Re: reveal.
Alice is having very, very sudden flashbacks to her Dad and Stephanie's parties when she was growing up. She can't leave quite yet though because she did text people who might be expecting her there. She's definitely making her way to the PG-13 side and if Danny did come, there's lot of apologies.
Rey didn't expect this but it doesn't really seem to bother her too much. She's mostly fascinated and has a similar expression as she did during the Festival of the Ancestors. She's curious, you know? She'll be asking questions but also her main priority is still dancing ¯\_(ツ)_/¯
I mentioned Albus realized quickly this was a mistake, right? Unfortunately, not quick enough because Helena totally ran off in the direction of the games. Albus is just going to look horrified and go running off to collect her. PG-13 is still a little too old for her. She, on the other hand, isn't thinking anything of it and just is excited to be at the party with the grownups and wants to see her favorites.
Charlie has no qualms against the idea of any of this and will totally be interested in migrating towards the 18+ section.
Quill will hesitate momentarily, having an internal tug-of-war with himself about this, before deciding it's fine and letting himself enjoy the night.