1543 – My fiancée threatened to break up with me if I told her best friend’s husband that his wife is cheating on him

Featured on @StorylineReddit: November 12, 2025

He stops for breakfast. A bakery counter, a wrapped sandwich, traffic moving past. Across the street, he notices his fiancée’s best friend standing close to a man who is not her husband. They speak. They lean in. They kiss. He takes out his phone and captures it.

The real conflict begins later, in the kitchen, when he shows the photo and waits for her reaction. He expects outrage, or at least surprise. Instead, she tells him to delete it. Ignore it. Let it go.

This is where the story turns inward. Not toward the cheating itself, but toward a split that had apparently never been tested. A long engagement. Wedding plans delayed. Shared history stretching back to their mid-teens. And suddenly an ultimatum: if he tells the husband, their relationship is over.

Some fractures announce themselves loudly. Others surface in moments that look almost ordinary.


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An external betrayal forces a private reckoning. After witnessing his fiancée’s best friend kissing another man, he feels compelled to inform the husband someone he considers more than a casual acquaintance. His fiancée insists he stay out of it, arguing that disclosure would damage her closest friendship.

The disagreement shifts quickly from the friend’s conduct to the couple’s own alignment. He frames his position as basic decency toward someone who deserves to know. She frames hers as necessary loyalty. The conversation tightens. A breakup threat enters the room. He pushes back. She reiterates the stakes.

He eventually tells the husband directly. Divorce proceedings begin. The friend leaves the marital home. In the aftermath, the engagement collapses not because of the affair itself, but because of how each partner responded to it. What began as someone else’s secrecy becomes a stress test neither of them passes in the same way.

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My fiancée threatened to break up with me if I told her best friend’s husband that his wife is cheating on him
CONCLUDED
I am not The OOP, OOP is u/throwRAy875678_

My fiancée threatened to break up with me if I told her best friend’s husband that his wife is cheating on him.

Originally posted to r/relationship_advice

TRIGGER WARNING: Infidelity

Original Post – rareddit Nov 10, 2021

I (m27) have been together with my fiancé (f28) for 12 years, out of which 3 years we have been engaged. I love her a lot and everything between us has been great. We do encounter problems now and then, but every long-term couple does tbf. The problem we are having right now is not so much to do with us directly but to do with my fiancé’s best friend (I’ll call her Beth in this post).

Yesterday while going to work my I stopped at a bakery and to get some breakfast. Right across the street, I saw Beth with a guy. First, they were just talking and I didn’t think much of it and honestly, I was busy getting my sandwich. I turned around and they were kissing. I got my phone and took a photo (Not the most ethical thing to do but I thought the husband might need it).

I got home told my fiancé about it and also shared the photo with her. She told me to delete the photo and just ignore it. I wasn’t comfortable with this and told her that instead, I would tell her best friend’s husband because if it was me in his position, I’d like to know too. Her concern with this was that it would really damage her friendship with Beth and that’s why I should stay out of it. I disagreed and she told me that if Beth’s husband found this out from me I should consider our relationship over.

Later that day my fiancé apologized to me that she didn’t mean the breaking up part, but I really shouldn’t do this even though that would be the right thing to do. I was still a little pissed that she would just throw away a 12 year old relationship just to hide someone else’s cheating so I told her that I would tell the husband everything and if she wants to break up over this, I’m fine with that. Definitely did not mean the “I’m fine with that” part but I probably just said it out of pettiness/spite.

I haven’t told the husband yet but all this has me questioning my fiancé’s moral values and how she thinks infidelity is okay. Kinda fucked up. It’s 8 AM right now where I live and I haven’t slept all night thinking about my relationship. She did kinda double down on the breaking up part at the end if I proceeded on telling Beth’s husband so I’m very conflicted right now. How do you guys see this situation? Should I tell him knowing that it might end my relationship?

TLDR: What the title says. ​ Edit:

Just to clear my stance. The husband will find out about this, may it be anonymously or directly from me or Beth. I completely understand that other people’s relationship is not my business and I should keep out of it but there is one more relationship here, me and Beth’s husband. We might not be close friends, but we are friends nonetheless, so I owe him this much. My fiancé’s moral compass is fucked up and we need to talk about it and we will, because this marriage won’t work out otherwise. If this ends my relationship, then it really wasn’t as strong as I thought it was and that sucks.

I have the photo saved in a safe place and Beth’s face is clear in it so I doubt the husband will have trouble believing that his wife is cheating.

I plan on taking to Beth too and telling her to come clean and do it the right way because her secret is getting out one way or another. Definitely not having double dates with her anymore.

RELEVANT COMMENTS

Emily92774

She clearly knew her friend is cheating. If my BF came home and told me my friend is cheating on her husband, I would probably spend hours talking/dishing about it, with him. I wouldn’t just tell him “ignore it”.

Her reaction is weird on so many levels.

She knew. Now the question is does she value her friend being a cheater more than your relationship, or does the friend have something on her.

Also, I don’t mean to pry but why are you engaged for so long? Like, is the wedding on the horizon?

OOP

Her reaction was definitely weird as heck. Today I’ll talk to her more about this and see where we both stand on the matter.

“Also, I don’t mean to pry but why are you engaged for so long? Like, is the wedding on the horizon?”

It’s okay. We did intend to get married two years ago but then covid came around which forced us to postpone our plans. Both our families live abroad and both those countries were on the red list, so we decided to postpone until we can fly them here.

Update – rareddit Dec 30, 2021 (Almost 2 months later)

I told the husband. At first, I thought of doing it anonymously but then I just went ahead and told him over the phone. He has filed for divorce and his wife left. The last time I talked to him, he said that Beth won’t fight over the house (Their joint property) and had decided to leave. He told me that even if she comes after the house his lawyer is confident she won’t get it because of the infidelity laws where I live. This all happened weeks ago and he is doing better now.

As for my fiance, she wasn’t happy about this. I dumped her 2 days ago because she was giving me a lot of shit about how I broke her friends home. I didn’t do that, she did that to herself. We are currently talking about our living arrangements and It’ll most likely be her who moves out.

Happy holidays everyone. I hope your 2022 is as good as you are. 🎊🥳🎉.

RELEVANT COMMENTS

marcram0905

Good for you dude. You did the right thing. Must have been a difficult conversation with both the husband and your fiancee.

OOP

It was. It was evident by his voice that he was on the verge of crying. I wish him good luck because he deserves better.

~

RockYouLikeAMaster

she was trying to covering up and maintain a friendship with a cheater.

she put a cheater above her own relationship of +10 years.

if she advocates that kind of conduct, then she could do the same in the future. huge red flag,so you definitely dodged a bullet.

OOP

On the bright side this decade long relationship has taught me what not to do in my life in the future so that’s a plus.

~

CJFunnyMan

Take your ring and run! Thou hath dodged thee bullet. And then tell the betrayed.

OOP

She left the ring at her parents house apparently. I should get it back though since it not hers anymore.

~

Observerwwtdd

Where do you live that infidelity can influence the division of marital property??

OOP

I live in Europe but I think the husband meant a infidelity clause in a prenup (probably) because to the best of my knowledge infidelity doesn’t have anything to do with property. I’m not a lawyer so don’t take my word for it.

Source

At first, it’s almost procedural. He sees something. He documents it. He brings it home.

She looks at the photo. She asks him to delete it. He refuses. She says he should stay out of it. He says he would want to know if it were him. The exchange is direct, clipped, repetitive in places. No raised philosophical language. Just position and counterposition.

Then the escalation lands plainly: if he tells, it’s over. There isn’t a long buildup. The sentence arrives intact.

What sits at the center is not simply the affair but the question of alignment. He interprets silence as complicity. She interprets exposure as betrayal of a friend. The two frameworks do not overlap. They don’t try very hard to.

Midway through the conflict, something else becomes visible. A 12-year relationship is suddenly placed alongside a friendship and compared, even if no one uses that word. He hears the ultimatum as a willingness to sacrifice them. She likely hears his insistence as a willingness to disregard her world. Neither articulation is fully spoken.

He calls the husband anyway. On the phone, the man’s voice is strained, close to breaking. Divorce papers follow. Property discussions begin. The practical sequence unfolds quickly, almost efficiently.

Back home, the tone shifts from argument to distance. She tells him he broke her friend’s home. He disagrees. The ring is left at her parents’ house. Arrangements are discussed.

The story closes with movement someone packing, someone retrieving what is no longer theirs. The larger question of what this revealed, rather than caused, remains sitting there, unanswered.


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