To not tell her parents?

Of course they will (as we all did) BUT, not in a home that parents would think is safe.

Im assuming you are being sarcastic.

I actually think the sex itself is a red herring.
If teenagers want to have sex with each other they will find a way to do it. Much like they find a way to vape or drink underage if they want to.

Ideally they wait but over a third of teens have sex before they are 16 and shaming them and hammering down on it being "illegal" just makes them think it is wrong and sets them up for an unhealthy attitude and shame towards sex - which should through out their lives be fun.

The sneaking is the biggest issue, bringing a stranger into the home without you knowing is unfair and put you OP in a horrible position.

My own children are only 4 and 6 and I can't currently watch them 24/7 so God knows how some of you expect OP to watch a room of teens constantly.

We should be giving our teens more freedom, and we should expect them to make really fucking stupid choices as well as really smart ones. It is our job as parents to guide them at this age. Not helicopter over them constantly.

Sure it’s a parents’ job to make sure complete strangers don’t sneak into their house without their knowledge or permission for any reason, including to have sex with a guest.

I'm not suggesting that at all but, maybe not allowing sleepovers and not checking in on them would not be creepy. Its more creepy that a15 year old is having sex in a spare bedroom and the parents weren't aware (and the younger kids in the house saw him and was scared) is more creepy!

We have gone far too soft on teens. Blaming this lady is ridiculous. Had this happened in the 90s we (teens) would all have been in big trouble. Nobody would have pointed the finger at the parents. We were trusted and if that trust was broken we were expected to take full accountability for our actions.

Dont be silly.

If my friend didn’t tell me that my child slept with someone while under their care, I’d honestly be furious. You need to be honest with them. You’re being too much of a friend to this girl, she’s not your mate she’s someone’s child and you’re a parent.

But no matter how much you try to supervise your teens, they will still find a way to have sex if that’s what they want to do. Are you suggesting that 15 year olds shouldn’t be allowed meet their friends during the day without supervision? My parents were quite strict about how late I was allowed to stay out in the evening, because I ‘might get up to no good’ with my latest boyfriend. They didn’t seem to understood that the ‘no good’ could still happen at 11.30 in the morning or in the afternoon! It was a complete breach of trust on the part of the OP’s daughter and friends to smuggle anyone into the house without permission, whether make or female, and I don’t think the OP is in any way to blame for this.

@penflapup what an awful thing to accuse someone of ffs what is wrong with you

Yes that’s completely unacceptable and the parents need to know. Teenagers hook up and sneak around, but it’s the adults jobs to make sure the environment is safe for them. Not knowing he was there, scaring a younger child, and then then having s*x in your house is just not cool. I wouldn’t be letting my daughter have any sleepovers at all

Concerns, as the responsible adult, about under age sex of visitors to your house and strangers in your house through the night is not 'pearl clutching'.

No such thing in the UK. Police wont be remotely interested in a 16 year old boy and a 15 year 11 month old girl having a stag.

Paticulstly when at the same time some posters are implying the boy who is just 3 months older is some kind of abuser.

The police are still not going to prosecute though assuming it was consensual
Thats some 16 year old managing to groom not ust his girlfriend but also all of her friends...

Underage pregnancy happens but the police wouldnt prosecute if there was only 3 months between
So its likely there was found to be some coercion .

@GertrudePerkinsPaperyThing Yes This! Not to mention even if it was a criminal offence, sex between two teens close in age is not in the public interest to go down the rabbit hole of prosecution.

The age of consent laws are not there to stop teens having sex with each other. They are there to help protect them from abuse.

Technicaly if they are both under 16 they are both having sex with a minor which is illegal but the police woukdnt prosecute .

I’m glad you’ve seen that you absolutely must tell the parents OP.

They’re not. You’re not committing a criminal offence to do this unless over 18.

The only way to stop it is by following them and being with them 24/7.

Which would be a bit creepy.

So all the girls, including your daughter, were in on it? I’d be bloody furious firstly! How dare they betray your trust like that! Your daughter would be in serious trouble if she was mine.
In light of this, I think you need to inform ALL of the parents.

I also would love it if we stopped calling teenagers children, they are teenagers, adolescents. Infantilising them constantly is not helpful.

Some of the reactions here are bonkers.

The age of consent laws aren't in place to stop teenagers shagging each other it is to protect them from abusive interactions with older people.

Over a third of UK teens have sex before 16 it isn't something shocking, and it isn't a law designed to punish teens or parents of teens.

I would speak to the other girls parents OP say they snuck in a boy, but that they will need to clarify what actually happened with their daughter.

You are not a bad parent for "letting" this happen, teens are hormonal and developing a sexuality is normal.