The way I structure the updates is that every main release completes one girls storyline. v.05 was Sabrina, and v.06 (what I'm working on now) is Brenda. Other girls don't get content until their own update.
Girls are chosen by votes on my subscribestar, and Amira lost the last poll. She'll be eligible again with the rest of the school staff for v.08 though, and she's really popular (and super hot haha) so maybe she'll get her update soon!