Now I know some people have to bring siblings and ask in advance. However I know this person doesn't ask, as they brought their older sibling to my child's party a few weeks ago and didn't ask. I had made packed lunches, so I didn't have extra boxes . In fact they didn't even say when arriving. The very rude child then demanded lunch and a party bag, the mum was oblivious and today was style same.
Today this sibling who is at least 5 years older than the birthday child took prizes when not enough for the actual friends of the birthday girl. AIBU, or should I and al parties over cater for a everyone to bring siblings?