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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

AIBU to let my adult nephew move in after rent rise from my sister?

677 replies

YearsOfLife · 18/09/2026 08:38

My nephew is 24 and has been working full time for about a year after finishing university. When he first started working full time, my sister was charging him £500 per month to live with her and her partner. She has now told him he needs to pay £800 per month which he isn’t happy about as he is trying to save for a house deposit as well as having other costs and wanting to socialise. He spends a lot of time at work or with his girlfriend and friends so I do think £800 is a lot.

Our children are similar ages and my nephew has asked if he could live with us, paying £400 per month. We are happy for him to live here but it is causing a huge problem with my sister and her partner. They don’t think we should allow him to stay with us.

On the one hand I can see why my sister thinks we shouldn’t get involved, but on the other, he’s our nephew and an adult and if we’re happy for him to live here, he should be able to.

My sister has accused us of trying to make money from him which is untrue as we don’t charge our own children anything to live here and IF we take anything from our nephew, it won’t be £400 per month. This isn’t about money for us. I agree with my nephew that £800 is too much and want him to be able to have a life and save like my own children.

AIBU to say he can live here?

OP posts:
FancyBiscuitsLevel · 19/09/2026 16:15

YearsOfLife · 19/09/2026 14:41

And he is living with other young people, my own children who are a similar age!

But they are all living as children of the family, living in your home, not being responsible for the bills or running the household, living by your house rules, not deciding them as equal adults. This is not the same at all to being responsible for a household, sharing the bills, deciding the house rules between them.

Pollymollydolly · 19/09/2026 15:44

Cherrytree86 · 19/09/2026 14:15

Why can’t he live in a house share with other young professionals?

he can still save then

he doesn’t need to live with family

Because the option of living with family is available to him, it sounds like he gets on well with his aunt, uncle and cousins, he’ll be paying less than market rent and will be able to save towards a deposit more quickly. Why shouldn’t he live with family?

InterIgnis · 19/09/2026 14:54

Cherrytree86 · 19/09/2026 14:29

@YearsOfLife

he can live in a house share and still do some saving bonus is he gets to live with other young people and you don’t compromise your relationship with your sister - win, win all round

Well no, because OP and her family are perfectly happy to have him at their house. His mother isn’t happy about it, but so what? That’s her problem.

josa · 19/09/2026 14:54

I think you are doing the right thing by bringing him to live with you. I do not understand why your sister wants to charge him so much when she is on a good wage too. I wonder if her partner is behind this. Either way he sounds like a decent young man & living with you he can save & eventually buy his own property. I hope the move goes well & he settles in nicely with your family.

YearsOfLife · 19/09/2026 14:41

Cherrytree86 · 19/09/2026 14:29

@YearsOfLife

he can live in a house share and still do some saving bonus is he gets to live with other young people and you don’t compromise your relationship with your sister - win, win all round

And he is living with other young people, my own children who are a similar age!

OP posts:
YearsOfLife · 19/09/2026 14:34

Cherrytree86 · 19/09/2026 14:29

@YearsOfLife

he can live in a house share and still do some saving bonus is he gets to live with other young people and you don’t compromise your relationship with your sister - win, win all round

He wants to live with us. He can save more and have family around. Friends are always welcome here so he can have it all. I’m not going to worry about my sister when she’s behaved how she has towards her own son. If you don’t understand that, I can’t help you.

OP posts:
Cherrytree86 · 19/09/2026 14:29

Cherrytree86 · 19/09/2026 14:15

Why can’t he live in a house share with other young professionals?

he can still save then

he doesn’t need to live with family

@YearsOfLife

he can live in a house share and still do some saving bonus is he gets to live with other young people and you don’t compromise your relationship with your sister - win, win all round

Cherrytree86 · 19/09/2026 14:27

walrushurricane · 19/09/2026 14:22

He won't be able to save as much for a deposit.

@walrushurricane

maybe not quite as much but he can still save

YearsOfLife · 19/09/2026 14:27

Cherrytree86 · 19/09/2026 14:15

Why can’t he live in a house share with other young professionals?

he can still save then

he doesn’t need to live with family

He could do that.

He can save more each month if he lives with us.

He doesn’t need to live with family but wants to. We are very happy to have him here.

OP posts:
walrushurricane · 19/09/2026 14:22

Cherrytree86 · 19/09/2026 14:15

Why can’t he live in a house share with other young professionals?

he can still save then

he doesn’t need to live with family

He won't be able to save as much for a deposit.

Brideofclover · 19/09/2026 14:19

YearsOfLife · 19/09/2026 09:56

You sound like you want that to be the case. I believe what my nephew has told me and my sister has had the opportunity to tell me if his account isn’t accurate. From what she has said over the last few weeks when all of this has been happening, her story matches what he has said. She was quite nasty to me yesterday so I’m sure she’d have said anything bad if there was anything to tell.

My nephew already spends time at our house as he and my children are friends as well as cousins and have a number of friends in common. I know him well and my children would also tell me if they had seen any behaviours from him that concerned them. They haven’t.

As much as you and some posters seem to want there to be some big secret, sometimes parents behave badly. My own parents did.

I was going to post saying if he wants to move in with you and you’re happy then go ahead - it seems your sister has some sort of problem and is pushing him away!
After your latest update I’m glad he has you and your family and I hope things settle for him over the next while x

Cherrytree86 · 19/09/2026 14:15

Why can’t he live in a house share with other young professionals?

he can still save then

he doesn’t need to live with family

Needingarest · 19/09/2026 14:06

walrushurricane · 19/09/2026 14:04

She isn't just asking for compensation for cost though. She wants more than that and clearly hopes to profit from him being there. If it was that inconvenient she would be happy for him to move out.

Yes I agree, as I said she’s wrong for not being happy for him to have found something that will work out better for him

Needingarest · 19/09/2026 14:05

rainingsnoring · 19/09/2026 13:46

What entitlement towards parents is that?

Expecting them to sub or majorly inconvenience themselves for adult children, obvious exceptions apply e.g your adult DC gets disabled in an accident or their spouse dies etc then I would hope most parents would absolutely be there for their adult children

walrushurricane · 19/09/2026 14:04

Needingarest · 19/09/2026 13:36

She’s unreasonable to create a rift out with her son and sister just because he’s found a better deal, absolutely, and sounds like the sort of person who would have resented him for moving in with a partner if that had been the case. However on the other hand he’s an adult, why on earth shouldn’t she be compensated for the cost and inconvenience of having him still living with her. Personally we have my adult DC living with us and don’t charge any rent ( only a small contribution towards bills) they’re no trouble at all and saving toward a house deposit, I don’t mind at all and they are happy to help us out anytime whenever we need never asking for anything in return. Obviously be nice when we have the extra room again but happy to be helping. However I don’t think this should be the expectation on all parents, there’s enough of a sense of entitlement towards parents as there is

Edited

She isn't just asking for compensation for cost though. She wants more than that and clearly hopes to profit from him being there. If it was that inconvenient she would be happy for him to move out.

QueenOfHiraeth · 19/09/2026 14:04

Can I suggest OP that you don't reduce the £400 that has been discussed as going lower would be like a red rag to a bull for your sister. If you'd like to charge less, put the excess into a savings account and give it to him when he is eventually going to move out. We did this with all of ours and it went down very well

TheFormerMrsTruelove · 19/09/2026 14:02

I was initially going to ask whether your sister and her partner were in receipt of Housing Benefit. I remember having to pay rent directly to the Council and full Council Tax, and keep to my mum when I first started working because she got housing benefit but I wasn’t entitled to that, so a huge portion of my wages vanished straight away, but having seen your post on their salaries, clearly not!

I think you’ve got an opportunity to give your nephew a real leg up here, and it’s lovely that you’re able to do that for him. I think he’ll remember your kindness for a long time. I suspect your sister and her partner are looking at it that if he’s going to be living there, he can pay a third of the bills. Technically fair, but not helpful.

Hurryuphumphreygeorgeiswaiting · 19/09/2026 13:52

Your Nephew will be able to save for a house deposit quicker living with you then his own mum. You are a kind aunt and a supportive one. He is lucky to have you looking out for him. I dont understand why your dsis is the way she is with your Nephew. He works hard, helps out and he just wants to save to get on the housing market. You would think she would help him in anyway she can and not make things harder for him.

Growing up i never had any support with my own parents but learnt how to stand on my own two feet at a young age. It was hard as I needed guidance but I got there in the end. I dont want my dc's to feel like i did.
I see things so differently with my own dc's and I am supportive with them all. Even with them growing up, they need guidance, support whether it is emotional or financial. I hope the move goes smoothly today.

Eddielizzard · 19/09/2026 13:47

I think your DSis doesn't like being shown up by you, and instead of backing down is doubling down

rainingsnoring · 19/09/2026 13:46

Needingarest · 19/09/2026 13:36

She’s unreasonable to create a rift out with her son and sister just because he’s found a better deal, absolutely, and sounds like the sort of person who would have resented him for moving in with a partner if that had been the case. However on the other hand he’s an adult, why on earth shouldn’t she be compensated for the cost and inconvenience of having him still living with her. Personally we have my adult DC living with us and don’t charge any rent ( only a small contribution towards bills) they’re no trouble at all and saving toward a house deposit, I don’t mind at all and they are happy to help us out anytime whenever we need never asking for anything in return. Obviously be nice when we have the extra room again but happy to be helping. However I don’t think this should be the expectation on all parents, there’s enough of a sense of entitlement towards parents as there is

Edited

What entitlement towards parents is that?

Gassylady · 19/09/2026 13:45

@YearsOfLife well done to you and your husband. Your nephew is earning well for someone not long finished uni that doesn’t mean its not crazy that his own mum wants to take more than his salary increase off him. Even more strange when she and her partner earn well.

I hope he soon settles in with you and his cousins. I wonder if some debt/financial worries will become clearer with your sister.

Needingarest · 19/09/2026 13:36

walrushurricane · 19/09/2026 13:24

She is unreasonable to try and make a profit out of her own son.

She’s unreasonable to create a rift out with her son and sister just because he’s found a better deal, absolutely, and sounds like the sort of person who would have resented him for moving in with a partner if that had been the case. However on the other hand he’s an adult, why on earth shouldn’t she be compensated for the cost and inconvenience of having him still living with her. Personally we have my adult DC living with us and don’t charge any rent ( only a small contribution towards bills) they’re no trouble at all and saving toward a house deposit, I don’t mind at all and they are happy to help us out anytime whenever we need never asking for anything in return. Obviously be nice when we have the extra room again but happy to be helping. However I don’t think this should be the expectation on all parents, there’s enough of a sense of entitlement towards parents as there is

ElfAndSafetyBored · 19/09/2026 13:34

YearsOfLife · 19/09/2026 09:46

Our nephew stayed here last night and is moving in with us properly today. I tried to talk to my sister yesterday but she didn’t want to discuss it, then when my nephew got home from work yesterday, she said he could pay £750 per month but he no. She told him if he is leaving then she wants him out by the end of the weekend and she wants everything gone. He came with a car full of stuff last night and my husband is going to help him to get the rest this morning as she wants him to take everything. I think she is doing it all wrong but I’m staying quiet as it’s his mum. I feel so sad for him, this isn’t right.

I think you’ve done the right thing. You and your husband sound lovely. I’d do that for my nephews too if they wanted it.

I can’t imagine being on over £100K and wanting to make my child’s life harder. It would be different if he were a layabout but it doesn’t sound like he is. Why wouldn’t you help someone get a good start in life if you can afford to?

walrushurricane · 19/09/2026 13:24

Needingarest · 19/09/2026 13:17

Your sister is not being unreasonable charging that level of rent and you’re wrong to have the view that she should be subsidising him now he’s an adult. However at the same time he’s an adult and entitled to chose to live where he likes, your sister should be glad he’s able to get a better deal at yours, she can get a lodger if she really needs the money

She is unreasonable to try and make a profit out of her own son.

Needingarest · 19/09/2026 13:17

Your sister is not being unreasonable charging that level of rent and you’re wrong to have the view that she should be subsidising him now he’s an adult. However at the same time he’s an adult and entitled to chose to live where he likes, your sister should be glad he’s able to get a better deal at yours, she can get a lodger if she really needs the money