It's not a true story. Usually, such titles are part of the creative imagination in the world of fiction. They aim to draw people in with exciting and sometimes outrageous plots that aren't real.
Killer Cheer Mom is not based on a true story. It's purely a work of fiction crafted by the imagination of the writers and creators to provide thrills and excitement to the audience.
It's hard to say for sure. If the author or creator has stated that it's based on real-life, then it might be. But often, stories like these can be a blend of reality and imagination to make it more engaging.
I'm not sure which novel you're referring to because you didn't provide any relevant information. If you can provide more context or clarify your question, I will be more than happy to help you.