No wonder they broke up!

Khloe Kardashian has been relatively quiet about the reason she called it quits with James Harden, but she just let the cat out of the bag on Kocktails with Khloe that the basketball star cheated on her!

"You know, I just don't want to put up with people that—you want to be monogamous, but then you're not monogamous. I'm not into, like, I've always said, you know, it's long distance, it's this or that, I've always said we don't need to be monogamous. Like, you know, there's a lot of s--t going on in both of our lives. You live in Houston, I live in L.A., like let's just—let's see each other when we see each other. Like, why wouldn't you say, 'OK. thats great?' No, instead [of] you know forcing a relationship, let's be committed, Let's be committed..." she explained.

"He wanted that. I was, I mean I wanted it, but I wanted to be realistic. I was like, you know what, it's unfair. I'm working so much right now, you're in Houston, let me just say, we don't need to be committed. Nope. He sought me out, he wanted to be committed, and you know, then wasn't committed, 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. Uh, found out he wasn't, and I got the receipts to prove it," she added.

James Harden's an idiot, because look what he's missing out on! We caught Khloe doing some shopping at Saks Fifth Avenue in Beverly Hills today, and the reality star was looking hotter than ever! With a booty like this, she should have no problem finding a new man that won't cheat on her. Although, we wish she would just get back with Lamar already. Khlomar forever!