Khloé Kardashian Says Mom Kris Jenner's Affair 'Destroyed' Robert Kardashian

The reality star also opened up about James Harden's infidelity.

"I just believe in being honest," Khloé continued, "and even if you're not feeling something ... you don't even have to want to cheat, if you're just not fully invested in the relationship, I believe in being honest about that."

"Like, why wouldn't you say, 'Ok, that's great!' Nope, he sought me out. He wanted to be committed and you know, then, wasn't committed," she explained. "So KoKo had to let him go, go. ... I was like great, this guy's in it for the long haul. Let's do it. [Then I] found out he wasn't! And I got the receipts to prove it."

Khloé and Harden were first reported to be dating back in July. The two recently split up.