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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

Partner of 16 years cheated!!

12 replies

GeriatricMum3 · 08/09/2025 10:59

I have been with my bf for 16 years. We have 2 children together (10y and 5 weeks) and he raised my daughter (19) from the age of 2.

A week ago I found messages on his phone to another woman he works with saying stuff like he loves her and he hopes he’s enough for her. Plus other stuff but I honestly got so worked up I can’t think of it. She is saying it all back to him. She is in a gay relationship.

On the day I found them he admitted everything said they had kissed and cuddled a couple of times but not slept together. He said it started a year ago.
Now he’s saying she has manipulated him and made him feel trapped because she made out she would make his life hell at work. He told me he said all of that to her to keep her sweet.
He’s saying I’m being unreasonable by splitting up as we have been together 16 years and surely that’s worth fighting for. But to me 16 years should have been enough to not do that. I have said that is the one thing I can’t forgive and if he had slept with her it wouldn’t be as bad to me as it would be more of a moments decision. Where as he has said he loves her and they have an emotional connection. He said that it hasn’t been going on for a year but on and off for that time. But I now feel that he has made that decision to cheat more than once.
On top of this, we went to her birthday party as a family, after we had our son (5 weeks ago) we had a family day out planned and he invited her and her son along, which she came, he has bought her and me the same gifts, and he was arranging for me to look after her son while they went to work as she was having childcare issues and that is my field of work. I just feel he has totally gaslit me and made a complete fool out of me.

I have made my choice and he has left. I believe the words I read in those messages and not the excuses he is coming out with now.
I just wanted to put it into words and see what others thoughts are?
Sorry for the long post.
I hope that makes sense.

OP posts:
Calamitousness · 08/09/2025 11:06

No advice but I’m sorry you’re going through this. Please don’t let him gaslight you. You’re right in your thinking and what you know has happened.

Themagicfarawaytreeismyfav · 08/09/2025 11:08

You have absolutely done the right thing OP. He will be lying through his teeth and minimising everything he has done, stay strong you will get through this.

BeltaLodaLife · 08/09/2025 11:11

You’re doing the right thing. He’s been doing this while you were pregnant, and while you had a brand new baby. It absolutely shows that he really doesn’t care about you or the family he was risking.

Don’t back down. Don’t take him back. It’s better to be alone than to be with someone you cannot trust and who doesn’t have your back they way he should.

Busted2006 · 08/09/2025 11:12

So sorry OP, but surely there’s no coming back from this?

The last part really stuck out to me, he invited her and her son out with you and he had arranged for you to look after her son whilst they went away for work. That hardly sounds like a man who’s being manipulated does it.

Shes been in plain sight all along and lets be honest the trip away would of probably ended up with them having sex, if it hasn’t happened already

SweetPenelope · 08/09/2025 11:13

Personally I wouldn't make major decisions while in the fog of having a newborn baby.

ShesTheAlbatross · 08/09/2025 11:15

He’s saying I’m being unreasonable by splitting up as we’ve been together 16 years and surely that’s worth fighting for

This is such bullshit. Why didn’t he fight for it instead of having an affair?? Why must you be the one to do it. The absolute nerve to cheat and then say the other person isn’t fighting hard enough for the relationship.

DuckbilledSplatterPuff · 08/09/2025 11:30

So sorry this has happened to you when you are getting used to your five week old baby.
His behaviour is staggering.
Getting you to do childcare for OW whilst they go away "for work" really takes the biscuit.
Then blaming you for not working hard enough at the relationship. FFS

He's a liar and a cheat.

I hope you have family and friends you can lean on at this time.

Catsandcannedbeans · 08/09/2025 11:35

What a fucking rat. Also, he probably has done more than kiss and cuddle if it’s been going on a year. Well done for getting rid of him and don’t fall for the “is 16 years not worth fighting for” thing - sunk costs fallacy.

Rightandwrong · 08/09/2025 11:42

You've done exactly the right thing OP.
What a cheating scumbag he is.
You can be sure he is minimising the physical contact - if he is admitting kissing and cuddling it will be far more than that. But as you say telling her he loves her is far bigger betrayal.
And the fact he is putting the blame on her for the affair speaks volumes about him.
I'm so sorry he has betrayed you and your children and your lovely wee baby.
I hope you have friends and family around you to support you.

MrTiddlesTheCat · 08/09/2025 12:46

That's a new low, bringing the OW along on family days out. As for getting you to look after her kid so they can go off together, I have no words.

Coldnightsapproachingwhereismyduvet · 08/09/2025 12:48

Good for you op. Too many people allow cheating men to worm their way out of taking responsibility.. The blame for the split falls solely at his feet..

Pessismistic · 07/12/2025 13:48

Sorry op he is a selfish twat your not the fool he is. you took it as a friend helping another friend. I’m sorry this has happened so soon after your dc. men just don’t get you can’t cheat for a year then come up with excuses that is even more disrespectful to you as he’s trying to treat you as an idiot but it’s him being an absolute disgusting human. Op keep strong he threw 16 years away for a kiss and cuddle no sorry I’m not buying it she might be gay doesn’t mean she’s not into men.

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