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Relationships

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

BIL Text Me In Error-he is having an affair?

230 replies

Robertsmithsnan · 24/02/2026 06:48

I sent my BIL a message last week, my name starts with R.
Received a message at 7am, “R, you are the light of my life, I love you with all my heart”
He sent this to me by mistake.
The “R” person is someone he works with. What do I do?

OP posts:
ClairDeLaLune · 24/02/2026 13:25

It’s your BIL not you who has blown up your sister’s life.

And probably also his own, as it’s likely he’ll be on a harassment accusation at work if he carries in with that nonsense.

What a twat.

You did the right thing OP.

outerspacepotato · 24/02/2026 13:27

Your sister's husband blew up her life. He's cheating or trying to cheat. He's keeping his marriage to have a cozy nest unless the OW would have him, them he'd more than likely dump your sister. You merely brought his cheating out into the open. At least now she knows and he can't blindside her and she knows she's his second choice at this time.

I think you did the right thing.

Has this been mutual or is he harassing a coworker?

TheRuffleandthePearl · 24/02/2026 13:29

Harrietsaunt · 24/02/2026 13:16

I’m a bit confused. Is OW actually an OW?

Or is she innocently going about her job and getting harassed by BIL with his pathetic declarations of unrequited love?

I doubt we will ever know. It all sounds very … odd

WilfredsPies · 24/02/2026 13:31

LadyLovesShallots · 24/02/2026 13:01

If the OW wants nothing to do with him, is this affair a figment of his imagination - or have they had a relationship?

The OW wants nothing to do with him.

I can't get my head around this.

Edited

I think this might be a case of the other woman being quite happy to have something exciting and secret going on, but when it comes to the reality of taking this cheater on full time, and potentially breaking up her own marriage, suddenly it’s all a bit real and not what she wants.

Notasbigasithink · 24/02/2026 13:31

Robertsmithsnan · 24/02/2026 12:04

This is my sisters husband.
He works with this woman.
This isn't a joke. The message was meant for his work colleague who's name starts with R (as does mine).
I replied I dont think my sister would be very impressed with your messaging another woman
I called my sister and told her. Sent her a screen shot.
He has deleted all messages, historic. She can't get them reinstated.
He told her he thinks he loves this woman. The OW wants nothing to do with him.
A total shitfest. I've blown my sisters life up

You've not blown your sisters life up, her twat of a husband has!
This might hurt like hell atm but better your loyalty to your sister now than his dirty little secret comes our in a few months time and she realises you knew all along!

Maray1967 · 24/02/2026 13:32

bigboykitty · 24/02/2026 12:08

Sorry for all the dickhead trollhunters on your thread. You didn't blow up your sister's life - he did that himself. If he's in love with someone else, she deserves to know and I would have done the same.

Yes, absolutely. She deserves- and needs - to know.
He has blown up your sister’s life.

What a disgusting man. Messsging love to another women while keeping his wife in the dark. Presumably he was testing the water and would have said nothing if he’d known the OW wasn’t interested.

But your sister would have been left living with a liar and a fraud, which is not good.

SonsRfab · 24/02/2026 13:34

BalletSki · 24/02/2026 12:06

No. Your BIL blew your sister's life up

This. You did the right thing.

PolkaDotShooter · 24/02/2026 13:35

Is the ow married /

If so her husband needs to know.

Let that be the next course of action.
Also advise your sister to get her sexual health tested.

Daleksatemyshed · 24/02/2026 13:38

You've done nothing wrong @Robertsmithsnan . If the OW isn't interested then good for her but your BIL would have an affair with her any day if she'd said yes. If he's pestering a coworker he could end up losing his job, a double whammy for your poor sister

Daygloboo · 24/02/2026 13:42

Robertsmithsnan · 24/02/2026 06:48

I sent my BIL a message last week, my name starts with R.
Received a message at 7am, “R, you are the light of my life, I love you with all my heart”
He sent this to me by mistake.
The “R” person is someone he works with. What do I do?

Thing is, if you dont tackle it, it will become the elephant in the room so....

LiesDoNotBecomeUs · 24/02/2026 13:43

You didn't blow up her life - he did.
He is the one looking elsewhere.
By sending the message to you - he made it public.

You are loyal and loving ...as he should be.
He didn't get you to betray her too.

Secrets like that are slow poison.

SandyY2K · 24/02/2026 13:48

Robertsmithsnan · 24/02/2026 12:04

This is my sisters husband.
He works with this woman.
This isn't a joke. The message was meant for his work colleague who's name starts with R (as does mine).
I replied I dont think my sister would be very impressed with your messaging another woman
I called my sister and told her. Sent her a screen shot.
He has deleted all messages, historic. She can't get them reinstated.
He told her he thinks he loves this woman. The OW wants nothing to do with him.
A total shitfest. I've blown my sisters life up

It's down to BIL. His actions have led to this.

BrewDingBoudicca · 24/02/2026 13:49

The only person blowing her life up is him.

Thankfully, she has one person who is loyal to her and has her back - you!

Now she has the information, she can think about what she wants to do next and be under no illusions about her 'D'H.

Loveapineapplepizzame · 24/02/2026 13:54

You did the right thing OP.

As hard as the situation is right now, there is also the possibility that he most likely if OW wanted him, would have left your sister even more heartbroken. He even could have just left and not told her the reason

So she knows now. She holds all the knowledge and the power

Please please do urge her to absolutely take him to the cleaners. And I’d also advise your sister to get checked.

mindutopia · 24/02/2026 13:59

You have absolutely not blown anyone’s life up.

Iwanttocomebackasmycat · 24/02/2026 14:00

UpDownAllAround1 · 24/02/2026 07:09

How do you know it is someone he works with?

This is my question too. Is this real, or just a hypothetical?

Ophir · 24/02/2026 14:02

You did the right thing @Robertsmithsnan

Ive been in your sisters position and was grateful to have been told

RedToothBrush · 24/02/2026 14:04

Robertsmithsnan · 24/02/2026 12:04

This is my sisters husband.
He works with this woman.
This isn't a joke. The message was meant for his work colleague who's name starts with R (as does mine).
I replied I dont think my sister would be very impressed with your messaging another woman
I called my sister and told her. Sent her a screen shot.
He has deleted all messages, historic. She can't get them reinstated.
He told her he thinks he loves this woman. The OW wants nothing to do with him.
A total shitfest. I've blown my sisters life up

No you told her what she needed to know.

He blew up his own life.

If it wasn't this woman it would be the next.

She's now able to make that decision before wasting anymore of her life with this prick. She will come round.

RedToothBrush · 24/02/2026 14:06

Remember: If you didn't tell her and she found out you knew later on that would be worse.

WeekendTripHelp · 24/02/2026 14:06

Robertsmithsnan · 24/02/2026 12:04

This is my sisters husband.
He works with this woman.
This isn't a joke. The message was meant for his work colleague who's name starts with R (as does mine).
I replied I dont think my sister would be very impressed with your messaging another woman
I called my sister and told her. Sent her a screen shot.
He has deleted all messages, historic. She can't get them reinstated.
He told her he thinks he loves this woman. The OW wants nothing to do with him.
A total shitfest. I've blown my sisters life up

HE blew her life up.

Anyahyacinth · 24/02/2026 14:06

Robertsmithsnan · 24/02/2026 12:04

This is my sisters husband.
He works with this woman.
This isn't a joke. The message was meant for his work colleague who's name starts with R (as does mine).
I replied I dont think my sister would be very impressed with your messaging another woman
I called my sister and told her. Sent her a screen shot.
He has deleted all messages, historic. She can't get them reinstated.
He told her he thinks he loves this woman. The OW wants nothing to do with him.
A total shitfest. I've blown my sisters life up

You haven't..BIL did ...noone wants a life with a cheater. I'd want my sister to tell me

Toomuchprivateinfo · 24/02/2026 14:08

You didn't blow up her life, he did.

I assume if your husband was having an affair, you'd want to know. You've done her the same favour.

BeaRightThere · 24/02/2026 14:09

This reply has been deleted

Message deleted by MNHQ. Here's a link to our Talk Guidelines.

hypnovic · 24/02/2026 14:11

Robertsmithsnan · 24/02/2026 12:04

This is my sisters husband.
He works with this woman.
This isn't a joke. The message was meant for his work colleague who's name starts with R (as does mine).
I replied I dont think my sister would be very impressed with your messaging another woman
I called my sister and told her. Sent her a screen shot.
He has deleted all messages, historic. She can't get them reinstated.
He told her he thinks he loves this woman. The OW wants nothing to do with him.
A total shitfest. I've blown my sisters life up

No he did

JustMyView13 · 24/02/2026 14:19

@Robertsmithsnan Your BIL blew his wife (your DS) life up. Not you. Don’t take responsibility for this cheating bastards actions. He was so comfortable in his lie he stopped trying to hide it.