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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:
greenpolkadot55 · 01/06/2026 08:30

PropertyD · 27/05/2026 19:16

Why do parents do this?? Selfish sods.

I had one turn up with other sibling and in front of them said she would appreciate if the uninvited sister could stay because she had another appointment to go to! As she left without me answering she said the sibling would not expect a party bag (she didn’t tell this sibling and because this child was 2 years older then everyone else there she was in the front row with her hands out!)

Did you give her a party bag ?

Holidaymodeon · 10/06/2026 10:38

How did it go op? I have much older kids but I honestly don’t recall anyone trying it on like that. I remember when parents had to accompany their kids when really young, often they also bring a baby etc but it wasn’t an issue because they just stayed in charge of the extra kids and later on when it was more expensive events parents would just drop and run but only invited kids. The ones who really annoyed me were the ones who rsvpd so I paid for them then the kids were a no show with no warning, then I’d try to round up last minute extras which might include near in age siblings if they already got on with my kids

deeahgwitch · 05/07/2026 09:07

How did the party pan out @ThePetiteMermaid ?

FatEndoftheWedge · 05/07/2026 09:16

We had this a few times except the older siblings just turned up to a bloody house party and took over and won all the games and we had an entertainer so again the older children answered everything she did or said !
I was furious !! So rude ! In a huge hall with 30 kids maybe a few more doesn't matter but this was an intimate house party !!

Coco1379 · 24/07/2026 16:37

So if the mum could not look after one child at the time of the party what would she do if neither child is invited?

Maddy70 · 24/07/2026 16:39

Just reply saying. Unfortunately siblings will not be able to be accommodated. Thanks for your understanding

Eightfor15 · 24/07/2026 22:12

Maddy70 · 24/07/2026 16:39

Just reply saying. Unfortunately siblings will not be able to be accommodated. Thanks for your understanding

Considering the party was in May, sending that message would be exceedingly weird.

deeahgwitch · 26/07/2026 08:59

What happened?
You said you’d update us @ThePetiteMermaid
Hope your sister recovered well.

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