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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

To ditch a friend for cheating on her OH?

152 replies

SeenHerSelina · 05/09/2025 16:24

Been best friends since each of our first kids were born 16 years ago, I thought I knew everything about her. Always thought her OH was a bit quiet, maybe even unsociable but that contradicts all the stories about him from my friend about how outgoing he was before kids came along, and maybe quite naturally kids changed all that. BY all accounts though he’s a nice bloke, good Dad and very attentive and romantic to his OH.

I’ve been out occasionally with my friend over the years, she attracts the attention of men but nothing unusual in that I guess.

Through a mutual friend I heard what I thought/hoped was an unthinkable rumour that she’d been unfaithful with someone it turns out we both know. When I put it to her thinking it was scandalous, she told it was true and the details even more gruesome than rumoured. She then went on to reveal that before they had kids she’d been cheating behind his back for years.

I’m totally shocked and struggling to see her the same way I did before. I can’t help but feel deceived, but I also feel completely stupid for judging her OH.

There is one occasion that I can’t get out of my head a few years ago when I left her walking back from a night out with a guy. A few weeks later her OH made passing reference about her coming home the following morning, assuming she’d stayed at mine. I haven’t asked her about it, I almost don’t want to know.

AIBU to just ditch her as a friend?

OP posts:
1offnamechange · 06/09/2025 14:10

Pissenlit · 05/09/2025 16:27

I don’t get why you would end a longtime friendship with someone you presumably love and value over an affair.

because it is causing her to consider whether she does love or value her friend?

her good opinion of her was based on what she knew of her friend at that time.

now she has additional information that has caused her to re-evaluate who the friend actually is.

cheaters are rarely nice people.

presumably you wouldn't consider it unreasonable to end a friendship if you found out a friend repeatedly and without other moral qualms did something else you considered morally reprehensible - was abusive towards her children, racist, compulsive liar, rude to service staff, shoplifted despite not having financial issues, etc?

wendywoopywoo222 · 06/09/2025 14:20

KimberleyClark · 06/09/2025 14:04

So if you knew one of your friends was cheating with the husband of another member of your group what would you do? Support both of them?

I’ve never considered that happening and hope it never would, Quite honestly don’t know.

otinata · 06/09/2025 14:22

I wouldn’t end a friendship over this

Pissenlit · 06/09/2025 15:27

1offnamechange · 06/09/2025 14:10

because it is causing her to consider whether she does love or value her friend?

her good opinion of her was based on what she knew of her friend at that time.

now she has additional information that has caused her to re-evaluate who the friend actually is.

cheaters are rarely nice people.

presumably you wouldn't consider it unreasonable to end a friendship if you found out a friend repeatedly and without other moral qualms did something else you considered morally reprehensible - was abusive towards her children, racist, compulsive liar, rude to service staff, shoplifted despite not having financial issues, etc?

I notice this tendency a lot on Mn — the othering and weird demonising of people having extramarital relationships. They are just like everyone else. They are deeply ordinary, doing something fairly widespread.

No, it’s not the ‘nicest’ thing to do by any means, obviously, but neither are many behaviours routinely described on here (without being demonised to anywhere near the same extent).

I would take DH having an affair over the kinds of boorish, misogynistic, emotionally-subnormal, exploitative behaviour routinely viewed as ‘normal’ in husbands/male partners on here.

I think a lot of Mners are superstitious about affairs and vitriolically condemn them on here in much the same way as they avoid walking under ladders or avoid smashing mirrors — for fear that their male partner will have sex with someone else. There’s no point. You can’t ward them off with garlic. They just happen, sometimes. And cause hurt and damage. But suggesting an affair is akin to genocide won’t magically keep your spouse faithful.

MoonlightFlit25 · 06/09/2025 15:39

thebabayaga2025 · 06/09/2025 10:20

Well of course, you must ditch her if you find her morally repugnant. You cannot be friends with people whose behaviour disgusts you. And the fact that she is a flagrant, unrepentant liar is deeply concerning - if she will lie to him she will certainly lie to and about you. You're not more special to her than her cuckolded husband.

Liars are dangerous. Unrepentant, well practised ones even more so. She's already used you as an excuse, it sounds like. Liars always drag normal people into their shit, one way or another. And if people know she's a betrayer and liar and you are good friends with her you risk been tarred by the same brush.

You have an absolute right to your own moral compass and anyone who shocks, revolts, disturbs you is not a person to be friends with.

And in case anyone tries the don't judge line - you absolutely must should and can judge, everyone judges, it's how we stay safe, anyone who gives you shit for judging is a) a liar as they use their judgement all the time just like everyone else and b) showing a red flag, only people doing shitty things and trying to conceal them trot out the "don't judge me line".

Dump her with a clear conscience and distance yourself from her seedy behaviour.

This is so clear and well thought out.

Absolutely agree with everything written here.

Globules · 06/09/2025 15:40

A good friend of mine is cheating on her OH of 25 years. He's a dullard and always has been. She is wonderful fun and the life and soul of any party. I never understood the attraction when they started dated, but we weren't close friends when they got together.

I've had a heart to heart with her about her several affairs.

Her childhood meant she chose a "safe" partner for life. The older he's got, the more boring he's got. He stopped having sex with her 15 years ago. Her Christian faith means that divorce is not an option for "he's just too dull and we don't have sex". (She has no answer for lining up her extra marital sex with her faith)

She knows I don't approve. She knows she's not going to change her life because of my disapproval. I'm sticking with her, as I love her and now understand why she's made those choices. She's now more at arms length than she used to be, as I can't bear the deceitful side to her.

Only you can make your decision about your life and your friend. You need to be at peace with where you land.

namechangetheworld · 06/09/2025 15:42

If she had been a good friend to me then no, of course I wouldn't break off a friendship.

Her marriage is absolutely none of your business.

Delatron · 06/09/2025 15:54

Pissenlit · 06/09/2025 15:27

I notice this tendency a lot on Mn — the othering and weird demonising of people having extramarital relationships. They are just like everyone else. They are deeply ordinary, doing something fairly widespread.

No, it’s not the ‘nicest’ thing to do by any means, obviously, but neither are many behaviours routinely described on here (without being demonised to anywhere near the same extent).

I would take DH having an affair over the kinds of boorish, misogynistic, emotionally-subnormal, exploitative behaviour routinely viewed as ‘normal’ in husbands/male partners on here.

I think a lot of Mners are superstitious about affairs and vitriolically condemn them on here in much the same way as they avoid walking under ladders or avoid smashing mirrors — for fear that their male partner will have sex with someone else. There’s no point. You can’t ward them off with garlic. They just happen, sometimes. And cause hurt and damage. But suggesting an affair is akin to genocide won’t magically keep your spouse faithful.

Exactly. It’s a bit more nuanced than all cheaters are horrific, despicable people. And it’s a pretty stupid thing to say.

Some estimates say 60% of people who are married have an affair. They can’t all be awful, horrific people..!

Delatron · 06/09/2025 15:56

Globules · 06/09/2025 15:40

A good friend of mine is cheating on her OH of 25 years. He's a dullard and always has been. She is wonderful fun and the life and soul of any party. I never understood the attraction when they started dated, but we weren't close friends when they got together.

I've had a heart to heart with her about her several affairs.

Her childhood meant she chose a "safe" partner for life. The older he's got, the more boring he's got. He stopped having sex with her 15 years ago. Her Christian faith means that divorce is not an option for "he's just too dull and we don't have sex". (She has no answer for lining up her extra marital sex with her faith)

She knows I don't approve. She knows she's not going to change her life because of my disapproval. I'm sticking with her, as I love her and now understand why she's made those choices. She's now more at arms length than she used to be, as I can't bear the deceitful side to her.

Only you can make your decision about your life and your friend. You need to be at peace with where you land.

Gosh I’d be very supportive of my friend in those circumstances rather than ‘disapproving’ - your poor friend.

hoohaal · 06/09/2025 15:59

I’m not sure what I think on this one.
Before I ready the post, my initial reaction was ‘why would you ditch your friend over that, it’s not like she cheated on you’.

But having read your post, it’s a bit like you never knew her. She kept such a huge part of her life hidden away from you. But then also I guess she wasn’t going to tell anyone.

Hmm, I don’t know.
Not helpful. Sorry.

Globules · 06/09/2025 16:09

Delatron · 06/09/2025 15:56

Gosh I’d be very supportive of my friend in those circumstances rather than ‘disapproving’ - your poor friend.

You can support a person through something whilst disapproving of their actions.

I'm happy for you that you've never had to experience doing so.

VimesandhisCardboardBoots · 06/09/2025 17:23

Helpel · 05/09/2025 18:14

Imagine a man dumping his best mate cause he was cheating on his wife. Wouldn’t happen. (Apart from the one person who will come on here to say her husband did just that of course!). Women are their own worst enemies sometimes. She’s your best mate- tell her what you think of her behaviour by all means, but don’t just dump her!

Does happen and I have done it. I prefer my friends to not be dickheads.

I've supported friends in leaving their partner's, but I won't support them in cheating on their partner.

If nothing else, socialising with a cheat would make me less trustworthy to DP, and fuck that for a laugh.

MorrisZapp · 06/09/2025 18:23

If she'd told you about the cheating then you would have been party to the deception going forward. She clearly didn't want you to be in that position.

MorrisZapp · 06/09/2025 18:27

And no, I wouldn't ditch a good friend for this. None of my friendship group would, we've talked about it. It's 100% no judgement, unless of course they shagged one of our husbands. And even then I'm open to hearing everyone out.

Delatron · 06/09/2025 18:34

I mean we used to joke about helping each other bury our husbands under the patio in Covid times when we were sick of them working from home.…

I wouldn’t judge an affair I’d just want to make sure my friend was ok and talk through what she was going through and what the best option would be going forward. Zero judgement and friends are everything. Not some random husband!

Tootietoots · 06/09/2025 18:49

I would probably ask her why? And was it worth risking hurting her husband and breaking up her family for ? but I’ve been friends with my oldest friends for over 40 years , we’ve been through thick and thin together , so no I wouldnt judge and end my friendship.

Mutability · 06/09/2025 18:52

I can’t imagine being that sanctimonious or judgemental with a close friend.

I don’t suppose it will be much of a loss to your ‘friend’, OP.

Delatron · 06/09/2025 19:12

I think you’d probably say ‘is this worth blowing up your life over?’ but zero judgement and it wouldn’t affect the friendship with a close friend.

MelBrookesMyHero · 06/09/2025 22:35

Globules · 06/09/2025 15:40

A good friend of mine is cheating on her OH of 25 years. He's a dullard and always has been. She is wonderful fun and the life and soul of any party. I never understood the attraction when they started dated, but we weren't close friends when they got together.

I've had a heart to heart with her about her several affairs.

Her childhood meant she chose a "safe" partner for life. The older he's got, the more boring he's got. He stopped having sex with her 15 years ago. Her Christian faith means that divorce is not an option for "he's just too dull and we don't have sex". (She has no answer for lining up her extra marital sex with her faith)

She knows I don't approve. She knows she's not going to change her life because of my disapproval. I'm sticking with her, as I love her and now understand why she's made those choices. She's now more at arms length than she used to be, as I can't bear the deceitful side to her.

Only you can make your decision about your life and your friend. You need to be at peace with where you land.

"Her Christian faith means that divorce is not an option..."

Does her Christian faith promote infidelity/adultery as an alternative then?

SpiralSpiritSocks · 06/09/2025 23:10

Pissenlit · 06/09/2025 15:27

I notice this tendency a lot on Mn — the othering and weird demonising of people having extramarital relationships. They are just like everyone else. They are deeply ordinary, doing something fairly widespread.

No, it’s not the ‘nicest’ thing to do by any means, obviously, but neither are many behaviours routinely described on here (without being demonised to anywhere near the same extent).

I would take DH having an affair over the kinds of boorish, misogynistic, emotionally-subnormal, exploitative behaviour routinely viewed as ‘normal’ in husbands/male partners on here.

I think a lot of Mners are superstitious about affairs and vitriolically condemn them on here in much the same way as they avoid walking under ladders or avoid smashing mirrors — for fear that their male partner will have sex with someone else. There’s no point. You can’t ward them off with garlic. They just happen, sometimes. And cause hurt and damage. But suggesting an affair is akin to genocide won’t magically keep your spouse faithful.

What an odd and hyperbolic post.

Having an affair isn’t akin to genocide and unless I missed it I haven’t seen a post suggesting anything of the kind.

As for vitriol I haven’t seen much of that either. People who have extramarital affairs are dishonest and deceitful- that’s just a statement of fact.

I do agree that infidelity is ordinary though. Entirely predictable and boringly cliched.

Ordinary and common doesn't make it acceptable though.

Affairs wrecks people’s lives. I’m not going to support a friend who chooses to hurt people.

It’s not superstition, I’m just choosey about who I spend my time with.

SpiralSpiritSocks · 06/09/2025 23:14

Globules · 06/09/2025 15:40

A good friend of mine is cheating on her OH of 25 years. He's a dullard and always has been. She is wonderful fun and the life and soul of any party. I never understood the attraction when they started dated, but we weren't close friends when they got together.

I've had a heart to heart with her about her several affairs.

Her childhood meant she chose a "safe" partner for life. The older he's got, the more boring he's got. He stopped having sex with her 15 years ago. Her Christian faith means that divorce is not an option for "he's just too dull and we don't have sex". (She has no answer for lining up her extra marital sex with her faith)

She knows I don't approve. She knows she's not going to change her life because of my disapproval. I'm sticking with her, as I love her and now understand why she's made those choices. She's now more at arms length than she used to be, as I can't bear the deceitful side to her.

Only you can make your decision about your life and your friend. You need to be at peace with where you land.

I’d be dumping her for the staggering hypocrisy let alone anything else.

I find using her alleged Christian faith to have her cake and eat it pretty disgusting.

I’d just lose all respect.

TrishM80 · 06/09/2025 23:27

Your "friend" is making you part of the deceit and using you as cover for her sexual dalliances behind her husband's back.

You should have told the husband that time, "no, she didn't stay with me that night", and see how she'd try to squirm out of it.

KimberleyClark · 07/09/2025 00:28

ThreePointOneFourOneFiveNine · 05/09/2025 17:33

I’d drop her for the cheating alone, but how dare she use you as a cover story?! I’d be livid. I’m baffled at all the people saying they wouldn’t have a problem with a friend who did this. Do so many people think infidelity is okay?

It seems they do as long as they are not the ones being cheated on.

KimberleyClark · 07/09/2025 00:32

Delatron · 06/09/2025 18:34

I mean we used to joke about helping each other bury our husbands under the patio in Covid times when we were sick of them working from home.…

I wouldn’t judge an affair I’d just want to make sure my friend was ok and talk through what she was going through and what the best option would be going forward. Zero judgement and friends are everything. Not some random husband!

But you’d sure as hell judge your friend’s husband for having an affair?

thebabayaga2025 · 07/09/2025 01:22

thebabayaga2025 · 06/09/2025 10:20

Well of course, you must ditch her if you find her morally repugnant. You cannot be friends with people whose behaviour disgusts you. And the fact that she is a flagrant, unrepentant liar is deeply concerning - if she will lie to him she will certainly lie to and about you. You're not more special to her than her cuckolded husband.

Liars are dangerous. Unrepentant, well practised ones even more so. She's already used you as an excuse, it sounds like. Liars always drag normal people into their shit, one way or another. And if people know she's a betrayer and liar and you are good friends with her you risk been tarred by the same brush.

You have an absolute right to your own moral compass and anyone who shocks, revolts, disturbs you is not a person to be friends with.

And in case anyone tries the don't judge line - you absolutely must should and can judge, everyone judges, it's how we stay safe, anyone who gives you shit for judging is a) a liar as they use their judgement all the time just like everyone else and b) showing a red flag, only people doing shitty things and trying to conceal them trot out the "don't judge me line".

Dump her with a clear conscience and distance yourself from her seedy behaviour.

Don't forget, she is abusing her husband. Cheating is always abuse. Are you comfortable being friends with someone who is doing the mental equivalent of slapping her husband in the face repeatedly? Cheating destroys trust, makes people question themselves, the one person in you life you should be able to trust and turn to is the one who took vows to stay faithful and love you and care for you. It is headfuckery beyond belief.

Cheaters are abusing their partners and they are abject liars. The only people who ever try to deny this are cheaters and their doormat partners - who are practicing self deception to try to tolerate the intolerable.

If you are uncomfortable being around a lying abuser, I don't blame you.