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Kim Kardashian now understands why Kris Jenner is incredibly mad at Caitlyn Jenner. In the preview of the upcoming episode of "Keeping Up with the Kardashians", Kim accuses the "I Am Cait" star of discrediting Kris for writing a bunch of lies about her in her memoir, "The Secrets of My Life".

In the video posted by E! News, Kim tells Kourtney Kardashian how Caitlyn depicts Kris as a very bad person in her memoir. Like her sister, Kim initially thinks that Kris is exaggerating, but she changes her mind after reading the book. "[Caitlyn's] so angry at mom, like for no reason," she reveals. "It was like, 'I didn't speak to my sister because of Kris. I didn't see my kids because of Kris.' Like, grow up and say, 'I didn't call my kids!' "

The mother-of-two then shares that Caitlyn accuses Kris of taking her money during their marriage. "She said, 'I didn't see a dime of my money.' She was insinuating that mom took the check and pocketed it and had this huge savings," Kim shares, before adding, "The money wasn't going in mom's pocket."

Due to Caitlyn and Kris' feud, it is believed that the Kardashians and Jenners are currently in "family civil war" as everyone is taking sides. "It's like a family civil war inside the Jenner-Kardashian clan right now with everyone taking sides," a source tells HollywoodLife.com. "Caitlyn and her sons are freaking out over Kim's recent revelations on TV that Kris will likely never talk to Caitlyn ever again."

The source further reveals that Caitlyn's sons are siding with her while Kendall Jenner as well as Kylie Jenner are stuck in the middle. "Brandon and Brody Jenner respect their father's lifestyle and are happy to have Caitlyn's back in this drama while Kim, Kourt and Khloe are on Team Kris all the way," the source continues. "Right now, this is a fractured family leaving the youngest girls, Kylie and Kendall, missing the good times of the past when everyone got along and they were all happy."