In a clip from Sunday’s upcoming episode of Keeping Up With the Kardashians, Kim read a passage from Caitlyn Jenner’s The Secrets of My Life about her late father, Robert Kardashian, which she later claimed to be a bold face lie.

“Robert Kardashian knew O.J. Simpson was guilty but joined the defense team to get back at his remarried ex,” Kim said aloud to sisters Kourtney and Khloé. “Robert told Caitlyn in secret, after the O.J. trial that he believed his friend was guilty.”

Their father, Robert, defended O.J. Simpson in the infamous 1990s trial.

“It is so shady that Caitlyn came over and gave me the book and said, ‘Well, the final version has a few more things in it but don’t worry, it’s nothing about you,’” Kim said. “So she lied to me, because it is about me if it’s about our dad.”

Watch the clip below: