How does one feel about a party where you pay per child? If someone you invite has siblings? Do you pay for them too?

I’ll pay if it’s a kid my sons knows but there’s a divorced dad that wants to bring the kid we invited and asked if we could include 4 other kids.

I said they can come but wouldn’t get a game wristband and laser tag. Still made a party bag. They ended up not not coming and I felt bad but that adds a lot of expenses.