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How can I turn down uninvited siblings politely from nieces 9th birthday party?

383 replies

ThePetiteMermaid · 25/05/2026 13:29

I changed my user name for this and some details as it’s pretty outing (and a long post sorry - trying not to drip feed) but I need advice please.

My niece has a birthday party coming up this week and my Dsis was originally going to book a party package doing an activity with food and party bags included.
It worked out as far too expensive for her as a package because you need a minimum amount of guests to book and so she decided to take a smaller friend group and pay for them to do the activity individually and then to take them to a fast food place to eat.
She also decided instead of party bags to just do cake to save money and thought the kids might not expect one after an expensive activity and might be too old to be bothered anyway at 9 years old.

My Dsis became ill unexpectedly and had to have an operation which means she’s unable to host the party and her DH is at work so she asked me to do it.
I didn’t want my niece disappointed so have taken over the WhatsApp group to finalise things and I have a friend to help on the day.

I have had two messages from two mums basically saying siblings need to attend as it’s school holidays and not really asking but telling me. There hasn’t been any money offered but one mum put “Lucy isn’t expecting a party bag but I’m hoping you will be able to provide a meal for her”.

The other mums message was a bit more polite saying “Katy can’t come without her sister Jess as I have no one to look after Jess, I hope this isn’t an issue as Katy is really excited about coming to celebrate Amy’s birthday”.

I can’t believe how rude and cheeky this is, surely they aren’t expecting my Dsis to pay for the extra kids?
Even if the parents do offer to pay I don’t want to be responsible for two extra kids who will probably be a different age category anyway.

I want to reply saying that the party numbers are final and we can’t stretch to additional guests financially and also I don’t think two is enough people to safeguard extra children.
I wasn’t sure if I should include the financial part as they might have been expecting to pay for the siblings on arrival.

I was hoping for some help please in writing a response that is polite but firm, my Dsis said one of the mums will possibly try to drop the sibling off anyway as she has form for this.

I don’t have children so feel uncomfortable dealing with this and I was really surprised to hear it’s a common request, I can understand if it was a cheaper venue like a hall party when the kids were younger but not for an expensive activity!

I’m also wondering what to say to kids if they are expecting party bags. With one mum mentioning them in the text I’m thinking others might expect them and kids might ask for one. I don’t have the money or time to provide them and wouldn’t have a clue what to put in them, I don’t want to stress my Dsis when she’s ill and already fretting about pleaving me in charge, surely a slice of cake is enough?!

It would be helpful if someone could also give me a suggestion of what to say if someone does attempt to drop off a sibling please.

I’m ND and not the best with confrontation or awkward conversations and I’m really pissed off I’ve been put in this position and my niece will be really upset if the two girls can’t attend because we can’t include siblings although that maybe can’t be helped.
I wouldn’t have been as keen to volunteer to help if if known I’d be dealing with these cheeky requests and worrying about bloody party bags!

I’ve posted quickly but I have to go out now so I won’t be able to respond much until later.
I just thought I’d better add this in anticipation of people asking “where has the OP gone!”
I will update after I’ve hopefully handled the situation tactfully!

OP posts:
Gossipisgood · 27/05/2026 12:14

Dear Parents. Final numbers for Amys party have been given to the venue & full payment for invitees has been made already therefore if you wish to take siblings you will have to book them in on the day & pay for them yourselves. We will be going for Mc Ds afterwards which you're more than welcome to bring siblings to at your expense. Many thanks for your understanding. Looking forward to seeing you.

HelenaWilson · 27/05/2026 11:32

I’d much rather have little plastic toys that keep my kids happy for a short time than more sugar

Why does it have to be one or the other? Fancy notebook or colouring book, pens or pencils....

One of mine had a birthday just after Christmas but still in the school holidays so their party was often a big get together for mums to chat about what we'd been up to.

So it wasn't a party for your child at all?

Not everyone has a house big enough to host more than around six guests, and as pp have said, once you start adding children of different ages, the games don't work.

TheignT · 27/05/2026 11:18

ThePetiteMermaid · 26/05/2026 00:38

I’ve read through the replies and there have been some great suggestions so I’ve combined a few and decided to go for this and put it in the group chat:

“Thank you for everyone who has RSVP’d for Amy’s party, she is looking forward to seeing everyone and drop off time is at 11.30 with pick up time to be confirmed.

I’m very sorry to those who have asked but unfortunately we cannot accommodate siblings as we had only budgeted for the invited children, I don’t feel comfortable supervising extra children and Amy would prefer just to have the friends she has invited.
I’m sorry if that inconveniences anyone, if you do wish to bring any siblings then you can pay for their entry separately but will need to stay to supervise them, they cannot be left with the party group and if you want to join us afterwards at KFC the same applies.

If anyone is struggling for transport just let me know because we might be able to help.
Thank you for making Amy’s day special”

I’m not sure if it’s a bit waffley but after some of the horror stories people have posted I wanted to make it crystal clear that we won’t be looking after any extra siblings who are just left to join the party and I wanted to make extra sure people know it’s fine to drop off!

I think it’s a good idea to post in the chat as based on others experiences I might get people who don’t bother to even ask and will just bring siblings and leave them.
I wish I had the balls to do what a pp posted and just leave any uninvited kids in reception but I don’t think my Dsis would be happy at me ruining her reputation!

I can see some people feel strongly about party bags and think it’s an important part of the party and will provide “core memories” but I’d hope that the party will be more exciting then a bag of tat and will provide some wonderful memories!
Maybe it’s because I don’t have kids and I don’t remember being that excited about party bags when I was one but it just seems like more faff and expense I’ll get some little bags of haribo as suggested and stick them in with the cake that will of course be wrapped in a napkin and inevitably end up getting sat on, squashed or just the icing picked off because that’s my most common childhood memory of the end of parties 😂.

I am going to sound really old now but when did this change where it became so common to bring siblings to parties? I don’t remember any coming to any birthday parties I went to as a child in the 90’s.

It’s been a long day so I’m going to bed and will post tomorrow and update if I need any more help and advice, I have a feeling my message might cause some controversy.

It was common when mine were in primary school in the 90s but parties tended to be at home with some games and home made food. I always catered for extras and siblings were welcome but didn't get a party bag. One of mine had a birthday just after Christmas but still in the school holidays so their party was often a big get together for mums to chat about what we'd been up to.

I guess it didn't worry anyone as we all did it. If you fancied an afternoon without invited child drops them off, if you fancy a catch up come along. Also the costs were lower.

Silverbirchleaf · 27/05/2026 11:12

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Op can spend her money how she wants. IIf she wants a professional cake and ten party guests, that’s up to her. It’s not up to another mum, or for you to spend op’s money having more guests.

Also, op will have thought about the dynamics of the group, and having a younger or older sibling can change this

GertrudePerkinsPaperyThing · 27/05/2026 11:07

Sorry I can see you have dealt with it now!

GertrudePerkinsPaperyThing · 27/05/2026 11:01

Sausagesmyarse · 25/05/2026 13:35

“I am very sorry but we cannot accommodate siblings. The party venue and food has been booked for a certain number of children.

If you wish to bring older sibling, you can pay for their entry and food separately and you will need to stay to supervise them, they cannot be left with the party group.”

I’ve had the same so many times!!

Edited

I would also say something like this. This gives them a total answer their supposed problem but makes it clear you would be providing the space or paying.

You could say add- “Alternatively, you are very welcome to drop off [invited child’s name] leaving you free to take sibling elsewhere, but we don’t have a space for sibling nor can they be dropped off”

Morecoffeewanted · 27/05/2026 10:53

Does the "can the siblings come as well' come from families who either can't afford to go there as a large family group or who are simply unable or unwilling to arrange days out for their own children.

The pressure from the univited children would be so hard as they are not going anywhere at all. No one can either bother to or afford to entertain them at a day out.

My SIL arranged a wonderful treat for some joint birthdays in our own family. Bit of an adventure.

Requests came from friends of the children who wanted to go. It needed waivers and adult supervision though so she said no.

None of the extra children who wanted to go have ever invited ours to anything similar or ever been to anything like this.

My SIL is wonderful at organising cheap days out for the children and very happy to take cousins. The disabled ones are included including one needing a lot of care.

We were reminded of another extended part of the family who rarely go anywhere and the father has never even taken his son fishing. They rarely go anywhere and buy things instead. They don't seem to value experiences as a family.

Larrythecatforpm · 27/05/2026 10:52

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Sure the kid would prefer a good decent cake than random kids at their party.

OVienna · 27/05/2026 10:51

jinglejanglescarecat · 27/05/2026 09:01

I don’t think she’s at all worried.

they don’t want party bags.

I haven’t read all the posts but noticed OP said some posters had mentioned party bags in the same line as “core memories” 😂. Some people really are hilarious around parties.

it’s a free few hours for the guests doing something fun with friends. The expectations and craziness from some people is just mad. Making extra cakes too?!

The 'core memories' and party bags is batshit.

Also agreed on the making of an extra cake - for goodness sake what are people on?!

B1anche · 27/05/2026 10:48

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What exactly is your point here? OP's sister has a budget for the party. The budget has been allocated to various costs including cake. Are you suggesting that she should cancel the cake to fund party bags and unwanted siblings?

savoycabbage · 27/05/2026 10:39

Trainup · 27/05/2026 10:01

I’d much rather have little plastic toys that keep my kids happy for a short time than more sugar

You should definitely do that then, at your own child’s party.

Trainup · 27/05/2026 10:01

EdithBond · 27/05/2026 09:16

Perfect message IMHO. Well done @ThePetiteMermaid.

Party bags aren’t necessary, especially if filled with plastic tat that clutters up the house and is then thrown in landfill. If you really want to provide them, fill with little boxes of raisins and sweets.

I’d much rather have little plastic toys that keep my kids happy for a short time than more sugar

Trainup · 27/05/2026 10:00

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EdithBond · 27/05/2026 09:16

Perfect message IMHO. Well done @ThePetiteMermaid.

Party bags aren’t necessary, especially if filled with plastic tat that clutters up the house and is then thrown in landfill. If you really want to provide them, fill with little boxes of raisins and sweets.

Delphiniumandlupins · 27/05/2026 09:10

My granddaughter recently went to a birthday party at an Inflatanation and we had to fill in a kind of permission form for her. Actually told to arrive 20 minutes before party time to do so. Your trampoline place may be different but we definitely couldn't have snuck in uninvited/unpaid kids.

Mangochutney33 · 27/05/2026 09:03

NeedANewOne25 · 27/05/2026 07:50

Plenty of UK full time employees don’t get 28 days leave!

Then their employers are breaking the law

jinglejanglescarecat · 27/05/2026 09:02

Parentingisharder · 27/05/2026 08:30

In the 90s where I lived it was no big deal to bring siblings- and they often came. Because it was a party at home and the more the merrier and there was no expensive cake. And this created a sense of community as we were all in it together. There wasn’t such a strict sense of “you only play with people your own age” and in the long run I became friends with my friends little sister.

But this isn’t that sort of party though.

not all kids what other people at their party. What if they don’t like the siblings. Great if they do but sometimes the siblings can be harder work and ruin parties.

Awfulinlaws · 27/05/2026 09:01

It is so rude and not fair in the birthday child as often there are age gaps (even a few years is significant for kids).

jinglejanglescarecat · 27/05/2026 09:01

Clarefromwork · 26/05/2026 22:23

My dd went to a party where they didn’t have party bags at the end, it wasn’t planned but the mum of the party kid had got loads of helium balloons and ended up giving each kid one on the way out and they all loved it. Could that be an option if there are only 5 (get 5 of the same balloon chosen by your niece) as card factory sell quite cheap ones

Only if you are worried about not having party bags of course! You could tie it round a piece of cake if they are going in a box !

I don’t think she’s at all worried.

they don’t want party bags.

I haven’t read all the posts but noticed OP said some posters had mentioned party bags in the same line as “core memories” 😂. Some people really are hilarious around parties.

it’s a free few hours for the guests doing something fun with friends. The expectations and craziness from some people is just mad. Making extra cakes too?!

pimplebum · 27/05/2026 08:56

If there was no party this week they would still have child care arrangements in place.

so hslf term is no excuse to bring siblings they just want a child free few hours

surely if you explain their friend is in hospital/ operation you are standing in so 9 yr old still gets a birthday insist cheeky mum have to stay and help

id like to think you have had offers of help already in the circumstances ??

Parentingisharder · 27/05/2026 08:30

In the 90s where I lived it was no big deal to bring siblings- and they often came. Because it was a party at home and the more the merrier and there was no expensive cake. And this created a sense of community as we were all in it together. There wasn’t such a strict sense of “you only play with people your own age” and in the long run I became friends with my friends little sister.

Rpop · 27/05/2026 08:20

Sausagesmyarse · 25/05/2026 13:35

“I am very sorry but we cannot accommodate siblings. The party venue and food has been booked for a certain number of children.

If you wish to bring older sibling, you can pay for their entry and food separately and you will need to stay to supervise them, they cannot be left with the party group.”

I’ve had the same so many times!!

Edited

This. And you could just send it as a generic message on the WhatsApp saying “we’ve had quite a few requests for siblings to come, but….

Candy24 · 27/05/2026 08:09

wow some mums are so rude. Say no

Ricecakes101 · 27/05/2026 07:59

Cf parents are the worst part of parenting.

That and the performative nonsense of things like massive party bags - just so unnecessary

MrsBennetsPoorNervesAreBack · 27/05/2026 07:57

NeedANewOne25 · 27/05/2026 07:50

Plenty of UK full time employees don’t get 28 days leave!

Well, their employers are breaking the law if they don't, as 28 days is the statutory minimum. It does include bank holidays though.