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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

To tell stepson’s girlfriend she’s not sleeping over again after what I walked in on??

598 replies

AutumnMum28 · 30/09/2025 14:10

DSS (17) has had his girlfriend over a few times now, I’ve been fine with it, they sit in the living room with snacks and films etc, nothing major. Last night OH was on nights and I went up early with baby (who doesn’t sleep 🙄). Came down about midnight because I’d left washing in the machine and nearly had a heart attack when I walked past the living room… let’s just say I saw FAR too much, blanket half on the floor, both of them half naked 😳 I honestly feel sick even writing this.

I didn’t say anything in the moment, just stomped upstairs, but now I feel so uncomfortable in my own house. I’ve got younger DC (10, 5, 17mo) and it just doesn’t sit right at all. He’s technically still in sixth form, under our roof, and I don’t want this kind of thing going on.

OH says “he’s nearly an adult, better they’re safe here than in the park” 🙄 but I don’t want my home turning into a hotel room. I don’t even know how to look her in the eye now, poor girl looked mortified too.

So AIBU to tell him she’s not sleeping over anymore? Or do I need to suck it up and accept it?

OP posts:
Perfect28 · 30/09/2025 17:00

I'm not trying to be rude but what did you think they were getting up to? Sharing popcorn?

Minnie798 · 30/09/2025 17:00

EvangelicalAboutButteredToast · 30/09/2025 16:56

So we have to decide if this is a child or an adult. My feeling is it’s one of those manchildren who wants to do the sex stuff without the responsible stuff. So shag in a communal space while there are young kids about but not bother picking up his dirty pants and clearing away the plates from the snack he had. That’s the person I’m envisaging.

Eh? Why?

Rosscameasdoody · 30/09/2025 17:00

TwistedWonder · 30/09/2025 16:58

Completely agree. The boy has absolutely no privacy whatsoever whereas his significantly younger siblings all have their own rooms. Other than when he’s in the bathroom, when is he afforded the respect of his own space?

So what does OP do - they can’t magic up another room.

PeachyKoala · 30/09/2025 17:01

AngelicKaty · 30/09/2025 16:57

Well done for taking that out of the context of my entire comment. The point is this is OP's joint home that she pays towards - he doesn't. How anyone can think that his desires should take precedence over the homeowner's is astonishing.

Homeowner or not he is a child she is responsible for. He should have a bedroom FFS. The fact he doesn't is disgusting and the OP has completely buried the lede. It's literally the bare minimum to provide a private space for a child living in the home.

whatasillygoose · 30/09/2025 17:01

Rosscameasdoody · 30/09/2025 16:59

You’d have to ask OP that. There may be a very good reason. He may have been full time with mum for some reason. Not everyone can just up and move, and not everything is sinister. Some things are just circumstance.

Seems like a choice was made at some point that this lad didn’t need a room at his dad’s house. Blending a family and adding more children is a choice.

MeropeRiddle · 30/09/2025 17:01

EvangelicalAboutButteredToast · 30/09/2025 16:58

Of course it’s him being inappropriate. Social decency tells you that shagging your girlfriend in the living room when there are little kids in the house is deeply unpleasant. That shouldn’t need spelling out.

You don’t get to shove a teenager into the living room for a year and then clutch your pearls when he treats it like a bedroom. If you label it his space, then it is his space — you can’t downgrade it back to ‘communal’ just because you didn’t like what you walked in on.🙄

Lavender14 · 30/09/2025 17:02

EvangelicalAboutButteredToast · 30/09/2025 16:56

So we have to decide if this is a child or an adult. My feeling is it’s one of those manchildren who wants to do the sex stuff without the responsible stuff. So shag in a communal space while there are young kids about but not bother picking up his dirty pants and clearing away the plates from the snack he had. That’s the person I’m envisaging.

What tf is wrong with you? You've absolutely nothing to suggest that. So now only adults who are clean and tidy and do their dishes are allowed to have sex? Your argument is nonsensical.

Did you understand my point about childhood being a scale? Legally he's a child. Legally at 17 there's also a whole pile including having sex that he can do - why? Because -crucially to this argument - it's deemed as appropriate for his age and capacity.

And most importantly, his father as his parent in this scenario, has set the boundary that he's allowed to have sex and overnights with his gf.

PeachyKoala · 30/09/2025 17:02

Rosscameasdoody · 30/09/2025 17:00

So what does OP do - they can’t magic up another room.

Her and her DH should either have the baby in with them and the DSS go in the box room or they should take the living room themselves.

Onlycoffee · 30/09/2025 17:02

AutumnMum28 · 30/09/2025 14:31

No he doesn’t even have his own room 😩 that’s half the issue!! We’ve only got 3 bedrooms so DS1 has his little Lego shrine room, the 2 little ones (5 + baby) are crammed in the box room, and me + OH in the main. DSS has been on a sofa bed in the living room since he moved in full time last year. It’s not ideal but what can we do, can’t magic another room.

I haven’t spoken to him yet, OH just sort of shrugged and said “he’s nearly 18, leave him be” 🙄 which is easy for him to say when he wasn’t the one who walked in!! I feel so awkward I can’t even look at DSS this morning, he just sloped off to sixth form like nothing happened. Not sure if OH will actually say anything to him either tbh, he hates confrontation.

I just don’t know what the right balance is, like I get he’s nearly grown up but surely in OUR family living room when the little ones could come down any time isn’t on??

But what do you expect when he doesn't even have his own room?

I mean, as long as ds1 has his lego shrine, I guess that's more important than a sixth former having his own room for study and privacy,
Oh wait, no it's not.

AngelicKaty · 30/09/2025 17:02

MidgesonMull · 30/09/2025 16:54

her DH is his father, ffs!
The lad has every right to expect that his own parent might accommodate him. It's not his fault that his parents split up. What a horribly disrupted life he has.

And presumably he's been living with his other parent until a year ago and has now moved in with his DF and his family that was already at full capacity, space-wise, before he arrived a year ago (for a reason OP hasn't explained). I think OP has been very reasonable allowing her DSS to move in and creating an over-crowded living situation - she shouldn't now be made to feel uncomfortable in her own home.

Bumdrops · 30/09/2025 17:03

EvangelicalAboutButteredToast · 30/09/2025 16:58

Of course it’s him being inappropriate. Social decency tells you that shagging your girlfriend in the living room when there are little kids in the house is deeply unpleasant. That shouldn’t need spelling out.

Social decency is providing for a dependant -
he is still in formal education
he is being treated like a hobo in his own family

social decency is giving privacy and space within a family setting,

social decency is about not giving mixed messages - you can have your girlfriend stay over, and sleep with u but no intimacy ??

this is your bedroom but it is our family lounge - social decency says we have moved away from such Victorian slum dwelling for our children

this young man must only have access to the toilet for any privacy ….

is that all he is worth ?? Let’s try and aim a little higher rather than justify this situation ???

Rosscameasdoody · 30/09/2025 17:04

EvangelicalAboutButteredToast · 30/09/2025 16:58

Child or adult? Quick decide.

If he’s a child he shouldn’t be having sex, so adult.

AngelicKaty · 30/09/2025 17:04

Lavender14 · 30/09/2025 17:02

What tf is wrong with you? You've absolutely nothing to suggest that. So now only adults who are clean and tidy and do their dishes are allowed to have sex? Your argument is nonsensical.

Did you understand my point about childhood being a scale? Legally he's a child. Legally at 17 there's also a whole pile including having sex that he can do - why? Because -crucially to this argument - it's deemed as appropriate for his age and capacity.

And most importantly, his father as his parent in this scenario, has set the boundary that he's allowed to have sex and overnights with his gf.

So OP doesn't get any say about what goes on in her home and she just has to suck it up, does she?

Rosscameasdoody · 30/09/2025 17:05

Bumdrops · 30/09/2025 17:03

Social decency is providing for a dependant -
he is still in formal education
he is being treated like a hobo in his own family

social decency is giving privacy and space within a family setting,

social decency is about not giving mixed messages - you can have your girlfriend stay over, and sleep with u but no intimacy ??

this is your bedroom but it is our family lounge - social decency says we have moved away from such Victorian slum dwelling for our children

this young man must only have access to the toilet for any privacy ….

is that all he is worth ?? Let’s try and aim a little higher rather than justify this situation ???

And again, how do you magic up another room ?

TheatricalLife · 30/09/2025 17:05

EvangelicalAboutButteredToast · 30/09/2025 16:56

So we have to decide if this is a child or an adult. My feeling is it’s one of those manchildren who wants to do the sex stuff without the responsible stuff. So shag in a communal space while there are young kids about but not bother picking up his dirty pants and clearing away the plates from the snack he had. That’s the person I’m envisaging.

That seems very unfair considering the OP has said nothing of the sort about him.
Just because he has sex with his girlfriend he's suddenly some sort of slob who throws his clothes everywhere and leaves dirty plates out? How does that tie together?
I'm assuming he has no bloody space to put his pants anyway seeing as he isn't even afforded a bed in his own home.
We don't have to decide if he is an adult or child. He's 17. That's what he is. Old enough legally to do some things and not others.

MeropeRiddle · 30/09/2025 17:05

Minnie798 · 30/09/2025 17:00

Eh? Why?

Exactly, Minnie. Why should we decide when neither fits.

This isn’t some binary quiz where you tick ‘child’ or ‘adult.’ Seventeen is late adolescence — not fully grown, not a kid either. That’s exactly why blunt takes like this don’t work. Nuance matters here, not fantasy categories that ignore reality.

Anonomoso · 30/09/2025 17:05

PeachyKoala · 30/09/2025 16:49

Why should he pay rent when he doesn't even have a room? Get real!

Maybe he, and his girlfriend also don't eat any food OP may buy, watch TV, use the broadband, take a shower, wash his clothes or use any gas/electricity while they're there.

Lavender14 · 30/09/2025 17:06

AngelicKaty · 30/09/2025 17:02

And presumably he's been living with his other parent until a year ago and has now moved in with his DF and his family that was already at full capacity, space-wise, before he arrived a year ago (for a reason OP hasn't explained). I think OP has been very reasonable allowing her DSS to move in and creating an over-crowded living situation - she shouldn't now be made to feel uncomfortable in her own home.

Yes, she could have said no and had him go into care or left him on the street... how very reasonable of her to do the bare minimum.

The attitude of some posters on here is actually depressing. I feel so sorry for this lad. He's now supposed to be GRATEFUL to his father for parenting and putting a roof over his head and GRATEFUL to his step mother for allowing it.

TwistedWonder · 30/09/2025 17:06

Rosscameasdoody · 30/09/2025 17:00

So what does OP do - they can’t magic up another room.

There’s been plenty of suggestions - the main one being the 5 and 10 year old could share a room, the baby go in with the parents and the DSS has the box room.

Or is the sofa is his bed, then have a cut off time where the living room is off limits so he has a private space.

Lighteningstrikes · 30/09/2025 17:07

Shock horror.
You’re being ridiculous if you think some 17 year olds don’t have sex. He’s above the age of consent.

He needs his own room. Could you convert the dining room, or have a structure put up in your garden for him.

Joeydoesntsharefood25 · 30/09/2025 17:07

Why did you and your husband have 3 kids when there was already a stepchild to accommodate. The poor kid should always have had his own room. If that meant you could only afford to have 1 kid yourself then so be it. Thats the choice you make when you marry a man that has a child already if you cant afford a larger house. I feel sorry for step son. Not having his own private space will make him feel he doesn't really belong. He needs privacy.

PeachyKoala · 30/09/2025 17:07

Anonomoso · 30/09/2025 17:05

Maybe he, and his girlfriend also don't eat any food OP may buy, watch TV, use the broadband, take a shower, wash his clothes or use any gas/electricity while they're there.

Are you not understanding that this is her step child? He's not some hobo relying on their benevolence. He's a child of the family and should be provided for as such.

Onlycoffee · 30/09/2025 17:07

I get he’s nearly grown up but surely in OUR family living room when the little ones could come down any time isn’t on?? @AutumnMum28

But it's not YOUR living room, is it, if it's also your dss's bed.

And where does he keep his things, and where does he study?

Why don't you swap with him then if it's YOURS so much.

And why are the little ones wandering around at night??

Rosscameasdoody · 30/09/2025 17:07

Onlycoffee · 30/09/2025 17:02

But what do you expect when he doesn't even have his own room?

I mean, as long as ds1 has his lego shrine, I guess that's more important than a sixth former having his own room for study and privacy,
Oh wait, no it's not.

Read the post again. It’s DS1’s bedroom. A three bedroom house. DS1 has one room - Lego themed - the other two children share and OP/DH have their room. What do you suggest, that OP throws a ten year old out of his own room to sleep on the sofa ? I think we need to know why DSS moved in to be honest because something isn’t right here.

TwistedWonder · 30/09/2025 17:08

Onlycoffee · 30/09/2025 17:02

But what do you expect when he doesn't even have his own room?

I mean, as long as ds1 has his lego shrine, I guess that's more important than a sixth former having his own room for study and privacy,
Oh wait, no it's not.

Yep. Think we can see who is the golden child and who is Cinderella in this family