Wow, nothing like a young woman scorned. This is a chapter where Sonja becomes her mother long enough to blackmail/fucking a man into helping her kill Betty and her friends. Now, as stark as it seems at times, I think it was something building up for quite a few chapters (like fifteen, actually).
Dolcett Girls 25: Preparations Forms (F-solo, FF fdom sn viol bd dream, MF oral cons)
Sonja finally has a plan to get her revenge, but she needs help with doing it. The bus driver, Mark, would be the first one to help her, once she convinced him.