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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:
icreatedascene · 13/03/2026 06:19

My DSIS got a phonecall from her husband's colleague, asking to meet her as she wanted to tell her something. DSIS was very grateful, he'd been having an affair with a colleague openly in the workplace and felt DSIS should know. He blamed it on a mental elf episode Hmm and they got back together a few months later after going to counselling and him "finding God". The 'informer' got sacked, BIL had another workplace affair a year later and they have been married for years now. My point is, the messenger often gets shot here, so tell her anonymously if you have to, giving enough details so that she will know it's not some random letter/email.

DeepRubySwan · 13/03/2026 05:57

Berrylipshade · 12/03/2026 20:52

So, the company is already kind of toxic. These two people are senior, are very valued by the owner, and seem to be matey with the (only) HR person we have!

Yet another reason to stay out of it.

rockinrobins · 13/03/2026 05:55

If you put yourself in the wife's position, do you feel like you'd want to be told?

I think I would.

DeepRubySwan · 13/03/2026 05:54

I would personally stay out of it.

dottiedodah · 13/03/2026 05:42

I think his wife may know or suspect. He sounds grim! I would keep out of it though.Especially if he's senior in any way

Zanatdy · 13/03/2026 04:37

I personally would just stay well out of it if it was my boss. Yes it’s morally wrong, but not my circus and I wouldn’t want my career impacted from getting involved.

Inmyuggs · 13/03/2026 04:29

This reply has been deleted

This has been deleted by MNHQ for breaking our Talk Guidelines.

Isittimeformynapyet · 13/03/2026 03:26

Nando123 · 12/03/2026 20:47

My husband has just left me for a woman he met at work. I caught him messaging her on New Year's Eve.
I would want to know. Especially as it's obvious he's seeing her and work colleagues know. I mean it's up to you, it will come out eventually. These things always do.

it will come out eventually. These things always do.

We don't know that though. We only know about the ones that do come out.

So sorry about your cheating fucker. I've been cheated on (not married) and it's such a sucker punch.

Onwards @Nando123 and in time, upwards 💐

Ophir · 13/03/2026 03:15

I’ve been the wife. I knew he was having van affair but he denied and denied and made me feel I was going mad.

Someone from his office sent me an anonymous message to tell me. I am glad they did, although it was awful. Although I’m still plagued ten years on by who it was, and I’d normally say don’t do it anonymously but I see why in your case.

Tell her @Berrylipshade

Plasticdreams · 13/03/2026 02:36

Do it anonymously. I would definitely tell her.

Scorchio84 · 13/03/2026 02:22

User0311 · 12/03/2026 20:55

I don’t agree with it either but I wouldn’t get involved

I have to agree, you don't know his wife, as in she's not your friend & inevitably he will smarm his way out

"sisterhood" whatever that means extends to friends, colleagues is way more grey murky

Grannygherkin · 13/03/2026 02:13

Secretly video the shenanigans at work on your phone and send anonymously to his poor wife. I would want you know if I was being cheated on, and evidently after I left my ex I was told by another gent that the ex had had it on with a friend of ours.....he even told me her name so had yo be true.

NNforthispost · 13/03/2026 01:42

Bigcat25 · 13/03/2026 00:59

Maybe tell her anonomously. Let her know their lunch plans so she can see for herself or hire an investigator if she wants to. Giving her some detail affirms that it's not just a malicious lie.

I was going to suggest this. Then she can turn up and see for herself.

Yes, tell her, but be anonymous to protect your own job. Even if you plan to leave - stay anonymous.

But give her enough detail so she can check it out herself and gather evidence.

Mummyof2andthatsenough · 13/03/2026 01:35

Please tell her anonymously! Ok imagine if the shoe was on the other foot and noone told you! Sounds like he's having his cake and eating it and he is due some humble pie!

Iusedtobefun95 · 13/03/2026 01:25

Iv been the wife in this situation, my ex was cheating on me with a girl he worked with and no one told me I only found out because his friend ended up telling me when he found out months into it. Apparently the whole restaurant they worked in knew and also knew I was at home with two small children one a few weeks old when it started, I wish I’d been told sooner. Make a fake facebook account and message her or something like that what she does with the information then is up to her

Bigcat25 · 13/03/2026 00:59

Maybe tell her anonomously. Let her know their lunch plans so she can see for herself or hire an investigator if she wants to. Giving her some detail affirms that it's not just a malicious lie.

ilovesooty · 13/03/2026 00:43

Berrylipshade · 12/03/2026 20:36

I don’t know her, no.

So don't get involved.

Daygloboo · 13/03/2026 00:40

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?

Yes, tell her secretly. He's a pig and you'd do her a massive favour to help her to make the decision to get out while she still has a shot at rebuilding her life rather than wasting 20 years on a sleazeball.

ExBert80 · 13/03/2026 00:20

I would tell HR anonymously, on the basis the public displays of affection are noticeable, uncomfortable to watch and unprofessional, but not his wife.

IsThistheMiddleofNowhere · 13/03/2026 00:14

I wouldn't tell his wife. It would be far more effective if you confronted him about it and told him how unprofessional and embarrassing his behaviour is and how uncomfortable it is for everyone when you all know he is married. Someone needs to be brave enough to say this with everyone else present as support in case he gets overly defensive

LiviaDrusillaAugusta · 12/03/2026 23:53

If it’s untenable to the OP, presumably job hunting would be a good plan. Because whatever happens if she tells the wife, it’s not going to be any more pleasant afterward

HRTQueen · 12/03/2026 23:51

Of course not this isn’t anything to do with you

it it’s impacting your work you go and see hr

if she was a friend and you could support her that is different

It has nothing to do with respecting women it’s so do with you can’t go around acting like the morality police

InterIgnis · 12/03/2026 23:50

Elmer83 · 12/03/2026 23:29

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

Edited

Because if both parties are well regarded, and connected, it wouldn’t be difficult for either to poison the proverbial well for OP.

Winning a tribunal would require her to have evidence that this is what had happened, which is far easier said than done.

LiviaDrusillaAugusta · 12/03/2026 23:48

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?

Or the sort that don’t believe in getting involved in the relationships of other people just because they don’t like them

LiviaDrusillaAugusta · 12/03/2026 23:47

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.

I presume you know how it feels to have someone send you an anonymous note like that? Because I do. I have seen someone completely broken by it. She leant on me a lot at the time but spiralled for months. She was so focussed on it that it made the fallout worse. I wouldn’t wish that on my worst enemy.