But, it was news to her... and that's because she had been lying to Lamar about trying to get pregnant while they were together.
"I was married," she explained on the show. "But I knew the circumstances weren't the healthiest, so I just kept pretending I was trying."
Then, in a confessional, she says that "when I was doing my fertility treatments, like, they were more so for Lamar.
"I had to stop because there was much deeper stuff that was happening in our marriage. I knew, you knew, that it wasn't the right kind of situation to bring a child into, and I think I've done a lot of covering up for him."
Now that Lamar has heard the truth, he's lashing out.
A source close to the NBA star has revealed that, "He feels totally betrayed."
Another source close to him has claimed that after his coma in 2015, "he's owning up to his mistakes. Meanwhile, Khloe blames him for everything and takes no accountability. But, while they were married, she had always said that she felt like he was her soul mate; and having babies with him was all she wanted. Nonetheless, now, she's saying it was all lies."
But it's completely different news for her new relationship with Tristan Thompson, with Khloe revealing that she wants to have children with him, like asap.
“Tristan and I definitely talk about starting a family,” Khloe tells the cameras. “He wants to have about five or six kids with me and that’s lovely. We could start at one and we could grow from there. But now knowing I’m not on birth control is scary. It’s like a really big step.”