In a preview clip from Sunday's all-new episode of Keeping Up With the Kardashians, after reading Jenner's book, The Secrets of My Life, Kim tells sister Kourtney Kardashian that she no longer stands by the transgender star's claims.
"Did you read the whole thing?" Kourtney asks. "Cause I was thinking, is mom exaggerating and making it a big deal?"
"Caitlyn's so angry at mom, like for no reason," Kim answers, bewildered. "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!'"
To make matters worse, Kim claims Caitlyn "discredits" ex Kris throughout the entirety of the book.
"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 says, explaining that the family struggled financially for some time. "The money wasn't going in mom's pocket."
"They made the money together," Kourtney chimes in. "Even when mom would book appearances, I worked for her, I would hear her phone calls in the office. She would hustle to get speeches. She changed Caitlyn's career and she made her have this motivational speaker business."
Later, Kim explains why the Kardashian name was spoken during Caitlyn's infamous interview with Diane Sawyer in 2015.
"Then she said, 'The Kardashians were so upset when their names weren't mentioned in Diane Sawyer, but it was all deliberate. We did research and any time the word Kardashian was mentioned, people thought, they put the word Kardashian with publicity stunt and so we deliberately never put the name in there," Kim says.
"And that sounds pathetic," Kourtney agrees.
As Radar reported, during an interview with the Today show last month, 67-year-old Jenner revealed that she's been steering clear of her stepdaughter.
When asked further about the situation, Jenner confessed, "Well, to be honest with you, I really haven't talked to her in a long time. I've kind of let everything calm down. So I kind of stay — you know, I keep my distance."
"I'm out right now trying to make a difference in the world, I live in a very marginalized community where the murder rate is out of control."
Of course, Jenner insisted she's still fond of Kardashian. "I love Kimberly, I think she's a wonderful person, we have a very good relationship."
Keeping Up With the Kardashians airs Sunday at 9 p.m. ET on E!.
We pay for juicy info! Do you have a story for RadarOnline.com? Email us at email@example.com, or call us at (866) ON-RADAR (667-2327) any time, day or night.