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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:
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

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.

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.

ilovesooty · 13/03/2026 00:43

Berrylipshade · 12/03/2026 20:36

I don’t know her, no.

So don't get involved.

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.

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

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!

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.

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.

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

Plasticdreams · 13/03/2026 02:36

Do it anonymously. I would definitely tell her.

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

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 💐

Inmyuggs · 13/03/2026 04:29

This reply has been deleted

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

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.

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

DeepRubySwan · 13/03/2026 05:54

I would personally 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 05:57

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.

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.

mjf981 · 13/03/2026 06:30

I'd have to tell his partner. I'm a wimp so I'd do it anonymously but I'd name and shame both of them including her name to the wife. And I'd also add that everyone at his workplace knows about it and is disgusted.

What she then does with this info is up to her.

Iocanepowder · 13/03/2026 06:38

I would find a way to tell the wife op. She may at risk of STIs and won’t know about it.

Also it gives her a chance to get her ducks in a row before he finds out she knows.

notatinydancer · 13/03/2026 06:45

Definitely tell the wife. He will wriggle out of it but at least she’ll be looking for things, and he will know people know.

Berrylipshade · 13/03/2026 06:48

I’ve woken up and read all the comments.
I actually now feel telling her isn’t right. But telling my own manager might be a way of putting it on someone else to do something about it, even if it’s just a way of saying : we ALL know- stop the touching.
I will dread this conversation, but it’s the right thing.
I know they will blow his life up themselves at some point. Also my friend did say, maybe they aren’t actually in the affair, this is just them “wanting” to be - how do I know for sure?? That’s a fair point.

OP posts:
canisquaeso · 13/03/2026 06:52

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.

Plus I’m sure these two users are more than happy to enjoy the rights that other women fought for.

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