We had a birthday party in our garden recently for DS (8).
Bouncy castle and food and party bags, the usual.
He chose who he wanted there (set a limit of 12-15 because the whole class would be a bit much), and we ended up with 13 who could make it.
One mum (who we don't even know) turns up with her eldest (invited) and then his younger sibling (5 or 6 ish?) in tow. And seemed to think that was totally fine to bring him along, despite him not being invited, no other siblings were there or invited.
She just turned up in the garden and said "His younger brother is tagging along. Do you want me to stay with them or can I go?" I very Britishly didn't want to cause a scene and was so shocked and embarassed that I didn't know what to say, so they stayed.
AIBU to think that that's totally out of order to just turn up and ask permission when she got there? She didn't contact me beforehand to ask if it was ok, or even drop the invited child off and then take the other one to the park around the corner. She's not a friend, hadn't even met her before!
So there was just some random younger child my DS didn't know at his party and there was the expectation from her that he would eat the party food and join in with everything.
Thankfully he was well-behaved, but him and the mum looked a bit put out when I said at the end that there were only party bags for the children that had been invited and we didn't have any spares.
Oh and to add further insult when they left and DS was opening his gifts, it turned out they had only given a card and no present!
DS said that the invited kid had handed him the card at the start of the party and said "My mum didn't get you a present because she didn't know what you like".
(because nobody could possibly guess what an 8-year-old might like - lego, or a game or chocolate or whatever. (she could have asked either of her kids what they like. What a ridiculous excuse.)
So she brings an uninvited kid to the party and then doesn't even bring a gift. Who the hell does that?!