Khloe Kardashian confessed that she kept some details of her relationship with Lamar Odom, a secret from her sisters, Kylie and Kendall Jenner.

The 40-year-old socialite had a heart to heart conversation with her sisters about her first meeting with Lamar, nine years after their split.

During the last episode of The Kardashians season 6, which came out on Wednesday, April 9th, Kendall advised Khloe to move on and forgive Lamar.

However, the supermodel, 29, noted, “There’s so much that you kept from us — in a good way, not in a bad way, cause we were so young. It was so rated R, I don’t expect anything else. But it’s interesting because Kylie and I actually don’t know a lot of it,” as per People Magazine.

Agreeing with her sister, Kylie said, “I feel like he really was a huge part of the family and like a big brother to me. We had a silly, funny relationship.”

The reality star, 40, then admitted in a confessional that she “sheltered” her younger sisters from the messy details of their divorce.

“I didn’t wanna ruin that for them and I just wanted to preserve as much of their innocence as I could,” she said of protecting her sisters’ bond with Lamar.

Judging Khloe’s recent reunion with Lamar, Kendall said that she could sense “hostility” in her reaction, “there’s definitely a wall, definitely a coldness,” she said, adding “I’m sure it’s anger. I’m sure there’s so many reasons as to why.”

The mom of two confessed that she “started getting really anxious without me even noticing it” as soon as she was with Lamar.

“The tardiness, the sweating, things that maybe are triggers for me. And I just was like, I have to get through this,” she continued.