I have 3 kids and booked 4 tickets - once for my husband with the kids and once for me. They let us both plus grandma in each time - we weren’t taking photos or meeting the princesses, it was all for the kids. This was just last week on the Wonder. The Princess greeting is in the atrium so it’s somewhat a free for all. Frozen is in AP but there was no issue either time, we just asked if the extra adults could come along to watch.