Hosting DS's 3rd birthday party at the weekend. It's the first birthday we've invited a few nursery friends to. I'm completely bonkers and decided to do it in our garden as thought the weather would be nice enough for a bouncy castle etc.
All in all there are 10 children coming. All around 3. One of the mums has just messaged asking if their son's sister can come too as she has no one to watch her. Sister is nearly 5 I believe.
If we were in a hall I'd probably agree but AIBU to say no in this case? I'm already stressing over having ten 3 year olds running around the garden. There will be additional adults there in grandparents and aunty and realistically one extra child won't take up much room but I just feel like it's cheeky and changes the dynamics. They were very late in responding to the invite - only knew they were coming 2 weeks ago and no mention of additional child then.
If I say sorry, due to space we can't accommodate, I won't really mind if she says the boy can't come then. The issue would be if it's awkward she miraculously finds childcare and comes along!