AceShowbiz -

Khloe Kardashian made a surprising confession on her personal app on Thursday, January 28. The "Keeping Up with the Kardashians" star admitted during a "True or False" game with her pals Jen Atkin and Hrush Achemyan that she once caught her ex-boyfriend having threesome with other girls.

"One time, I walked in on my current boyfriend at the time and he was having not just sex - a threesome - with two girls he met at the mall earlier that day," Khloe said, leaving her pals to guess whether the story was true or false.

As the story sounded so juicy, both Jen and Hrush said that it was fake. "It's true!" Khloe quipped as her friends appeared to be surprised. However, the "Kocktails with Khloe" host didn't reveal who that guy was as she proceeded to another subject in the game.

While Khloe who's currently dating NBA star James Harden didn't want to open up about the cheater, she explained on Howard Stern's Sirius XM radio show earlier this month how she found out that her estranged husband Lamar Odom was cheating on her.

"This one girl did an interview, and she was so adamant!" Khloe said of one of Lamar's mistresses who made her believe that he was unfaithful to her. "When I confronted him, he blamed another teammate. And he said, 'That's another teammate's girl.' Blah blah blah. But I would feel it. This was when he was playing for the Clippers. I [was] genuinely blown away, like, 'When did he fit that in?' I don't know."