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Mumsnet has not checked the qualifications of anyone posting here. If you need help urgently or expert advice, please see our domestic violence webguide and/or relationships webguide. Many Mumsnetters experiencing domestic abuse have found this thread helpful: Listen up, everybody

Fling partner cheated on wife, now back on date app

93 replies

sofiaparker · 11/03/2025 00:07

Last year had a fling with this guy. Only recently found out online that he is married with a kid. So he had cheated with me, and on his wife without both of our knowledge. I coincidentally swiped on him again on the dating app which I'm using as a single woman. So he is back to his cheating game seems. And this time he has put looking for 'a life partner' and a 'long term relationship'. I have his wife's insta ID. Matched with him again. This time would like to gather some evidence. Any ideas would be appreciated. Initial thought was to leave it but I have decided against this as this will only lead to him playing emotionally with other women and continually cheating on his wife without her even knowing. Side note- he performs and receives unprotected oral. Although I'm not in any trusting or committed relation right now, but if that happened to me without me even knowing then I'd be super pissed. Side note number 2, the first time he cheated with me, his wife was pregnant.

OP posts:
MuckFusk · 11/03/2025 21:17

madamweb · 11/03/2025 21:06

Agreed.

Cheating and exposing your unwitting spouse to STDs should be up there as unpleasant DV just like assault. We shouldn't be turning a blind eye to it.

Totally agree. It should be prosecuted as DV if the spouse gets an STD from the cheater.

Nodlikeyouwerelistening · 11/03/2025 21:31

MuckFusk · 11/03/2025 21:16

She knows he is trying to cheat with others at the very least. She does not know if he has been successful thus far, which matters not a whit in terms of protecting the wife.

Please don't use the old "it's not black and white" line, beloved by people who are trying to justify selfish, unethical choices. Ultimately, that's what not telling comes down to. It's not about concern for the wife (which is just a rationalization) it's about not putting yourself in an unpleasant situation, which is an entirely selfish motive.

Telling does not prevent OP from moving on with her life either. She does not have to engage any further after providing the info which allows the wife to make an informed choice, which is the only way it is a free choice. You seem to have a different set of ethical rules for yourself in this kind of situation, which is none of my concern or the OP's concern. It's your life and you get to live it by your own rules. OP has indicated she thinks telling is the right thing to do. As you say, that is her decision to make and she doesn't need to get a guilt trip about her decision.

What he does TRY to do or not do is literally nothing to do with the OP. She only knows the sexual experience she has had with him and can’t comment on anything else.
She wants to tell the wife, fine that’s her decision, but posting on a forum invites looking at different perspectives, including the harm she could be unleashing.
Also, do not make out telling her is some kind of noble unselfish gesture, it’s not. OP has been wronged and she is asking for ways to get “evidence” i.e. entrap him to do him maximum harm. That’s just vengeance and wife and children are collateral. Please also note she says she only found out recently that he was married but it then also took seeing him on dating sites to then make her do anything about it.

OneFineDay13 · 11/03/2025 21:49

MsDogLady · 11/03/2025 02:35

Please inform her with evidence, @sofiaparker. This morally bankrupt cheat is stealing her agency, choices, and sexual consent. He is risking her health and has risked his baby’s health.

Bring her out of the dark and give her the opportunity to make informed decisions about her own life.

I agree with Doglady

OneFineDay13 · 11/03/2025 21:50

Vegandiva · 11/03/2025 03:05

there was a guy i used to see on the dating apps in my area, and a woman made a new profile with his photos, but also some photos she found of him with his wife and child to tell people on the app what he was up to at least. you could do that for the app side of it 🙂

This is genius!

Vegandiva · 11/03/2025 22:33

OneFineDay13 · 11/03/2025 21:50

This is genius!

yeah, the guy must have been wondering why he wasn’t able to harvest as many victims from the apps all of a sudden 😁

MuckFusk · 11/03/2025 22:49

Nodlikeyouwerelistening · 11/03/2025 21:31

What he does TRY to do or not do is literally nothing to do with the OP. She only knows the sexual experience she has had with him and can’t comment on anything else.
She wants to tell the wife, fine that’s her decision, but posting on a forum invites looking at different perspectives, including the harm she could be unleashing.
Also, do not make out telling her is some kind of noble unselfish gesture, it’s not. OP has been wronged and she is asking for ways to get “evidence” i.e. entrap him to do him maximum harm. That’s just vengeance and wife and children are collateral. Please also note she says she only found out recently that he was married but it then also took seeing him on dating sites to then make her do anything about it.

You are assigning a revenge motive to the OP without sufficient evidence. That's unfair to her and not a valid argument for your position. It does not matter what OP's motives are if the result is that the wife is warned of a threat against her.

I do not propose OP should comment on what the cheater might be doing. That's for the wife to figure out. All OP needs to do is give her the necessary information to enable her to do the math herself.

Nodlikeyouwerelistening · 11/03/2025 23:05

MuckFusk · 11/03/2025 22:49

You are assigning a revenge motive to the OP without sufficient evidence. That's unfair to her and not a valid argument for your position. It does not matter what OP's motives are if the result is that the wife is warned of a threat against her.

I do not propose OP should comment on what the cheater might be doing. That's for the wife to figure out. All OP needs to do is give her the necessary information to enable her to do the math herself.

So just tell her the part about having sex with him then and stop with all the “evidence” gathering, surely? I’m not assigning any motive, I just read the post. She knows nothing but that she had sex with him and maybe all these months later she wants to tell him, fine, so just tell him but be prepared for unexpected consequences.

Nugg · 11/03/2025 23:25

Walk away. Leave him to his pathetic games.

sofiaparker · 12/03/2025 00:57

Update:

  1. thanks to all who have been looking at the issue logically and for your support and standing up for me.

  2. if I'm honest it takes guts to tell the wife. I'm still questioning if I'm ready to invite this drama into my life. Cheater knows no info on me but I'm still scared in case he does.

  3. to those saying the trap is pathetic. The wife would have no reason to believe me without the evidence. I have successfully talked to him and gathered the evidence on chats now.

  4. I know way more info on him and his whole extended family now. Since a lot of them including him and wife have public online presence. He knows nothing but my name. Or so I think. But still I have no idea what this man is capable of. So I'm genuinely scared. What if I was the only one he cheated with? He will know I outed him. I'm trying my best to build the guts to tell his wife info that could potentially protect her. This guy remembers me well although it's been a whole year. Maybe he didn't have much luck on the dating app, or maybe he did. No one knows

  5. I've put myself through STI testing in case. And looking to focus on longer term and trusting relationships but it isn't easy especially when you come across people with fake intentions like these. I would not have invested my energy in this person honestly if I had known it would end up being not more than a fling.

  6. ultimately. I must tell the truth. And y'all need to stop assuming all women are frail and vulnerable. She needs to know. She can decide what's best for her.

OP posts:
MuckFusk · 12/03/2025 02:34

@Nodlikeyouwerelistening we could go on like this for days and get absolutely nowhere. The bottom line is OP feels she has a duty to warn. I agree with her. You don't. Ethics are very personal and it appears that in this case they run deep, so none of us will budge on this matter. So let's leave it at that, shall we?

doodahdayy · 12/03/2025 02:43

Just move on with your life

ThisIsMyYearToFindMyself · 12/03/2025 05:16

For all those saying ‘it’s not your business’ etc etc etc, how would you feel if this happened to you? People knew, said nothing, and you risked your health, happiness, and your best years with a man like this? Would you genuinely be happy not knowing? For how many years? Until your kids were in primary school? Until the GCSE years? Until you were 58? Until you attend that awkward GP appointment?

And for those who told and lost a friend, you did the right thing. You did the very best you could for a person you cared about.

I’m always stunned at the pushback on these kind of threads.

Nicecuppatea2025 · 12/03/2025 05:30

I really couldn’t get worked up about this. I could not be arsed with it. Just leave it and move on with your life.

LouiseMadetheBestBroccoliPasta · 12/03/2025 05:57

madamweb · 11/03/2025 21:06

Agreed.

Cheating and exposing your unwitting spouse to STDs should be up there as unpleasant DV just like assault. We shouldn't be turning a blind eye to it.

Agree. And cheating IS domestic abuse. In fact it is every type of domestic abuse you can think of. It is:

  • emotional abuse: cheated people class being cheated on the most painful and traumatizing thing that ever happened to them, it's agonizing and soul destroying
  • mental abuse: many women feel a latent sense of unease long before they find out their spouse is cheating, they clock the lies subconsciously, they query the cheater and are fed a pack of lies and are gaslit to kingdom come, and they feel anxious and confused, sometimes for years
  • physical abuse: the cheater can not only pass on deadly STDs, they also pass on vaginal flora from OWs that can cause distressing chronic or repeated bouts of UTIs and bacterial vaginoses; many women say how these problems disappeared when they ditched the cheater
  • financial abuse: lot of cheaters spend family money on OWs and prostitutes
  • sexual abuse: the wife would likely NOT agree to sex with the cheater if they knew he was fucking around, so the right to consent has been stripped from her
  • a form of reproductive abuse, because chlamydia and bacterial vaginosis can cause female sterility

And it is child abuse, because this cheater could pass on disease to his wife that could threaten the baby's health and even life.

The argument NOT to tell the wife are morally bankrupt and self-serving, and deeply patronizing to the wife. You cheat the wife as much as the cheater by withholding information that could help her change course in her marriage and spare herself from ongoing abuse.

winter8090 · 12/03/2025 06:03

Stay in your lane and focus on your own life (and ensuring you avoid scumbags like this one).

BlondiePortz · 12/03/2025 06:06

Wouldn't it better to put your energy into making healthy choices in the future, not what women see in him but I presume he will move on the next one

justanotherboymum · 12/03/2025 06:25

As someone who had my husband cheat on me for years and I didn't know, please take screenshots and send to her. You can do it anonymously if you want but give the information to her and then it's up to her. I wish someone had done that for me

VanillaVein · 12/03/2025 06:40

Tell her, OP. She really does have a right to know, especially as her health is being put into jeopardy. Also, you won't really be inviting drama into your life - screenshot and send her all relevant info and then mute or block her if you want, as long as she's told. What happens next is then up to her with informed choice.

SirRaymondClench · 12/03/2025 06:40

My best friend son was stillborn after her H gave her an std. It was horrendous and she lost the son she so desperately wanted because of that vile cheating cunt.
Those on here advocating for saying nothing are just enabling this man to cheat on his wife.
Tell the wife she deserves to know.

VanillaVein · 12/03/2025 06:41

Aside, I do find it funny how some on MN go out of their way to justify adultery. It almost smells like projection.

serene8 · 12/03/2025 06:50

I was in a similar situation. I found out he was engaged and told his fiancée. They still got married but at the very least she was able walk into her marriage knowing exactly who she was dealing with.

I would tell. Being able to make an informed choice is important. He is lying and deceiving all those around him. The wife deserves to know and whatever she does with that information is up to her

renomeno · 12/03/2025 07:26

Curious to know how many people would tell the husband if it was the wife cheating on him?

Quitelikeit · 12/03/2025 08:05

It’s the fact that he is highly deceptive by not telling unsuspecting women that he is married

Many women would be absolutely horrified that they had been deceived into sex/meeting up with a married man

That shows he’s a very low character

madamweb · 12/03/2025 08:15

LouiseMadetheBestBroccoliPasta · 12/03/2025 05:57

Agree. And cheating IS domestic abuse. In fact it is every type of domestic abuse you can think of. It is:

  • emotional abuse: cheated people class being cheated on the most painful and traumatizing thing that ever happened to them, it's agonizing and soul destroying
  • mental abuse: many women feel a latent sense of unease long before they find out their spouse is cheating, they clock the lies subconsciously, they query the cheater and are fed a pack of lies and are gaslit to kingdom come, and they feel anxious and confused, sometimes for years
  • physical abuse: the cheater can not only pass on deadly STDs, they also pass on vaginal flora from OWs that can cause distressing chronic or repeated bouts of UTIs and bacterial vaginoses; many women say how these problems disappeared when they ditched the cheater
  • financial abuse: lot of cheaters spend family money on OWs and prostitutes
  • sexual abuse: the wife would likely NOT agree to sex with the cheater if they knew he was fucking around, so the right to consent has been stripped from her
  • a form of reproductive abuse, because chlamydia and bacterial vaginosis can cause female sterility

And it is child abuse, because this cheater could pass on disease to his wife that could threaten the baby's health and even life.

The argument NOT to tell the wife are morally bankrupt and self-serving, and deeply patronizing to the wife. You cheat the wife as much as the cheater by withholding information that could help her change course in her marriage and spare herself from ongoing abuse.

Thank you. You expressed it much more clearly than me! Yes to everything you have said.
It's mind boggling how many women tie themselves in knots to find excuses not to tell someone they are being cheated on.

GoldBeautifulHeart · 12/03/2025 08:19

I would always want to know especially if proof was provided.

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