Is it true that James Harden Cheated On Khloe Kardashian?

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Khloe Kardashian reeled out that James Harden begged her to be in an exclusive relationship ... only to CHEAT ON HER ASS! Lol!

KK put Harden on blast on "Kocktails with Khloe" on FYI -- saying the Houston Rockets star was so into her, that he sweet talked her into monogamy  -- and then screwed her over.
"He sought me out, he wanted to be committed ... then wasn't committed."