Reality star Khloé Kardashian was shocked to learn her husband Lamar Odom had cheated on her for the majority of their marriage.

The 31-year-old tied the knot with the former Los Angeles Lakers player in September, 2009 after a whirlwind month-long romance, but she filed for divorce in December, 2013 amid claims of Lamar's infidelity and drug problems.

Now Khloé has revealed the extent of her former spouse's deception during their union.

"Nothing was on his cell phones, (but) he had an assistant," she explained to Howard Stern on his SiriusXM radio show on Wednesday (13Jan16). "They were all on his assistant's phone, so he was really crafty. All these rumors kept coming out in the weeklies, and as much as I know, they're bulls**t, (but) where there's smoke there's fire. Something has to be right here."

Khloé finally confronted the 36-year-old after becoming perturbed by how adamant one girl's account of a liaison was, but Lamar tried to blame one of his basketball team mates.

"He was like, 'Oh, that's another teammate's girl, blah blah blah...'" she continued. "This was when he was playing for the (Los Angeles) Clippers his last season. It is humiliating on any level, but I found out he was cheating on me the majority of our marriage, I just didn't know."

Despite the discovery, Khloé doesn't regret tying the knot so quickly or have any doubts about whether Lamar truly cared for her during their four-year union.

"I know he loves me; I know we love each other," she said. "I know all of that - I don't question those feelings."

The star also opened up about Lamar's battle back to health after being found unconscious in a Nevada brothel in October (15) following a drug overdose.

Khloé has been a pillar of support to her estranged spouse, and now he's properly on the mend, she told Howard how she had made Lamar promise never to visit a brothel ever again.

"I've said, 'You do whatever the f**k you want to do, but please promise me you'll never go back to a disgusting brothel again," she said. "If you want to pay someone, you can pay someone in the privacy of your hotel."

Khloé is now in a relationship with another basketball player, Houston Rockets star James Harden.