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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

Not to have known his true age before sleeping together?

487 replies

Lockingthegins · 20/12/2025 22:03

He’s bloody 18! Not 19 until April

Casual conversation and flirting lead to hotel room and sex.

Really mortified to discover he is actually 18. No, he didn’t actually tell me. I assumed he was about 21. I am 28.

I feel so, so awful. Really panicked when I found out the morning after. He doesn’t seem bothered and thinks it’s all fine. Grinning like a Cheshire ca

Good lord, I haven’t scarred him for life, have I? Please someone assure me I’m not sick in the head

I would be furious if I was his mum!

OP posts:
BluntAzureDreamer · 20/12/2025 22:27

This sort of happened to me once, I was 35, I was fresh out my marriage and had ONS with a guy who turned out to be 21. Told me he was 26 😂. It was fun. Don't sweat it

Carycach4 · 20/12/2025 22:28

RollyPollyBatFace · 20/12/2025 22:21

Well as the mother of a 19 year old son, yeah, I’d be unimpressed with you that’s for sure

having said that, I’m not likely to know so meh

but next time - check? It’s only by luck he wasn’t 17. And are you really telling me you couldn’t tell he was 18?!

If he had been 17, it still wouldn't be illegal

Needmorelego · 20/12/2025 22:28

DeathStare · 20/12/2025 22:14

Well you lucked out didn't you? He could just as easily have been 17. Next time check.

17 is legal 🤔🤷

Branleuse · 20/12/2025 22:28

Oh Jenny don't be hasty!

Drivinghomeforchristmas25 · 20/12/2025 22:28

Yikes, some of these replies! Yes, at 18 I slept with men who were 28. And at 14, I absolutely looked old enough to buy a drink in any pub (and I did, many times!) And I turned out absolutely fine,
He was a consenting adult op, don’t worry about it.

tikkl · 20/12/2025 22:29

This seems fine to me. But then I'm in my 50s and both of you are mere (adult) babies as far as I'm concerned.

Now, if I was sleeping with him, THAT would be an ick.

Needmorelego · 20/12/2025 22:29

Makemeanonymous · 20/12/2025 22:17

And you are equally approving of a 28 year old guy having a ons with an 18 year old woman?

Would he be a a " happy memory" to her dying day?

If she consented and enjoyed it why would it be an issue?

shhblackbag · 20/12/2025 22:31

Lockingthegins · 20/12/2025 22:12

Yes I did. But now I feel so much remorse and shame

Why? He's an adult. Not sure what difference four months until April would have made.

Missj25 · 20/12/2025 22:34

Lockingthegins · 20/12/2025 22:12

Yes I did. But now I feel so much remorse and shame

Oh don’t feel bad OP .
You thought he was older , I think all the younger lads & girls look older than what they are now, & you’re 28 not 38 ! Story could be a lot worse 🤷🏻‍♀️

suburberphobe · 20/12/2025 22:37

Pathetic.

t'is no problem.

Older men with younger women do not seem a problem.

Older women with younger men are. Just misogenistic,

Mine is 20 years younger. Nobody cares. Not one of our friends.

TrishM80 · 20/12/2025 22:39

18 year old boys very much much look like boys. There's a big difference between an 18 year old boy and a 21 year old man, there can be no mistaking it.

Needmorelego · 20/12/2025 22:40

TrishM80 · 20/12/2025 22:39

18 year old boys very much much look like boys. There's a big difference between an 18 year old boy and a 21 year old man, there can be no mistaking it.

An almost 19 year old "18 year old boy" isn't a boy.
He is an adult.

CarraghInish · 20/12/2025 22:40

Lockingthegins · 20/12/2025 22:12

Yes I did. But now I feel so much remorse and shame

Don’t be ashamed! He was clearly delighted and you didn’t do anything wrong. This is like that episode of Friends, “The One with the Ick factor”. You are his beautiful Courtney Cox.

SapphireSeptember · 20/12/2025 22:42

My mum met my dad when she was 17 and he 27. 38 years later and they're still together.

seaelephant · 20/12/2025 22:42

I'm also late 20s and while I'd be a bit skeeved, I wouldn't bother feeling ashamed or guilty, just laugh at yourself and move on

Fairyliz · 20/12/2025 22:42

I bet he thought Christmas had come early.

You have made a young man very happy op.

Tink3rbell30 · 20/12/2025 22:43

Gross. He'll be telling everyone.

NewNameforThisPost2025 · 20/12/2025 22:43

DeathStare · 20/12/2025 22:14

Well you lucked out didn't you? He could just as easily have been 17. Next time check.

17 would still have been legal.

This reminds of the storyline in Friends where Monica thought she was dating a college senior....He was a senior all right. In high school! So she thought he was 21 or 22 when he was in fact 17 or 18 - I believe he turned out to be 17. It was sort of funny, but not really.

Jumpingthruhoops · 20/12/2025 22:45

Age of consent is 16, no? That being said, I don't know any 16, 17 or 18yo boy that doesn't look his age, so YABU to have assumed he was anywhere near 21!

Dollymylove · 20/12/2025 22:45

Calm down!! Assuming you didnt tie him to the bed and ravish him (although some men would probably enjoy it)
You havent done anything wrong. I doubt many 18 year olds discuss their sex lives with their mothers, and if hes told his mates, he'll be hailed a hero for pulling a 28 year old 🤣🤣

theunbreakablecleopatrajones · 20/12/2025 22:46

It's fine!

Just chalk it up, you'll know to ask next time, and as he's well over the age of consent, no harm done

His mum has nowt to do with it, he is an adult and you aren't getting engaged

BurntBroccoli · 20/12/2025 22:46

Honestly - it’s absolutely fine!

Rafting2022 · 20/12/2025 22:48

TrishM80 · 20/12/2025 22:39

18 year old boys very much much look like boys. There's a big difference between an 18 year old boy and a 21 year old man, there can be no mistaking it.

Exactly! No way you had no idea.

BurntBroccoli · 20/12/2025 22:49

NewNameforThisPost2025 · 20/12/2025 22:43

17 would still have been legal.

This reminds of the storyline in Friends where Monica thought she was dating a college senior....He was a senior all right. In high school! So she thought he was 21 or 22 when he was in fact 17 or 18 - I believe he turned out to be 17. It was sort of funny, but not really.

Why was it not really funny? Age of consent is 16?

MarvellousMonsters · 20/12/2025 22:49

Lockingthegins · 20/12/2025 22:03

He’s bloody 18! Not 19 until April

Casual conversation and flirting lead to hotel room and sex.

Really mortified to discover he is actually 18. No, he didn’t actually tell me. I assumed he was about 21. I am 28.

I feel so, so awful. Really panicked when I found out the morning after. He doesn’t seem bothered and thinks it’s all fine. Grinning like a Cheshire ca

Good lord, I haven’t scarred him for life, have I? Please someone assure me I’m not sick in the head

I would be furious if I was his mum!

You haven’t scarred him for life, you’ve done nothing wrong. It was a consensual ONS, not an arranged marriage. Take the compliment and move on.