In what’s sure be a tense episode full of emotion, a new Keeping Up With the Kardashians preview features Khloe discovering a lie while reading through an advance copy of Lamar Odom’s book. Khloe’s ex, Lamar, has published an autobiography, and it’s common for people who are heavily written about to be given a copy ahead of time for both legal and personal reasons.

Unfortunately for Khloe (and mom, Kris Jenner), while combing through the book, Khloe read something regarding her mom lying to her about something. While fans are not quite sure exactly what the lie was about (they’ll have to wait until the episode airs to find out), we do know that it was something significant enough to cause quite a stir. Khloe seems to be fuming, while Kris seems to acknowledge her wrongdoing, and is worried about Khloe’s reaction toward her.

According to E!, transcript of how the situation starts to play out on the show has been released, which starts with Khloe confiding in younger sister, Kylie. She says to her sister, “Lamar is writing a book. In the book, I found out that mom’s lying to me.” Fans are later treated to another preview showing Kris’s reaction. “I’m trying to do damage control,” the Kar-Jenner matriarch says solemnly, while footage of her scrolling intently through her smartphone flashes on-screen. And in a final preview, Scott Disick says to Khloe, “She literally thinks you’re gonna, like, come for her,” to which Khloe quickly responds, “Guess what? I am.”

Lamar Odom’s memoir, Darkness to Light, touches on his life growing up and his triumphant journey through the NBA to his time spent with the Kardashians and what happened after, including his 2015 overdose. Lamar then appeared on Keeping Up With the Kardashians once more for some light coverage and insight into his life post-overdose. Considering the amount of scandal and headlines that Lamar took part of during his time since meeting Khloe, one can only imagine the bevy of secrets that will come to light.

In regard to this lie, it can be in the context of almost anything, but one has to assume that it’s knowledge Kris held about their marriage. Hopefully, Kris has strong reasoning for her actions - most likely for her daughters protection. If that’s not the case, however, Kris is sure to see the wrath of Khloe that we’ve all come to know and love.

Next: Season 8 Was the Best Season of Keeping Up With the Kardashians