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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

AIBU to keep my distance from my difficult sister-in-law?

36 replies

TheotherMrsSmith · 27/05/2026 20:08

Ive always had a tense relationship with my SIL and over the years a number of inappropriate things have been said to
me by her.

At the weekend we were visiting for a family event. We live around 5 hours away so my interactions with her are limited. Given what she has previously said, I don’t message her and don’t seek closeness with her.

So at the weekend was the first time I’d seen her in nearly 6 months at a family party. I was chatting to another family member who was commenting how DD (6) had had a growth spurt since Christmas. I said yes you probably notice it more than we do and then said DD compared to others in her class was one of the younger and smaller ones and some of the others were head and shoulders above. SIL then said very sharply that height wasn’t everything. The family member interjected and said to SIL that’s not what I has said. I then reiterated my comment. SIL then got up and walked away leaving myself and the other family member thinking what was all that about. 5 mins later SIL returns with my MIL hot on her heels coming directly over to
me telling me I needed to go and get a drink. I said I already had one and would get another one when I was ready. MIL insisted I needed to go inside with her.

Once inside she said I’m calling everybody in 1 by 1 to say that if SIL was not herself or quiet it was because she was under stress from her ex husband - this stress has been going on for over 6 years and we are all expected to walk on eggshells around her and I personally think the stress is used to allow rudeness. I said ok thank you for
letting me know but this had been going on for a number of years now and it never seemed to change. MIL acknowledged that. I for myself a drink and went back to the party.

I then later realised that I had been the only person called in for this chat - DH didn’t know about it.

For the remainder of the weekend, I kept my distance from SIL as she has form
for being unpredictable with me and saying things so I made sure I wasn’t alone with her.

It’s now obvious that when I pushed back on what she said, she didn’t like it. I’ve had her make inappropriate comments about my marriage to her brother, shouting at me when she gave me a tour of her house, morally policing what I say etc.

MIL has said we don’t know how to
communicate. I do
know how to
communicate respectfully and have never ever disrespected her in any way but she has me.

This visit I set this boundary and it was evident to all that I had done this as I did not seek her out for 1:1 etc. I cant go no contact and the above is a mild version of what has happened in the past. I think the rest of the family accommodate the eggshells but I find it mentally exhausting.

anybody else have a tricky relationship with SIL and how they’ve navigated things.

OP posts:
bonkersbongo · 27/05/2026 20:57

Mine has main character syndrome and chucks a tantrum at every single family event. Everyone treads on eggshells around her, pil buzz around trying to keep her happy and I can never say a thing right lol. It’s bizarre

TheotherMrsSmith · 27/05/2026 20:35

PoppinjayPolly · 27/05/2026 20:31

Urg bollocks to that, not a chance for anyone contact! Creeepy!!

I’m the only one who thinks this too. I’ve been told I’ve blown it out of context.

OP posts:
PoppinjayPolly · 27/05/2026 20:31

TheotherMrsSmith · 27/05/2026 20:18

DD is still young, but I don’t allow too much 1:1 as she confused DD by telling her she was her second mummy.

Urg bollocks to that, not a chance for anyone contact! Creeepy!!

RudolphTheReindeer · 27/05/2026 20:19

Is she my sil? I just avoid mine too.

TheotherMrsSmith · 27/05/2026 20:18

PoppinjayPolly · 27/05/2026 20:15

This, how are they around dd? Is she going to get told to pander to SIL as well?

DD is still young, but I don’t allow too much 1:1 as she confused DD by telling her she was her second mummy.

OP posts:
PoppinjayPolly · 27/05/2026 20:15

DavidStopActingLikeADisgruntledPelican · 27/05/2026 20:14

It’s not only your SIL that’s the problem by the sound of it- it’s every other person (like your MIL) who is feeding into this self obsessed narrative, insisting that people walk on eggshells around SIL. I’d stop socialising with them for a while and depending on how I felt I would tell them why.

This, how are they around dd? Is she going to get told to pander to SIL as well?

icedcoffeetomyveins · 27/05/2026 20:15

I nod with bland facial expressions to everything my SIL directs at me, irregardless of how offensive it is. All I reply is "fair enough". I politely excuse myself from conversations as much as I can - she has started doing the same so we barely have to interact.

As long as I'm not directly confrontational the rest of my ILs are just glad the peace is being kept and they can pretend we all get along.

DavidStopActingLikeADisgruntledPelican · 27/05/2026 20:14

It’s not only your SIL that’s the problem by the sound of it- it’s every other person (like your MIL) who is feeding into this self obsessed narrative, insisting that people walk on eggshells around SIL. I’d stop socialising with them for a while and depending on how I felt I would tell them why.

WhatNoRaisins · 27/05/2026 20:13

I get having a difficult family member. It sounds like your MIL has been managing her relationship with other people for a while and sees it as her job. My only advice is keep her on an information diet so she has less to use against you and have very low expectations for how she will behave.

Justmuddlingalong · 27/05/2026 20:12

I'd ignore SIL at family get-togethers and smile and nod at the flying monkeys.

Mydogisagentleman · 27/05/2026 20:11

I loathe my sil.
I refuse to see her and won't attend her funeral.
Nasty,selfish manipulative lazy cow