Well, without more details about this 'Kimberley long story', it's really difficult to tell. It could be a personal story about a Kimberley's life journey, or perhaps a fictional story. Maybe if you mention some key elements like the genre, time period or the main events in it, I can answer better.
I'm not sure specifically as I haven't read it yet. But Kimberley Chambers is known for her gritty and engaging stories, so it's likely to be full of complex characters and a captivating plot.
I'm not sure exactly who Margaret is without more context from the '600 lb life margaret's story'. But she is likely a person who is the focus of this particular story within the '600 lb life' series, probably someone struggling with obesity.
Her promotion of birth control made her a rebel. In the context of her time, such topics were not openly discussed. But she defied the norms and pushed for women to have access to information and means of birth control.
I don't know for sure if it's a movie or a book. There isn't enough information provided to determine that. It could be either or something else entirely, like a documentary or a stage play.
You can try fanfiction.net. It has a large collection of fanfics from various fandoms, and there's a good chance you'll find some Cheryl Kimberley fanfic there.
Kimberley Chambers' Fantastic Fiction is often known for its engaging storylines. Her works typically have complex characters that draw readers in. For example, she might create a character who has to overcome many obstacles in a gritty urban setting, which makes the story both relatable and exciting.