Okay I've read this twice, And I still can't figure the affair with the director thing out. Did Misa just start a rumor about an affair because she was jealous of all of the attention Maya was getting from the guys? Or did Maya actually sleep with director so he would leave Shin-chan alone?
I really hope it's the former. I really don't like plots where the lesbians seduce guys to keep them away from the girl the lesbian is crushing on.
Basically:
Maya -> Acting airheaded and being fawned over by director
Misa -> Acting super friendly/bubbly to get guy's attentions
Guys -> Pay more attention to Maya than Misa, causing jealousy (implied by guys frequently asking Maya out as "her one")
Misa -> Starts rumors about Maya trying to make guys less interested in her
Misa -> Hangs out with Shino (no bad intentions)
Maya -> Gets jealous that Misa is hanging with Shino
Maya -> yandere mode
Misa has no idea that Maya has any feelings for Shino and thinks Maya is basically trying to sleep/flirt her way up and is jealous (mostly because she wants to be fawned over instead)