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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

DP’s son moving in

936 replies

maximusss · 23/01/2026 07:42

I suspect I’m being unreasonable here but I thought it would be helpful to get other people’s opinions.

My DP has a DS19, sees him usually once a week when he comes to stay.

We’re due to exchange on a house next week and last night DP dropped in to conversation over dinner that his DS will be moving in full time when we are in the new house.

Now I know this is his son, and I like him, but AIBU to think there should have been slightly more discussion on this? I worry about what else he will drop on me without notice or discussion further down the line. Maybe it’s me being dramatic, it’s just made me feel a little uneasy for some reason.

OP posts:
LAMPS1 · 23/01/2026 15:35

maximusss · 23/01/2026 07:51

I think it’s more because I feel I’m being unreasonable to say no - it’s his son after all!

He’s banking on you feeling that way OP!
Otherwise, he would have discussed it long ago, before you got to this late stage with the house purchase.

You really must be honest (as well as more assertive) with yourself now and decide if this underhand, dishonest conduct is what you want to lumber yourself with. It is definitely the sort of thing that would break any normal person’s trust in their partner if they pulled a fast one like this.

It’s not about the young man coming to live with you, it’s about your partner’s massive assumption without discussion, - as well as his trickery.

Remember, you have time to pull out. This is exactly what this time period is for.
So don’t feel badly about if you decide that’s the best thing. I wouldn’t blame you at all.

How would he feel if you suddenly said, without any previous discussion, ….. oh my the way, my sister/new dog/adult daughter is coming to live with us as soon as we move in.

Soontobesingles · 23/01/2026 15:35

NoisyViewer · 23/01/2026 15:29

Yes they’re both his parents, but even if they weren’t it doesn’t mean the parent is any less a parent because they have a partner.

the woman has a child the same age at uni, whom I suspect will at some point be looking at moving home even if they’re planning on travelling in the summer. Would that be assumed they’d be moving in with her. How would Mumsnet react if this situation was him kicking off because her child was moving back from uni, it’s unlikely they’ll be in a position to rent or buy something when uni ends. The husband has mentioned his son will have x bedroom, not the spare room so I think it’s safe to say they have the space, do you think she hasn’t earmarked a room for her own child to stay in? How much discussion has been had about that, or has it always been assumed her child will someday return. To ask permission to have your own child live with you just wouldn’t be option for me. I’d sit her down & say my son wants to live with me & I’ve said yes. I get this maybe a shock but I understand if you want to pull out the house and keep things as they are. If she was to do that, then I’d never move in with her. There would never be a situation where I’d allow my child less rights to my home than that of my partners kids. She’s already said he wouldn’t have a problem if the situation was reversed. Not saying she should love it but she should respect it & if she can’t then she has some big decisions to make & luckily it’s came at a time where she has more freedom to make it. If this has happened a year from now she’d be stuck.

Edited

OP’s partner’s son is 19, not 10. It’s a bit different having a relationship with a parent of adults than one of young kids and a reasonable expectation that you will not have to house an adult (without being consulted).

Millytante · 23/01/2026 15:38

maximusss · 23/01/2026 07:42

I suspect I’m being unreasonable here but I thought it would be helpful to get other people’s opinions.

My DP has a DS19, sees him usually once a week when he comes to stay.

We’re due to exchange on a house next week and last night DP dropped in to conversation over dinner that his DS will be moving in full time when we are in the new house.

Now I know this is his son, and I like him, but AIBU to think there should have been slightly more discussion on this? I worry about what else he will drop on me without notice or discussion further down the line. Maybe it’s me being dramatic, it’s just made me feel a little uneasy for some reason.

Feeling ‘a little’ uneasy is surely an understatement!
In your place, by now I’d have alerted the solicitor that I was pulling out of the purchase, and that she’d hear from DP asap. I’d have texted ditto to DP in the meantime.
When he phones tonight, as surely he will, I’d be telling him I’m staying put, and remaing in my own house, while he and his son live wherever they land.

If his son is moving in because he cant tolerate his mother’s remonstrating with him, you can be sure whatever caused it would recur in the house you'd be sharing with your DP, and that DP wouldn't deal with it himself at all. (DS having ascertained this from long experience)
It’d be left up to you to give out about mess, noise, stench of weed, possession of weed in your house, girlfriend as good as living there….Christ who needs any of that, and all the less when its been taken for granted that you’ll take it on as your job.
You anticipated living with DP as just that, and he has upskuttled it all with his very last minute announcement.
(I hope the timing is mere happenstance, and that DP isnt dark enough to have planned for the bomb to drop when you'd think it too late to object)

To me, it’s all a good reason to leave the relationship, as it is following the usual grim script to the letter, sadly. A man exploits his partner’s good nature and what is more, expects it as his due, woman to man.
Fuck that for a game of soldiers.

I’m furious at all this and I don't know either of you, and I certainly hope your slight unease has turned into righteous anger.

FateAmenableToChange · 23/01/2026 15:39

Interesting that people are saying there should have been more discussion, a lot of discussion etc.
The real issue here is not that there was not enough discussion - he did not discuss this with her, he told her. She was informed what would be happening.

That is frankly terrifying to me. Handing over your home and security to someone who has so little respect for you that they simply give you orders and expect you to take it. Thats a prison sentence.

I would be gone.

Millytante · 23/01/2026 15:39

LAMPS1 · 23/01/2026 15:35

He’s banking on you feeling that way OP!
Otherwise, he would have discussed it long ago, before you got to this late stage with the house purchase.

You really must be honest (as well as more assertive) with yourself now and decide if this underhand, dishonest conduct is what you want to lumber yourself with. It is definitely the sort of thing that would break any normal person’s trust in their partner if they pulled a fast one like this.

It’s not about the young man coming to live with you, it’s about your partner’s massive assumption without discussion, - as well as his trickery.

Remember, you have time to pull out. This is exactly what this time period is for.
So don’t feel badly about if you decide that’s the best thing. I wouldn’t blame you at all.

How would he feel if you suddenly said, without any previous discussion, ….. oh my the way, my sister/new dog/adult daughter is coming to live with us as soon as we move in.

Spot on, in every way

Millytante · 23/01/2026 15:39

FateAmenableToChange · 23/01/2026 15:39

Interesting that people are saying there should have been more discussion, a lot of discussion etc.
The real issue here is not that there was not enough discussion - he did not discuss this with her, he told her. She was informed what would be happening.

That is frankly terrifying to me. Handing over your home and security to someone who has so little respect for you that they simply give you orders and expect you to take it. Thats a prison sentence.

I would be gone.

Me too.

Duveet · 23/01/2026 15:41

There is a reason some women end up in abusive shit shows, and often it is hesitation like this.

Not listening to their gut, feeling uneasy, but still going ahead.

He thinks she won't have the guts nor intelligence nor self preservation to back out.

He is a prick, you just never saw it.

blueshoes · 23/01/2026 15:43

Soontobesingles · 23/01/2026 15:35

OP’s partner’s son is 19, not 10. It’s a bit different having a relationship with a parent of adults than one of young kids and a reasonable expectation that you will not have to house an adult (without being consulted).

Agree.

An adult male no less. I personally would feel viscerally uneasy and even physically unsafe in my own home with two adult males that could gang up against me.

I would never accept that arrangement as a lone female. My house is my refuge.

Better for OP to live separately and then with her dd down the road.

Pull Out Now.

Aplstrudl · 23/01/2026 15:46

How many bedrooms does the new place have?

NoisyViewer · 23/01/2026 15:46

HomeTheatreSystem · 23/01/2026 15:30

Only 19? He can vote and get married so an adult, albeit a young one. He has somewhere to live: he is not homeless. He doesn't like his current situation because he wants to live like a pig in his mum's house even though he is old enough to know better. He thinks he will be able to live like a pig in his dad's new house and no one will mind.

His father, if he were half decent, would tell him that he is to start showing his mother and their home a bit of respect, that until there's no more noise about his messy habits and disrespectful ways he will consult his partner and together they will consider whether he can live with them and under what rules.

He also works and can move into a house share where I'm pretty sure it won't take long before the other residents are up his arse about his slovenliness. So one way or another he needs to sort himself out. If no one is prepared to house him, he has only himself to blame.

Edited

He can put down house rules. What opinion of her kids do you have. They’re currently at uni, should they be told nope you can’t come back. You’re old enough to vote so I suggest use that wisely and get yourself married.

NoisyViewer · 23/01/2026 15:47

blueshoes · 23/01/2026 15:43

Agree.

An adult male no less. I personally would feel viscerally uneasy and even physically unsafe in my own home with two adult males that could gang up against me.

I would never accept that arrangement as a lone female. My house is my refuge.

Better for OP to live separately and then with her dd down the road.

Pull Out Now.

Wow, with that wild imagination I don’t think any man should be alone with you either,
god knows what they’d be accused of

FOJN · 23/01/2026 15:49

NoisyViewer · 23/01/2026 15:29

Yes they’re both his parents, but even if they weren’t it doesn’t mean the parent is any less a parent because they have a partner.

the woman has a child the same age at uni, whom I suspect will at some point be looking at moving home even if they’re planning on travelling in the summer. Would that be assumed they’d be moving in with her. How would Mumsnet react if this situation was him kicking off because her child was moving back from uni, it’s unlikely they’ll be in a position to rent or buy something when uni ends. The husband has mentioned his son will have x bedroom, not the spare room so I think it’s safe to say they have the space, do you think she hasn’t earmarked a room for her own child to stay in? How much discussion has been had about that, or has it always been assumed her child will someday return. To ask permission to have your own child live with you just wouldn’t be option for me. I’d sit her down & say my son wants to live with me & I’ve said yes. I get this maybe a shock but I understand if you want to pull out the house and keep things as they are. If she was to do that, then I’d never move in with her. There would never be a situation where I’d allow my child less rights to my home than that of my partners kids. She’s already said he wouldn’t have a problem if the situation was reversed. Not saying she should love it but she should respect it & if she can’t then she has some big decisions to make & luckily it’s came at a time where she has more freedom to make it. If this has happened a year from now she’d be stuck.

Edited

Wrong post quoted.

AttilaTheMeerkat · 23/01/2026 15:49

I hope you have pulled out of the exchange. He intending to move in his son with you both is a step too far. And he is messy with it and smokes weed. No on all counts here.

godmum56 · 23/01/2026 15:50

Jane143 · 23/01/2026 15:17

It’s his son and he’s only 19. Yes he should have discussed it with you but it would be unreasonable to say no

no it wouldn't. Its not the OP's son nor a child.

HonoraBridge · 23/01/2026 15:51

That is awful. Of course your DP should have discussed with you before any decision was made.

godmum56 · 23/01/2026 15:52

Soontobesingles · 23/01/2026 15:35

OP’s partner’s son is 19, not 10. It’s a bit different having a relationship with a parent of adults than one of young kids and a reasonable expectation that you will not have to house an adult (without being consulted).

This

Blondeshavemorefun · 23/01/2026 15:54

How long have you been together ?

uou don’t have to live together and if his son is going to live with dad they can stay in own current property

sittingonabeach · 23/01/2026 15:55

@godmum56 so the partner can say no to the OP's DD staying in the house when not at uni.

PeloMom · 23/01/2026 15:58

maximusss · 23/01/2026 07:51

I think it’s more because I feel I’m being unreasonable to say no - it’s his son after all!

It’s his son. But also it’s your life. Pull out now.

NoisyViewer · 23/01/2026 16:00

godmum56 · 23/01/2026 15:50

no it wouldn't. Its not the OP's son nor a child.

So he can block her child moving in also. They’re at uni at the point of moving in together. They’re also an adult and not the boyfriend’s child.

BertieWoostersChaps · 23/01/2026 16:04

How long have you been together?

This is a red flag. I'd be pulling out.

TBH you should have discussed this before committing to buying a house with him. With two DC who are technically adults but not yet independent, this was always going to be a possibility and one you should both have considered.

What if you agree to this and your DC then decided they want to move after uni? Will you have enough space? Will the two DC get on? Etc etc

Anyahyacinth · 23/01/2026 16:04

maximusss · 23/01/2026 10:18

He’s working and can’t really answer the phone. I’ve text him and asked him to call me on his lunch break. I just feel sick about the whole thing

Your DP is showing you he doesn’t regard you as an equal AND allowing his son to disrespect his mother - to leave rather than shape up. This is a big red flag for your future happiness

HomeTheatreSystem · 23/01/2026 16:06

NoisyViewer · 23/01/2026 15:46

He can put down house rules. What opinion of her kids do you have. They’re currently at uni, should they be told nope you can’t come back. You’re old enough to vote so I suggest use that wisely and get yourself married.

You are projecting here based on your own experiences when you were 10 and a child whose parents were obliged to house you and care for you. That your father was too feeble to do so was on him. You were not a disrespectful slovenly 19 year old earning a living and expecting free reign to live like a pig in his parent's house. Big difference.

BertieWoostersChaps · 23/01/2026 16:11

Jane143 · 23/01/2026 15:17

It’s his son and he’s only 19. Yes he should have discussed it with you but it would be unreasonable to say no

I think you're in the minority here...

Pessismistic · 23/01/2026 16:13

Sorry op but this is crap for you. I get he wants his son living with him but why did it not happen before this? I can tell you now your dynamic will change so much if he’s messy at home do you really think you’re getting a new version of him. It’s hard enough living with your own adult dc your dp should have asked first off then rent should be discussed and boundaries for him and his gf. I feel for you knowing dp never respected you enough to discuss this. I would hold off for now unless you really want to be with dp. But think of your future as a family of 3+1 possibly all the time.