My friend cheated on his partner and now my mom wants to report me to the police for telling him?

An autistic person witnessed their friend Kevin making out with another guy while in a long-term relationship with Josh. They gave Kevin an ultimatum: confess or they would. Years later, discovering the couple was about to marry without Josh ever knowing, the person decided to spill the truth—sparking massive fallout.

Family members, including a sister who knew all along and a mom with her own cheating history, exploded in rage. They smeared the person as crazy, demanded a fake retraction, and even threatened police action for “defamation.” It’s a wild clash of honesty versus a family culture of sweeping infidelity under the rug.

‘My friend cheated on his partner and now my mom wants to report me to the police for telling him?’

The drama traces back years when two friends, Kevin and Josh, were together, and the person saw Kevin cheat firsthand:

Two of my friends, let’s call them Kevin and Josh, had been together for years. A while ago Kevin cheated on Josh while making out with another man and I...

I confronted Kevin and told him either he tells Josh or I will. He got angry at me for “knowing this” and I said I was there, how could I...

They confronted Kevin immediately:

After days of pushing him he said he would talk to Josh. I stopped hanging out with them for a long time because I could not trust someone who cheats...

During that time I did some healing and with the help of my therapist started to understand how they had treated me the whole time. I talked to them a...

Fast forward two years. I found out they were getting married and even invited me, which already felt strange. I talked to my sister, who also knew about the cheating,...

She said it was too late and that we should stay out of it, saying she wanted to stay friends with Kevin and that if I told Josh, she wouldn’t...

I told her that if he treated his partner that way, why would you even want to be friends with him, and that if he lied to Josh and never...

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The person messaged Kevin declining the invite, leading to a revealing exchange:

I messaged Kevin and said I would not be going to the wedding. We ended up talking and I told him I did not believe he had said anything because...

That made me question the whole situation. Kevin said “Maybe your truth isn’t the only truth. He don’t need to know so maybe you should let it go too ”...

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At that point I realized he never told Josh and he had lied to me for years. He had also told me back then not to bring up the cheating...

So I told Josh the truth the same day. I told him Kevin cheated and that my sister and I were there and that Kevin had told me he talked...

Josh blocked me immediately. Then my sister blocked me, and Kevin blocked me too. I had never been blocked by anyone before, so having all this happen at once was...

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The sister spread lies:

My sister went around telling everyone we knew that my psychologist, boyfriend, and friends had made me crazy and that I had lied to prevent them from getting married.

This is something I’m unfortunately used to, since she always makes me take the blame alone and then tells everyone I’m the crazy one. The next day my mom called...

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She told me I ruined their lives and that I needed to call Kevin and Josh and say I made everything up because I was bored. She even threatened to...

Family context added layers:

For context my mom has cheated before and years ago I told my dad about it. My sister didn’t want me to tell him then either. She also once stayed...

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My family has always told me not to tell the truth in situations like this because it “creates problems” and that I should just stay quiet. We always end up...

I am also autistic and growing up my parents and sister constantly told me not to tell the truth because I “ruin things.” My parents always prioritized my siblings and...

I do not want to ruin anything. I actually asked my friends, my psychologist and my boyfriend what to do before I told Josh, and every single one said he...

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As an autistic person, it is very hard for me to lie, and I genuinely thought telling the truth was the right thing to do, though I can understand that...

Speaking up about infidelity, especially before a major commitment like marriage, aligns with strong ethical principles—transparency builds trust, while secrets erode it. The person’s decision prioritized Josh’s right to informed consent in his relationship, a cornerstone of healthy partnerships.

Family reactions reveal deeper dysfunction: a pattern of enabling cheating and punishing truth-tellers. This “code of silence” often stems from personal guilt or fear of confrontation, as seen in the mom’s past infidelity and defensive threats.

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Threats of police for defamation are empty—truth is an absolute defense in most jurisdictions, and minor interpersonal disputes rarely qualify as criminal. According to legal experts like those from the Electronic Frontier Foundation, civil defamation requires provable falsehoods causing harm, not honest disclosures.

For autistic individuals, literal honesty can clash with neurotypical social norms favoring white lies, leading to misunderstandings. Therapists specializing in neurodiversity, such as those referenced in Autism Speaks resources, emphasize validating direct communication while teaching navigation tools. Here, the person’s actions show growth from therapy, refusing to enable harm.

Here’s what Redditors had to say:

Everyone online sided firmly with the person, calling them NTA and highlighting how the family’s over-the-top reaction screams guilt and toxicity:

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A big chunk of comments laughed off the police threat, pointing out it’s legally baseless and advising to ignore or cut contact:

Fatty_Bombur - You did absolutely nothing wrong. Your sister and mother on the other hand are moral vacuums. NTA

waywardjynx - NTA The police don't care about defamation. Cut your family off, you'll be better for it.

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mochi7227 - She can call the police. They’ll ignore her. This is not a criminal case. It’s a civil case. She’ll have to sue you. Then she’ll lose the case....

Starry-Dust4444 - Defamation isn’t a criminal offense. It’s a civil matter. Your mom is not only hysterical, but she’s also an i__ot.

GellyG42 - NTA The police don’t give a s__t about your family drama, let her waste their time.

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Swimming_Acadia6957 - Hold up, your Mum is gonna tell the police you did what exactly, defamation? Dude your Mum might actually be an eejit

Individual-Foxlike - NTA. The police will laugh their asses off if she tries to report you for defamation. Ignore her. Some people prefer "pretty lies" rather than facing the truth....

Yrhndsaroundmythroat - NTA they literally cannot call the police on you for that. They would be laughed out of the station.

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Your mom & sister are extremely abusive toward you (doesn’t sound like your dad’s great either with him also consistently telling you that you “ruin things” by telling the truth...

also neglecting you for your other siblings & so is Kevin. Also, obv your mom & sister are furious that you exposed Kevin for cheating since they don’t like remembering...

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& your mom seems to be recreating her reaction to finding out you told your dad about her own infidelity considering how mental she got on that phone call. I...

You ruined nothing. In fact, you saved your friend from a life of hell & misery. You should be proud of yourself. It speaks volumes that someone like your sister...

Glittering-Fan1616 - NTA. The police don't care about defamation. If she really calls them, they'll just laugh at her face! Also, good job for you for being honest about this...

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PuddinTamename - You're not the AH. You sound like a kind and moral person. I hope you find new friends that share those values. Your Mom's threats to call the...

Others spotted the family’s pattern of protecting cheaters, likely tied to their own histories:

AlisaWaelchi - NTA. The context about your family always covering up cheating makes their reaction makes so much sense. They aren't mad you ruined a wedding, they're mad you broke...

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Much_Leather_5923 - F__k Kevin. F__k Josh, F__k your sister & F__k your mother. They would also make jokes about me being stupid and too dumb for college. Just f__k em...

BothTreacle7534 - nta defamation is, if you do tell something negative about someone, that is not true or very twisted (e. g. implying something bad/worse)

people who support cheaters / are cheaters are very often also not trustworthy, that includes feeling entitled to other people’s belongings / success / effort…

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Your sister can wear the dress to another wedding / anniversary / celebration of her success (in case she does something like earning a certification or…) / engagement / …....

A few encouraged going no-contact and praised the person’s strong morals:

Kaezzi - How old are you? In your thirties like your friends? I think you need to step away from your family. They are abusing you and most probably causing...

When I was in my mid thirties I went NC with both my family and my in-laws. It did me a world of good to not constantly be criticized and...

Curse_of_RatBrick - Telling someone doesn't ruin things, the person doing the cheating ruined things. Now they're mad the gig is up. That's on them

The person acted with courage and ethics, giving Josh vital information before a lifelong commitment hardly something to apologize for. The explosive family response exposes long-standing issues around truth and accountability, but their threats hold no weight. Would you have stayed silent to keep the peace, or spoken up like this? How do you handle family patterns of covering mistakes—share your experiences below!

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