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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:
MyDeftDuck · 24/02/2026 07:58

Personally, I would be having a discrete word with BIL and asking for an explanation. It could be innocent but more likely he’s having an affair which will blow his marriage apart…….unless he has a very understanding wife.

nomas · 24/02/2026 08:05

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?

What do I do?

Explain who BIL is for a start.

It’s not rocket science, tell your sister or husband.

BeaRightThere · 24/02/2026 08:08

I can't imagine anyone sending a message like that seriously so I would learn towards jokey hyperbole. Of course anything is possible

HK04 · 24/02/2026 08:10

Wind up post 🚩?

AldiLidlDeeDee · 24/02/2026 08:11

mindutopia · 24/02/2026 07:56

Is he at home now or at work or elsewhere? Because unless he is usually quite a romantic flowery writer, this sounds like his mates at work getting his phone to play a mean prank. I don’t think men typically speak like this, even to affair partners they are shagging behind their wife’s back. It sounds like something stupid and over the top that someone would say to take the piss if they got ahold of someone’s phone.

They definitely do change their prose when having an affair!

I discovered my ex’s draft word doc on our shared computer many years ago that was littered with basic French terms of endearment. He hadn’t even studied French at school!

OP, screenshot the message and send it to your sister/sil. She needs to know so she can decide what to do before he tries to lie and make stupid excuses.

Furlane · 24/02/2026 08:13

LoudSnoringDog · 24/02/2026 07:19

Imagine he might use this as his daft excuse

But it would be clear in the context surely. If someone from work did me a massive favour, I might reply with something like that (and have). If the response was in relation to something entirely different then it will be clear, or he would have deleted the message which shows it’s not above board.

Boomer55 · 24/02/2026 08:16

It sounds like a joke to me.

OTT language, and if someone is having an affair, they are usually very careful about making sure messages go to the right person.

fungibletoken · 24/02/2026 08:22

I'm also a bit dubious about the language. It doesn't scream illicit affair - possibly even something I'd send to a child.

Sausageroll99 · 24/02/2026 08:26

How do you know he sent it by mistake? How do you know R is someone he works with? You’re not giving us the full story.

I’d meet up with wife then say randomly, “Oh your DH is a laugh, look what he sent me by mistake. Who’s he professing his undying love to?” Treat it all as a joke then take your cue from his wife.

Thecatandme · 24/02/2026 08:28

From a man’s point of view it doesn’t sound much like something any of my male friends would send if they were having an affair

I did, however, send a not dissimilar message to one of our female friends who said she would look after my cat while we went on holiday

I’d be wary of making too
many assumptions about this without more information

Silverbirchleaf · 24/02/2026 08:29

Topseyt123 · 24/02/2026 07:28

Whichever type of BIL he is (husband's brother or sister's husband), I would text back.

Something like "I've taken a screenshot of this. Speak to your wife now before I do it for you as you're clearly up to something."

Yes, so thing like this.

beAsensible1 · 24/02/2026 08:30

Mmmmm it could be an affair or they could’ve saved his arse it work for something?

I use a very very similar phrase when someone does me a big favour

Gettingbysomehow · 24/02/2026 08:30

Id write that to someone who bailed me out at work.
Just ask him what its about preferably in person. You can normally work out whats going on my their reaction.

Sausageroll99 · 24/02/2026 08:31

So there was no kiss or heart emoji at the end? I suspect it’s a joke to a colleague.

johntorodesfatcheeks · 24/02/2026 08:31

Was it a WhatsApp or a text? He could delete the WhatsApp for everyone including you
that’s aside it’s either a joke or the shit has hit the fan

MyThreeWords · 24/02/2026 08:34

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PurpleThistle7 · 24/02/2026 08:34

i think it’s a joke as that doesn’t sound sexy or secretive at all. I’ve definitely sent similar to coworkers

CanIRetirePlease · 24/02/2026 08:35

Gettingbysomehow · 24/02/2026 08:30

Id write that to someone who bailed me out at work.
Just ask him what its about preferably in person. You can normally work out whats going on my their reaction.

Yes yes - I might have said that to someone who for example dug me out of a shitstorm at work, or covered a shift for me or whatever . Male or female. though it would be accompanied by !!! And an emoji or two

Very weird message “you are the light of my life” is such an odd turn of phrase for an AP I’d have thought

catipuss · 24/02/2026 08:39

How do you know it was by mistake, maybe he meant it for you seriously or having a joke. I would reply 'I didn't know you cared, but my DH is coming round to have a word...'

MilanoCortina2026 · 24/02/2026 08:41

MyDeftDuck · 24/02/2026 07:58

Personally, I would be having a discrete word with BIL and asking for an explanation. It could be innocent but more likely he’s having an affair which will blow his marriage apart…….unless he has a very understanding wife.

I wouldn't be discreet at all. I'd do what someone above suggests and send it to his wife saying this is for you, he sent it to me by mistake. Don't give him the opportunity to weasel his way out by minimising as he will if you try having a "discreet word", but either way he'll be rattled and so he should be.

Allisnotlost1 · 24/02/2026 08:45

HighStreetOtter · 24/02/2026 07:50

Because it’s too earnest. Too over the top. If a female colleague who I get on with picks some work up for me I message back saying “love you”. I don’t actually love them nor am I having an affair. It could be along those lines.

If a work colleague texted my personal phone saying ‘I love you’ for any reason I’d be quite unhappy. It’s not appropriate workplace conversation is it?

youbizarrehorse · 24/02/2026 08:45

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duckydoo234 · 24/02/2026 08:47

BIL is the OP, sent the message in error, and is now trying to gauge what level of shit he's in.

PersimmonsAreNotTheOnlyFruit · 24/02/2026 08:47

Sent at 7am?
That is definitely the type of ́message I might send a work colleague if I woke up, looked at my emails and saw they had fixed an issue for me overnight and wanted to acknowledge it.

Doesn't mean they aren't having an affair but other plausible explanations exist.

Ceramiq · 24/02/2026 08:49

My sister (when married) sent a message of this type to my husband, to whom the message was clearly not destined. We said nothing to anyone but I did mentally store it as future ammunition - my sister is notoriously tricky and manipulative.