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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

AIBU to want to tell colleague’s wife about his workplace affair?

320 replies

Berrylipshade · 12/03/2026 20:28

Name changed for this.
I’m watching an affair play out in work. Been going on for a long time. Everyone knows. Not at all discreet. Today it was bad, cuddling, neck stroking, hands in hair, in plain sight of a few of us, and leaving for “lunch” together.
He is a horrible arrogant man. His poor wife & young kids.
I hear him telling clients about his wife and comes across as so devoted. He’s a pig.
The one he’s shagging is single, but an obnoxious flirt. The whole thing just makes me so annoyed.
i wish I could not care.
but i keep plotting to leak this to his wife.
is that wrong?

OP posts:
InterIgnis · 12/03/2026 23:45

Elmer83 · 12/03/2026 23:41

I agree! It’s actually scary to see the comments from other posters. I can only assume they must be the sort capable of such affairs?

I have never cheated or been the other woman.

I am not inclined to act as moral arbiter and make someone else’s affairs my business. I would be especially disinclined to do so if it could potentially cost me my job and/or career.

LiviaDrusillaAugusta · 12/03/2026 23:43

Elmer83 · 12/03/2026 23:38

Who would like a pair of scumbag cheaters?

Well most people are more than one thing. A really good friend of mine many years ago cheated on his wife. The situation was complex, the relationship was messed up at the time and she was a shitty person (she did some horrible things to a lot of people). It didn’t make him public enemy number one.

Harriethulas · 12/03/2026 23:41

I would 10000% send an anonymous note to her home address just saying ‘he’s sleeping with ‘X’ . Then let her do what she wants with the info. I never get involved with other people’s drama but I think I’d make an exception for somebody this blatant and piggish. Makes me sick.

Elmer83 · 12/03/2026 23:41

OPthefirst · 12/03/2026 23:38

His wife should know. He is risking her health and the health of his family. Creep.

I agree! It’s actually scary to see the comments from other posters. I can only assume they must be the sort capable of such affairs?

researchers3 · 12/03/2026 23:39

StrawberryElephants · 12/03/2026 20:45

Report to HR... if they find out and have a word - he will likely shit himself and realise there is a strong chance his wife would find out - because he is obviously not as sneaky as he thinks.

Or speak about his wife and kids infront of the other woman. See if you can do it so your eyes meet in silence just for a split second. Hopefully she will feel the shame, even if this pig doesnt.

I wouldn't have thought so given how brazen they both are! Anyway, it's the husband who should feel the most shame.

OPthefirst · 12/03/2026 23:38

Iwiicit · 12/03/2026 20:32

Keep well out of it. Not your circus, not your monkey. Just get on with your job professionally, if you value it.

His wife should know. He is risking her health and the health of his family. Creep.

Elmer83 · 12/03/2026 23:38

LiviaDrusillaAugusta · 12/03/2026 23:34

And OP admits she loathes both of them so a previous poster questioning her motives was reasonable to do so. Don’t get me wrong, when I don’t like someone, I’m tempted to take some kind of revenge but it’s not worth it

Who would like a pair of scumbag cheaters?

NormasArse · 12/03/2026 23:35

I would, but not sure how.

LiviaDrusillaAugusta · 12/03/2026 23:34

And OP admits she loathes both of them so a previous poster questioning her motives was reasonable to do so. Don’t get me wrong, when I don’t like someone, I’m tempted to take some kind of revenge but it’s not worth it

AcrossthePond55 · 12/03/2026 23:32

@Berrylipshade

I'm always in the 'tell' gang BUT I think in this case you have to think of your job first.

It sounds to me as if this couple has been a hot topic of conversation at work. So if there is the least chance it could be traced back to you, then I'm afraid you have to put your job first. So if you've ever said anything at work, even the least hint that the wife should be told, then keep quiet and hope that somehow she finds out. You aren't required to set yourself on fire to keep this man's wife warm if it means you lose your job.

But if you haven't said anything about the wife needing to be told, haven't been extremely 'vocal' in your disapproval, and if you can keep it completely anonymous, then I'd probably tell her. But you need to be sure you're a good enough liar if it gets back to the office that 'someone' told. You may decide that even that risk is too much to take. Oh, and if you do tell, keep your mouth shut about it!!

LBFseBrom · 12/03/2026 23:31

Iwiicit · 12/03/2026 20:32

Keep well out of it. Not your circus, not your monkey. Just get on with your job professionally, if you value it.

Agreed.

DirtyBird · 12/03/2026 23:31

If I was the wife I would want to know. How humiliating for her.

CleanSkin · 12/03/2026 23:31

You’re not BU for wanting to tell his poor wife. But I think you would be if you decided to actually do it; you need to act professionally, as others have said.
Their behaviour at work is completely inappropriate, so I think that very discretely to HR is the correct route, and soon.
Would this be a whistleblowing act, given the disruption they are causing in the workplace and the morality deceit of clients where he is representing the business?

Elmer83 · 12/03/2026 23:29

InterIgnis · 12/03/2026 21:11

Just don’t. If it blows back on you, as such things often do, you’ll be the one to pay for it.

It can ruin not just your current job, but your career in an industry too.

How? When she’s standing up and supporting a betrayed woman? If it did then she’d have an employment tribunal to win!

LiviaDrusillaAugusta · 12/03/2026 23:23

Elmer83 · 12/03/2026 23:17

I couldn’t morally care if it did…I’d rather let another woman know her husband was cheat

Why would you do that if you don’t know her? Perhaps she’s an unpleasant person. Perhaps she won’t care. Perhaps it will send her into a mental health spiral. And yes I know it’s the husband’s doing but the OP knows little of the actual situation.

if someone sent me an anonymous note I would be really upset by that fact more than the content. I would be worrying who knew, had they been laughing at me behind my back etc.

As it is the OP who has an issue with the morality, she needs to decide whether she can continue working in that situation or not. She can only be responsible for her own reactions.

ItfinallyappearsHarry · 12/03/2026 23:19

canisquaeso · 12/03/2026 22:24

Tell her anonymously.

I was cheated on in similar circumstances and frankly the fact everyone knew and said nothing hurt just as much, if not more. I felt like I had been walking around like an absolute full for months, I was so embarrassed I didn’t want to leave my home.

Plus there’s also the issue that he might be compromising her sexual health.

I’m sorry you went through this canisquaeso
it must have been devastating.

The trouble is, an anonymous note can have the same effect; I think the embarrassment and the sense that other people knew before you is hard to escape, whenever someone finds out.

Elmer83 · 12/03/2026 23:17

MeganM3 · 12/03/2026 20:29

I’m not sure. If it could come back to you in any way I wouldn’t.

I couldn’t morally care if it did…I’d rather let another woman know her husband was cheat

LiviaDrusillaAugusta · 12/03/2026 23:15

ItfinallyappearsHarry · 12/03/2026 23:09

I agree that op should keep out of it and not say anything to the wife in this situation, but I think the fact that you can only think of nasty reasons why she would want to do so, says more about you BatchCookBabe than her.

Happily we are not all the same. I definitely try and support other women when it’s appropriate and when I can. In the past, I’ve been really grateful for support from older female mentors in my work place and I try and pass the favour on.

Fair enough! The thing is, we don’t expect men to do that, it’s all part of the reductive thinking that women should be nice to everyone, regardless of their feelings.

I have been bullied by women in the workplace far more than men so I’m not minded to subscribe to the sisterhood.

Im autistic so if I care about someone I am fiercely loyal but outside of that I’m a bit meh with most people, 😬

Beaniebobbins · 12/03/2026 23:12

Have you spoken to anyone else at work about this? Do any of your other colleagues feel the same way? A complaint to HR about inappropriate behaviour might carry more weight if multiple people make it.

i don’t think it’s your responsibility to out his affair to his wife. I personally wouldn’t meddle in someone else’s relationship, especially not when I didn’t really know her. But some of your colleagues might feel differently, or know her better, and might be better people to talk it over with.

but whatever happens don’t send an anonymous message. That is a horrible way for anyone to find out something like this. If you decide to tell her she needs to be talked to like a decent human being and checked that she is ok and checked that she has somewhere safe to be. You don’t know anything about the dynamics of their relationship, there may be abuse which could be emotional or otherwise, and this could put her in an incredibly difficult or even dangerous position. I feel like some people want to punish the cheating husband, and yes he deserves it, but his wife doesn’t, she deserves care, respect and support (unless she’s also up to no good, in which case they deserve each other) not someone throwing a grenade into her life and then walking away.

Mumsgirls · 12/03/2026 23:11

As a teenager I saw this at work, went on for years. Some of our staff socialised regularly with the girlfriend , then wife. They attended the wedding knowing what he was up to.At the time all the office knew, I was very young and did nothing..Many years later I regret not telling her anonymously. It is something as a mature woman, that we all let her down

ItfinallyappearsHarry · 12/03/2026 23:09

BatchCookBabe · 12/03/2026 22:48

Exactly. I don't subscribe to the non-existent 'sisterhood' either. Women only support women when it suits them.

And why the OP thinks this is anything to do with her when she doesn't even know this man's wife just baffles me. Sounds to me like she either fancies him herself, or she hates him so much that she wants to tell his wife about the affair because her hatred of him makes her want to ruin his life.

Her fancying him - or hating him so much that she wants to upend his life - are far more likely scenarios, than altruism, or her being 'kind' to the wife.

No way is the OP doing this for the non-existent sisterhood. 🙄

.

Edited

I agree that op should keep out of it and not say anything to the wife in this situation, but I think the fact that you can only think of nasty reasons why she would want to do so, says more about you BatchCookBabe than her.

Happily we are not all the same. I definitely try and support other women when it’s appropriate and when I can. In the past, I’ve been really grateful for support from older female mentors in my work place and I try and pass the favour on.

LalaPaloosa2024 · 12/03/2026 23:09

I had the same issue many years back. A “friend” really had a go about me when I suggested I let the wife know. Raised her voice at me and called me vindictive. I was shocked. (And no, she hadn’t gone through the same thing as the wife)

LiviaDrusillaAugusta · 12/03/2026 23:09

tachetastic · 12/03/2026 23:00

Next time they do it could you loudly ask him what his kids are getting his wife for mother's day?

genuinely - why? She presumably knows he’s married with kids, HE presumably knows he married with kids so all it achieves is making the commenter look unhinged

MasterBeth · 12/03/2026 23:01

Whyherewego · 12/03/2026 20:32

Not your place to inform her. I'd inform HR about the relationship as often relationship at work needs to be declared. But not his wife. I wouldn't get involved.

You wouldn't get involved by telling the HR department?

tachetastic · 12/03/2026 23:00

Berrylipshade · 12/03/2026 20:28

Name changed for this.
I’m watching an affair play out in work. Been going on for a long time. Everyone knows. Not at all discreet. Today it was bad, cuddling, neck stroking, hands in hair, in plain sight of a few of us, and leaving for “lunch” together.
He is a horrible arrogant man. His poor wife & young kids.
I hear him telling clients about his wife and comes across as so devoted. He’s a pig.
The one he’s shagging is single, but an obnoxious flirt. The whole thing just makes me so annoyed.
i wish I could not care.
but i keep plotting to leak this to his wife.
is that wrong?

Next time they do it could you loudly ask him what his kids are getting his wife for mother's day?