Siblings and uninvited classmates at 8yo's birthday venue
My son chose an expensive place to have his birthday party at this year (though really fun and cool) and we agreed if he limits the invite list since we are paying per person. He agreed and is inviting 6 boys -- some are friends from school, others from after school activities, one is family friend, and all are close friends of his. His younger sibling is attending too but she is the only younger child there. I sent out invite by email stating specifically no siblings and that only the invited kid is covered. It is a drop off party, though parents can stay and do not have to pay as long as they don't play/participate in the activity. I have gotten some emails from other parents asking if their other kid (invited child's siblings) can come too since it is so cool and he loves this place. One mom whose kid is not invited told me that she heard from another parent (their sons are friends) that my kid invited the other mom's son to this party and her kid likes this place and would love to join. This seems completely rude and inappropriate to me, or am I wrong? My kid only invited 6 friends and is not discussing this in school, so i don't see why I should extend the party to kids who are only casual friends of my son and who he did not pick to attend the party as one of the 6. I told the mom with the friend that my son was limited to 6 attendees only and her son was not on the list, and told the moms with the sibling that even though the sibling is welcome and can share in the pizza/cake (we will have plenty), we are only covering the cost for the invited kids. Is including sibling and whole classes the norm now? I would not mind the questions but I specifically stated no siblings and am pretty annoyed that I am getting these emails/requests making me the bad guy in this. My son is 8 years old in case it matters.