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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

To cancel DD’s birthday party because I know her dad will ruin it?

263 replies

SynthWaveX · 25/09/2026 15:35

DD is turning 10 next Saturday and I’ve booked a little party for her which she has been excited about for weeks. There will be about 10 girls from her class and her cousin, so 11 children altogether. It’s only a 2 hour party at the local community hall, with a cheap entertainer, pizza and cake. DD picked the theme and has been very clear she wants it small and just her friends, no adults making a fuss.

The problem is it falls on her dads weekend. We’ve been separated about 4 years and he normally has the DC alternate weekends. I had already agreed I’d do the party and he could have DD afterwards and take her out for dinner, presents etc. I genuinely thought that was a reasonable arrangement. He does see her regularly and I’m not trying to stop him being part of her birthday, I just thought the actual party could be the thing I had organised.

A few days ago he asked if his parents could come. I said the hall is quite small and it’s a drop off party, so I didn’t think extra adults would work. Then he said his GF and her 2 children would be coming too. Her children are about 7 and 4. DD apparently got upset when he told her and later said to me she didn’t want them there because “it’s my party and I don’t know what I’m meant to do with them”. She just wants it to be her friends and cousin, which is what we had planned.

There have been a few similar things before. He does have a habit of making things into quite big family occasions. Last Christmas he brought extra relatives along to something I’d arranged without checking first, and at DS’s school event he turned up with several people which was a bit chaotic. I’m not saying he doesn’t love the children because he does, and DD loves seeing her grandparents too. I know they enjoy having her and I’m not trying to keep them away. It’s just that sometimes he seems to think every event has to include everyone.

He said his parents haven’t seen DD for a little while and were looking forward to her birthday, and that I was making him look bad in front of his family. I said they can see her, and that he can have her straight after the party and take her for dinner and cake and give her presents etc. He then said he is her dad and shouldn’t have to “book an appointment” to attend his own daughters birthday. I did get annoyed at that because I’m not stopping him seeing her, I’m saying he can’t just add 4 extra people to something that was planned as a small party.

The hall has a proper maximum capacity and I’ve already paid for it, the entertainer, food and the cake. It isn’t just me being fussy about having extra people there. If all the children come plus me and the adults he wants to bring it would be over the number we’re allowed. He says some of the children won’t take up seats anyway and I’m being ridiculous about it. I’ve told him he can come on his own if he wants to, but he says that’s not the point because his family should be there too.

DD has now started saying she doesn’t even want the party. She said she’d rather I cancel it and take her shopping and for lunch with me. I honestly feel sick about it because she was so excited before all this started. I know she is only 10 and obviously doesn’t understand all the adult stuff, but I hate that she is now upset about something that was meant to be for her. It feels like whatever I do I’m going to make it worse, and maybe I already have by arguing with her dad about it.

DP thinks I should just stop negotiating with him and have the party as planned, and if he doesn’t want to come then that’s his choice. My mum thinks cancelling would be unfair on DD because she shouldn’t lose her party just because her parents can’t agree. I haven’t told the other parents anything yet because I don’t want to start making a drama out of it when it might still be sorted. I’m also annoyed because I’ve saved for this and already paid for everything, so cancelling it feels ridiculous, but obviously that’s not more important than DD being happy.

I’m now thinking I should just tell him he isn’t invited if he is bringing everyone else, keep the party exactly as planned and let him have DD afterwards. But then I worry she’ll feel like I deliberately excluded her dad from her birthday. The other option is cancelling it all and doing something with her instead, which she is now saying she wants anyway. I know how this sounds and I might be completely unreasonable here, but am I actually the one who’s ruining her birthday now? AIBU to just say no to all the extra people and carry on with the party?

OP posts:
timemotionboredom · 25/09/2026 16:58

I hate to state the obvious but...

This is a children's party. School children and a cousin school child. You and your mum are the entertainment and catering coordinators, that is all. Not guests. Is your ex going to pay towards anything there, serve up food, entertain the kids (eww), clean up afterwards. Is he going to look after his GF's kids?

Why the fuck should he, his gf and grandparents be there. It's fucking creepy.

So what if it's "his weekend". You haven't done it this way to fuck him over. It's his DD's birthday on that day. The hall is only available on that day. Can't he put his desire for control and his pathetic pettiness aside for his child...FOR ONE TWO HOUR PERIOD OF ONE BLOODY DAY. What a fucking wanker.

I'm going to unashamedly shout this because I suspect the answer is no...

ARE YOU INVITED TO HIS BIRTHDAY DINNER AND HE IS PAYING YOUR BILL?

I very deeply suspect not.

Tell him he can fuck off unless you, your parents and your DP are invited to his birthday dinner out.

cartagenagina · 25/09/2026 16:58

Ooh! I like the idea of security!

Sartre · 25/09/2026 16:59

Your DD is old enough to talk to him about this herself which I’d recommend you facilitate. She needs to say that she just wants this party to be for her and her friends, not family. You’re only there to sort the food and make sure they’re all safe etc but you won’t be hanging out with them. If he’s a decent dad, he will listen to her.

Newyearawaits · 25/09/2026 16:59

It could be that OP has subconsciously raised this as an issue and child has picked up on that.
I fairness to her dad, he very much wants to be involved and his parents also. That seems fair and reasonable to me.
OP, did you discuss the party and date etc with her dad?

WeDid2 · 25/09/2026 16:59

honestly the extra adults are neither here or there they will be hanging out in a corner drinking tea

the other younger children is not great for the 10 year olds but the 10 year olds will likely just do their thing. If its anything I would put my foot down about the younger kids as they would change the dynamic and allow grandparents and girlfriend who will be bored

Newyearawaits · 25/09/2026 17:01

timemotionboredom · 25/09/2026 16:58

I hate to state the obvious but...

This is a children's party. School children and a cousin school child. You and your mum are the entertainment and catering coordinators, that is all. Not guests. Is your ex going to pay towards anything there, serve up food, entertain the kids (eww), clean up afterwards. Is he going to look after his GF's kids?

Why the fuck should he, his gf and grandparents be there. It's fucking creepy.

So what if it's "his weekend". You haven't done it this way to fuck him over. It's his DD's birthday on that day. The hall is only available on that day. Can't he put his desire for control and his pathetic pettiness aside for his child...FOR ONE TWO HOUR PERIOD OF ONE BLOODY DAY. What a fucking wanker.

I'm going to unashamedly shout this because I suspect the answer is no...

ARE YOU INVITED TO HIS BIRTHDAY DINNER AND HE IS PAYING YOUR BILL?

I very deeply suspect not.

Tell him he can fuck off unless you, your parents and your DP are invited to his birthday dinner out.

Missing the point entirely. It's his daughter's birthday party and all the people I know have had both parents at a birthday party, very much the norm.

DryadsRest · 25/09/2026 17:05

Yes but the mother checked beforehand that he was ok with her plans - he said he was fine, now hes waited to say hes changed his mind

LivingDeadGirlUK · 25/09/2026 17:07

I think the PP who said he wants to make it a big family event at OPs expense has hit the nail on the head. He's got her after the party, taking her out for dinner, but he wants to bring a load of extra people to the party OP has organised now as well.

alcovecupboards · 25/09/2026 17:08

You shouldn't have booked a party on his weekend. You're actually outrageous for that and if he had done it you would be getting very different responses. I don't see why you can't just avoid the drama and allow his parents to attend for your daughter?

DryadsRest · 25/09/2026 17:08

LivingDeadGirlUK · 25/09/2026 17:07

I think the PP who said he wants to make it a big family event at OPs expense has hit the nail on the head. He's got her after the party, taking her out for dinner, but he wants to bring a load of extra people to the party OP has organised now as well.

Agree he’s actually being incredibly rude - he just needed to say at the time he wanted to be there
op sounds really kind and accommodating
really rude to crash the party

WallaceinAnderland · 25/09/2026 17:09

No, I wouldn't cancel it and also I wouldn't act like it was a big deal in front of DD. I would say, oh it's fine, the more the merrier. She will be happy with her friends and doesn't need to pay any attention to the GF children, or any other adults there. It's 2 hours, it's all been arranged, it will be fun.

The adults will just have to stand around bored or wait outside if there's not enough room for them but that's their problem.

seahorsessky · 25/09/2026 17:09

I'd say no to the girlfriend's kids, if he was the one who broke up your family with her-why should your kid be expected to spend time with her (obviously not blaming the kids). But his parents, well they're not going to be running round the hall so won't take up much room, and unless they encouraged their son to be a cheat, it's not their fault what's happened, and it's worth doing everything to preserve a relationship for their and your kid's sake-if he didn't care enough about you and your daughter not to cheat and leave a new girlfriend, you can hardly rely on him to try to keep the grandparent relationship going. It shouldn't be your job, but if he's a bad husband/dad, he is unlikely to be a decent son, so your daughter and her grandparents shouldn't suffer more because of him.

WallaceinAnderland · 25/09/2026 17:09

No, I wouldn't cancel it and also I wouldn't act like it was a big deal in front of DD. I would say, oh it's fine, the more the merrier. She will be happy with her friends and doesn't need to pay any attention to the GF children, or any other adults there. It's 2 hours, it's all been arranged, it will be fun.

The adults will just have to stand around bored or wait outside if there's not enough room for them but that's their problem.

Easilyforgotten · 25/09/2026 17:11

I don't understand why he can't be the 'extra adult to help'? Then it will be the 2 of you there as her parents, and you can be firm about the no grandparents, girl friend and her kids on the grounds of capacity? Would he stick to that or ride roughshod on the day?

TheCabbageMerchant · 25/09/2026 17:13

alcovecupboards · 25/09/2026 17:08

You shouldn't have booked a party on his weekend. You're actually outrageous for that and if he had done it you would be getting very different responses. I don't see why you can't just avoid the drama and allow his parents to attend for your daughter?

Exactly that. And I don’t believe for one moment that there’s a community hall that a capacity is so small. What a yarn.

Merrybandofpirates · 25/09/2026 17:13

You need to book things for your weekends, not his. And don’t tell him about them. Even if that means waiting a couple of weeks after her birthday. Wa stupid to plan it on his day and expect him not to ruin it when he has form for this.

BeKhakiReader · 25/09/2026 17:13

I’m afraid you can’t book something on what is technically his weekend and then not allow him and his parents to come (I think you do have an argument against the gf and her kids.)

I think you’ll have to suck it up for your daughter’s sake and make plans on your weekend next year.

Onegiantpupil · 25/09/2026 17:14

What about suggesting he just brings his mum but with the caveat that she is coming to help and give her jobs to do

Make it clear your mum is there to help so if he insists on making it tit for tat then that’s the compromise.

It is her party and she is 10 so I totally get she wants the day about her and not her quite young siblings or wider relatives.

Would an extra 2 people, ex and his mum work with the numbers?

DryadsRest · 25/09/2026 17:14

The thing is ex p is framing it as a family party for children that has excluded his family and his gf little ones - when it is not a family party and he was consulted beforehand and agreed with what his daughter originally wanted

Itsthewoluff · 25/09/2026 17:18

Tell him if he’s coming you won’t need your mum to go and help as he can instead. Or he doesn’t come at all and your mum helps.
His choice. But all the extras are not an option.

MrsVBS · 25/09/2026 17:19

Stop letting him dictate everything to you, you’ve arranged it/paid for it etc, be firm and tell him he can come on his own or pick your daughter up after and take her out with his parents and girlfriend. Stop letting him call the shots and say that you’re not talking about it anymore. And next time book it on your weekend!

DryadsRest · 25/09/2026 17:20

MrsVBS · 25/09/2026 17:19

Stop letting him dictate everything to you, you’ve arranged it/paid for it etc, be firm and tell him he can come on his own or pick your daughter up after and take her out with his parents and girlfriend. Stop letting him call the shots and say that you’re not talking about it anymore. And next time book it on your weekend!

Sounds like from the op posts that he might well agree to come alone then turn up with his gf etc

SandyHappyPerson · 25/09/2026 17:22

alcovecupboards · 25/09/2026 17:08

You shouldn't have booked a party on his weekend. You're actually outrageous for that and if he had done it you would be getting very different responses. I don't see why you can't just avoid the drama and allow his parents to attend for your daughter?

You're actually outrageous for that and if he had done it you would be getting very different responses.

I'm all for seeing things from the other way around, but I actually think you're wrong about that, she asked him first is it was okay, then he could have her after the party like normal, and he agreed, that was his chance to say if you do that we're all turning up too! He's let her organise everything then he's trying to shoe horn other children in at the last minute, even AFTER his daughter has told it she doesn't want that, he is now forcing it with OP instead and sounds like he would turn up no matter what his daughters preference is for her own party.

I'd like to think if it was the other way around, OP would be planning something special for just her and her DD for after the party instead, it's what I would do.. rather than try and insert herself and her family into his plans just because her DDs birthday happen to fall on one of her contact days.

Why he would want to crash a 2 hour party for 10 year olds girls I have no idea, saves him having to do anything nice with her afterwards maybe? Or seeing it as an opportunity for his girlfriends kids to be entertained for two hours for free. Either way he is being an entitled arsehole to upset his daughter over it.

Fortuity · 25/09/2026 17:25

I’m now thinking I should just tell him he isn’t invited if he is bringing everyone else, keep the party exactly as planned and let him have DD afterwards. But then I worry she’ll feel like I deliberately excluded her dad from her birthday.

Why would that bother her, given that she knows it's her dad who is trying to mess it all up?

waterrat · 25/09/2026 17:25

Would he be reasonable if you told him this is a 'girls' meet up? ie. as others have said, equivaqlent to the girls getting their nails done or going for a pizza? he is thinking of it as a family party which it isn't.

would his grandparents help make this clear iif you approached them?