Kris Jenner's Nightmare! Shocking New Details From Caitlyn Jenner's Tell-All

Caitlyn Jenner's long-awaited memoir, The Secrets of My Life, will hit the shelves in just a few short months and RadarOnline.com has exclusively learned that the transgender rights activist will not only expose the secrets of her own life, but also secrets of her estranged Kardashian family!

The book, which is written by Pulitzer Prize-winning author, Buzz Bissinger, and is set to be released on April 26, 2017, will go into great detail about her very public transition to become a woman. But that's not all!

As previously reported, Caitlyn's ex-wife of 24 years, Keeping up with the Kardashians matriarch, Kris Jenner, 61, threatened to take legal action against Caitlyn to prevent her from telling ALL in the upcoming book.

So did Caitlyn — who has already written six books based on winning the Olympics as Bruce – back down from slamming her estranged ex?

"Caitlyn decided in the end that she was not going to bash any of her children, but she does discuss her relationships with them in the book," the source told RadarOnline.com.

"Right now, Caitlyn has pretty much no relationship with all of the Kardashian girls, with the exception of Kim who she talks to quite regularly."

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"She was very open with the girls about what she was going to include and her book and what she wasn't," the insider added.

"As far as Kris goes, Caitlyn does slam her and she does talk about their marriage and divorce. She basically says that the love between them died long before the marriage ended."