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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

AIBU to be annoyed with SIL behaviour?

41 replies

SugarC · 02/02/2026 08:17

Will try to keep this as short as possible. So just before xmas we had a falling out with BIL & SIL (DH brother & Partner). Both have MH issues and regularly take to Facebook to vent their woes. (Social services being out ro get them, homelessness jot being their fault despite messing up their tenancy, falling out with family in another part of the country, arguments turning physical). This time it was to slag off my family, stating they have had no help (despite us helping them out with social services when they were homeless and previously helping when no one else would because of previous shitty behaviour).
My BIL asked us to give his DP another chance as shes now having another baby (and wants to work on their relationship despite saying she couldn't commit to one man) and is really struggling with a 2yr old and a difficult pregnancy. After some pressure from an unwell MIL we decided to move on from previous animosity and for my nephew's sake, hoping things would improve.
Fast forward to now. My SIL is now back on full swing on Facebook. Seeking advice on what to do about childcare when the new baby comes because she has no help (from my BIL) and his family won't help. My nephew isn't in nursery and she cannot do it alone. She hasn't asked anyone to help (and BIL does everything, as he bloody well should). A part of me thinks this is possibly my fault because of the previous falling out, part of me thinks this is also to spin another narrative to make my family look bad again for not stepping in (again/as always).

AIBU to be annoyed at this? I know it is ONLY a facebook post but it feels goady. My BIL is just as bad as he enables the behaviour and in many ways encourages it. They weren't even in a "relationship" officially when she fell pregnant again the second time apparently. I said it doesn't happen by magic. 😒
I am so worried about my nephew being in that environment. He doesn't understand. They are always fighting and arguing.

OP posts:
Shinyandnew1 · 04/02/2026 14:30

Ah, probably best to have unfollowed or muted her rather than blocking-that increases the drama!

If your mother in law tells you to do things like throw a gender reveal party just tell her you don't want to!

WhatNoRaisins · 04/02/2026 14:37

I think that you need to grey rock this one. Tell your MIL that you don't have the capacity to do these things and don't elaborate.

InterIgnis · 04/02/2026 14:43

SugarC · 03/02/2026 06:46

MIL called me four times yesterday. First two times was to minimize, trying to convince me that I was blowing things out of proportion. Third time was to try and convince me that I needed to host and pay for a gender reveal (even though parents know what they are having) and the last time was to tell me everyone thinks I'm being unreasonable, she suddenly flipped the script when she noticed they would be depending on her to have my nephew (and when she knew DH felt the same way) because her boy is never wrong.

Thank you for the replies.
Detach is the way forward. If there is serious safeguarding concerns moving on I know who to speak to. It's just the chaos and the childishness i'm not used to. No one else I know goes on like this IRL.

Don’t entertain conversation about it, that’s just drawing you in. Disengage, and when your MIL starts just tell her that you’re not going to discuss it with her. Put the phone down if she tries persisting.

Resist the urge to defend, explain, or justify yourself. You don’t need to. They don’t have to like your decision - you don’t need them to.

HoppityBun · 04/02/2026 14:50

If you’re annoyed about what is being said about you, then just leave it.

I’m struck by the fact that your concerns for your nephew take up only two lines and come in right at the very end of a long post.

Are you seriously concerned about your nephew and if so, why doesn’t that come first?

Diamondsareagirlsbestfrien · 04/02/2026 15:11

You and never, ever, ever going to win against someone like that. You can care about your nephew whilst also holding distance.

You seem too involved and upset, mute her on social media and if your MIL etc call about her say I don’t want to get involved.

Diamondsareagirlsbestfrien · 04/02/2026 15:12

You and never, ever, ever going to win against someone like that. You can care about your nephew whilst also holding distance.

You seem too involved and upset, mute her on social media and if your MIL etc call about her say I don’t want to get involved.

Gymnopedie · 04/02/2026 15:18

Where's DH in all this? Why are you getting all the flak?

It's his brother and his mother.

pimplebum · 04/02/2026 15:24

Block her on all socials and ignore
they sound v v hard work

OriginalUsername2 · 04/02/2026 15:25

Do you need to be on facebook? Deleting it gets rid of all this bollocks.

Windday · 04/02/2026 15:41

All sounds very Jeremy Kyle Op.
Perhaps block your MIL as well.
People who really don't want that type of low class drama in their life, don't have it.
They would simply block, and completely refuse to engage.
Try it. Take the silence and peace.
Nothing is worth that type of drama.

SugarC · 04/02/2026 16:15

HoppityBun · 04/02/2026 14:50

If you’re annoyed about what is being said about you, then just leave it.

I’m struck by the fact that your concerns for your nephew take up only two lines and come in right at the very end of a long post.

Are you seriously concerned about your nephew and if so, why doesn’t that come first?

Since before DN was born I was thinking of his welfare before most people in this family.

The recent drama and backstory is what is claiming my attention at the moment. My DN is caught inbetween his parents constantly arguing and my BIL being sent back to my MIL house until it all blows over.

My DH has a strained relationship with his DM. Lots of bad blood they are working through from childhood (to do with parent alienation) and how she treated each of her children. He took a giant step back after his DB had his first major argument with SIL and he moved in with MIL, then went back.
He is also concerned about DN but said its their own making.

OP posts:
pimplebum · 04/02/2026 19:09

two things stand out at me , why did you answer the phone to your mother in law ? And why 4 times ??? Just be busy as work out at the shops helping a neighbour blah blah and cut down her access to your ear

and if she talks to you about them shut it down with a “ I don’t want to talk about family members behind their back I will deal directly with with them “ and refuse to engage change topic it’s not her job to tell you how to engage with family members

second point is mute sil rather than blocking would have caused less drama , as clearly the whole family are Facebook drama lamas

DISENGAGE ! not your circus not your monkeys !

SugarC · 05/02/2026 07:37

Last time I didn't answer her she had a fall, she rang my DH at work. She refused medical help and DH had to leave work to take her to hospital where they discovered she had broken her elbow. I haven't been allowed to live that down. Since i'm "only a volunteer", she thinks i'm available all day.

OP posts:
WhatNoRaisins · 05/02/2026 07:53

Remember OP that you can only help people that are at least somewhat willing to help themselves. Her refusing medical help sounds quite manipulative to me.

Shinyandnew1 · 05/02/2026 10:06

SugarC · 05/02/2026 07:37

Last time I didn't answer her she had a fall, she rang my DH at work. She refused medical help and DH had to leave work to take her to hospital where they discovered she had broken her elbow. I haven't been allowed to live that down. Since i'm "only a volunteer", she thinks i'm available all day.

I'd get a full time job and remove myself from her reach altogether.

Windday · 06/02/2026 12:10

SugarC · 05/02/2026 07:37

Last time I didn't answer her she had a fall, she rang my DH at work. She refused medical help and DH had to leave work to take her to hospital where they discovered she had broken her elbow. I haven't been allowed to live that down. Since i'm "only a volunteer", she thinks i'm available all day.

You are choosing to take on guilt about someone you want to avoid?
Take responsibility for that.
You can tell your husband I don't want to know, your family, keep me out of it.
Lots of people do that successfully in relationships.
You can choose to detach from them.
Who cares what they think of your volunteering.
None of their business

Like i wrote, people who genuinely don't want this low class drama in their lives, do avoid it.

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