according to DH – those are his words, not just mine. They had a very privileged upbringing – private schools, amazing holidays, etc – but there has always seemed to be this underlying competitiveness between the siblings.
SIL is very close to MIL. They see each other pretty much every day and SIL talks constantly about her children/their achievements etc. We live nearby too, although barely see SIL.
There have been years of little incidents, but one from years ago has always stuck with me because it happened when I was incredibly vulnerable.
I had just given birth emergency c-section after failed induction - and became very ill. I was in hospital with an infection, had been back into surgery, and my newborn was in NICU being supported with his breathing. I was also about 300 miles away from my own family.
We also had a 3yo DS.
Because of infection/vulnerable babies, the midwife asked DH if possible not to bring our 3yo onto the ward/NICU that day. I believe a couple of babies had fallen ill.
DH therefore asked MIL if she could have our older DS so he could come to the hospital and be with our baby (and me to some extent but I was quite bed ridden and very poorly).
It happened to be SIL’s birthday.
MIL apparently told DH that SIL had said she didn’t want our DS there because it was her birthday and she wanted it to be just her mum and her own DS, who was also 3 at the time.
So DH couldn’t leave our 3yo with MIL and therefore couldn’t come and be with me and our newborn.
That has honestly never left me.
Fast forward about six weeks. Baby and I were finally home after a long hospital stay. I was post-C-section, recovering from infection and still couldn’t drive because of the complications.
I asked MIL whether, just one morning a week for the next TWO weeks, she could take older DS to preschool because I was really struggling physically.
SIL was there and said something along the lines of, “Other people can do it, why can’t you?”
I said because I’m poorly and physically struggling!
I then said fine, DH would have to do it, although it would affect his work. MIL’s response was that she’d speak to DH.
And this isn’t really about those two incidents anymore. There have been years of similar behaviour and I think I’ve reached the point where I simply don’t want a relationship with SIL.
I don’t want a big confrontation. I don’t want DH to stop seeing his sister. I wouldn’t stop the children having relationships with family either. I’m happy to be polite if we’re at the same family event.
I just don’t want her in my life beyond that.
Basically treating her as DH’s sister rather than someone I personally have a relationship with.
Im very close to my brother’s wife and my mum treats her like another daughter. It’s all very different in my family. 🙏🏽
Part of me wonders whether I’m holding onto things that happened a very long time ago. But another part of me thinks that how someone treats you when you’re at your absolute lowest tells you quite a lot.
So AIBU to just keep stepping right back and stop bothering? Or do I need to let the old stuff go?

OP posts:
ALovelyPinkUnicorn · 12/08/2026 07:59

Agree with all who say MIL is just as big a part in the awfulness of all of this, do you honestly think she sees yours and (twat)SIL as equal?
I think she would absolutely ditch them if she asked, and no way would I facilitate their relationship with her.

arethereanyleftatall · 12/08/2026 08:03

Of course step back, you don’t like her, she doesn’t like you, so of course barely see her.

im sorry your baby was in nicu, but you seem to be using this to blame her and your mil, when what about all the other people you could have asked? Maybe some on my list aren’t an option for whatever reason but - your fil, his brothers, any of your family, any friends, a babysitter, a neighbour. If you really only have one person you can call on in an emergency, I’d say you need to widen your circle. And again, with the dropping off for nursery, surely that’s completely his father’s role? For 2 weeks, his job can cope.

you don’t like her, so you’re blaming her for things that aren’t her responsibility

Dozer · 12/08/2026 08:06

Are you the poster who’s posted about all this loads before, without the AI?

MerryUmberHedgehog · 12/08/2026 08:14

My problem would be with the MIL who didnt want to help her son out.

SoBoredOfSelfDoubtHowToGetOut · 12/08/2026 09:03

Boundaries198 · 12/08/2026 06:20

With the children tbh we don’t see them often. Like a PP said it’s usually birthdays 😬 ironically … in saying that when it nephew bday last year we were invited round but asked to pay for our food (takeaway) two things … DH Bro in law is big in business and takes home c. £750k a year in addition when I have people round for birthdays I cater well and they’re always invited and eat well (pile their plates high usually twice over). This year we have not been available for nephew bday!

Why on earth do you invite them?

You are starting to sound like a glutton for punishment.

Netcurtainnelly · 12/08/2026 09:14

THisbackwithavengeance · 12/08/2026 06:45

SIL is a bitch and I would blank her personally. Or tell her to fuck off. You have to stand up to bullies. At the moment she’s the Queen Bee and everyone is afraid of her.

Really, what would happen if you told her to fuck herself?

What disgusting horrible advice, says alot about you.
There are far better ways to go about this without stopping to being foul mouthed.

SoBoredOfSelfDoubtHowToGetOut · 12/08/2026 09:18

Netcurtainnelly · 12/08/2026 09:14

What disgusting horrible advice, says alot about you.
There are far better ways to go about this without stopping to being foul mouthed.

Oh I don’t know.

Being foul mouthed is wonderfully effective sometimes. Not to mention cathartic.

I would far far rather be foul mouthed than someone who refuses to help a man whose wife and child are terribly ill in hospital.

Boundaries198 · 12/08/2026 11:42

No never posted before

OP posts:
Cherrysoup · 12/08/2026 12:08

Sounds like you don’t see her much anyway. Don’t push for her coming round, don’t facilitate any visits there, you’ll barely see her. Your mil sounds like she’s totally enmeshed,

Boundaries198 · 12/08/2026 13:10

MIL is so so so enmeshed it’s uncomfortable to see. And SIL really uses that control she has. Very sad. I think the news of my cousin’s baby’s birth has brought it all back plus my own trauma of being in hospital

OP posts:
Boundaries198 · 12/08/2026 17:13

arethereanyleftatall · 12/08/2026 08:03

Of course step back, you don’t like her, she doesn’t like you, so of course barely see her.

im sorry your baby was in nicu, but you seem to be using this to blame her and your mil, when what about all the other people you could have asked? Maybe some on my list aren’t an option for whatever reason but - your fil, his brothers, any of your family, any friends, a babysitter, a neighbour. If you really only have one person you can call on in an emergency, I’d say you need to widen your circle. And again, with the dropping off for nursery, surely that’s completely his father’s role? For 2 weeks, his job can cope.

you don’t like her, so you’re blaming her for things that aren’t her responsibility

Not at that time we didn’t have anyone we have more people now, don’t you think what they did was pretty shit? All they had to do was take DS with them for lunch with the other 3 year old …

OP posts:
muddyford · 12/08/2026 17:39

When my SIL was widowed (her husband was DH's brother)seven years ago I rang her every couple of weeks for a chat. DH died recently and she hasn't bothered to ring once and it won't be me picking up the 'phone.

SunshineAndFizz · 12/08/2026 17:44

She’s disgusting.

SunshineAndFizz · 12/08/2026 17:52

arethereanyleftatall · 12/08/2026 08:03

Of course step back, you don’t like her, she doesn’t like you, so of course barely see her.

im sorry your baby was in nicu, but you seem to be using this to blame her and your mil, when what about all the other people you could have asked? Maybe some on my list aren’t an option for whatever reason but - your fil, his brothers, any of your family, any friends, a babysitter, a neighbour. If you really only have one person you can call on in an emergency, I’d say you need to widen your circle. And again, with the dropping off for nursery, surely that’s completely his father’s role? For 2 weeks, his job can cope.

you don’t like her, so you’re blaming her for things that aren’t her responsibility

What a ridiculous answer.

Why ask the grandma? Surely in most families this is the first person you’d ask in the circumstances.

And this spoil brat of a SIL doesn’t want her mum to help out her son and family in a time of need. Disgusting behaviour.

Are you honestly saying her reaction is okay? You wouldn’t jump to help your family out?

SoBoredOfSelfDoubtHowToGetOut · 12/08/2026 18:11

arethereanyleftatall · 12/08/2026 08:03

Of course step back, you don’t like her, she doesn’t like you, so of course barely see her.

im sorry your baby was in nicu, but you seem to be using this to blame her and your mil, when what about all the other people you could have asked? Maybe some on my list aren’t an option for whatever reason but - your fil, his brothers, any of your family, any friends, a babysitter, a neighbour. If you really only have one person you can call on in an emergency, I’d say you need to widen your circle. And again, with the dropping off for nursery, surely that’s completely his father’s role? For 2 weeks, his job can cope.

you don’t like her, so you’re blaming her for things that aren’t her responsibility

Not read anything quite so stupid in a long time on MN.

Gotback · 12/08/2026 18:21

I'm sorry you went through all that & your in-laws made it so much worse. And for what? An adult's birthday?! It's actually shocking that people can be so callous.

You're doing the right thing keeping them at bay. I don't think I'd ever be able to see or talk to them again.

Boundaries198 · 12/08/2026 21:07

@SoBoredOfSelfDoubtHowToGetOut@SunshineAndFizz@Gotbackthank you! Thought I was going a bit mad… I guess they’re also local so the preschool was 8 mins drive from me and about 15 from them… fully retired - two car household. Really competent … lead in lots of church stuff, charity stuff - very involved in the community, very easy for them to do that.

OP posts:
Wadsworthy · 12/08/2026 21:48

Seems to me, it’s as much your MiL as your SiL.

But I do feel a bit for her position as the one girl in among 4 boys. Your DH says she was competitive- maybe she just had to work extra hard to keep up with the expectations of her in a family dominated by men?

Boundaries198 · 12/08/2026 22:14

Wadsworthy · 12/08/2026 21:48

Seems to me, it’s as much your MiL as your SiL.

But I do feel a bit for her position as the one girl in among 4 boys. Your DH says she was competitive- maybe she just had to work extra hard to keep up with the expectations of her in a family dominated by men?

Absolutely not at all… she comes first she rules the roost.

OP posts:
Boundaries198 · 13/08/2026 10:56

The men really didn’t and don’t dominate the family it’s massively MIL and SIL. I’ve not forgotten MIL’s actions … but I know it’s partly cos SIL comes first to her… I really do feel for my husband he always plays the clown seeking approval in family gatherings … he even undertakes the same hobbies as FIL to try fit in :( anyway, thanks for the guidance … you’re right I’m going to stop inviting them, of course only if DSs want their cousins at their birthday events, but I’m going to pair it down and not cater so extensively.

OP posts:
Wadsworthy · 13/08/2026 12:43

Boundaries198 · 12/08/2026 22:14

Absolutely not at all… she comes first she rules the roost.

Basically, you just don’t like her. Why shouldn’t she “rule the roost”? You don’t really know what the whole of her life in her birth family has been like - you see only a bit of it.

I dislike it when in-laws presume to know about my relationships with my siblings and parents. They are encroaching.

instead of carping, why not just admit you don’t like her? That would be the honest thing to do.

SugarC · 13/08/2026 13:03

I'm in a similar situation with my BIL GF. I literally keep her at arms length because of the emotional damage she caused to my family. My BIL constantly makes excuses for her behaviour because of past trauma but that doesn't fly anymore.
All you can do is protect your own sanity and control your own actions. Don't engage. Let your DH deal with her. Readjust your expectations with your MIL (accept you will never come first and neither will your kids) and you won't be set up for disappointment in the future.
My kids have my side of the family who have came through time and time again. It's been a hard learning curve for my DH seeing how his family interact with our kids but he can't change that.

Hankunamatata · 13/08/2026 13:08

You literally said in op that you barely see sil. So not sure what you need to cut back from.

Chickadiddy · 13/08/2026 13:10

Of course you are not unreasonable to want limited contact with people you don't like.

But what would this look like in your case?
How exactly do you want to change things?

You can accept that she's a selfish person who irritates you and also accept that you have to have some contact with her due to family circumstances.

Wadsworthy · 13/08/2026 14:01

Readjust your expectations with your MIL (accept you will never come first and neither will your kids)

You see, it’s this kind of statement which puzzles me. Why wouldn’t a mother put her own daughter first? Why would a daughter in law expect to take precedence over a daughter with her mother-in-law?

I'm interested in the thinking here?

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