Nevada Department of Corrections

One of O.J. Simpson's prison guards is revealing in a new documentary that Khloe Kardashian begged OJ Simpson to take a paternity test out of fear that he was her birth father.

In the documentary about Robert Kardashian, Jeffrey Felix explains that he overheard a conversation between the reality star and the fallen hero at Lovelock prison in Nevada, where former sports star is currently serving a 33-year term for robbery.

For years, paternity rumors have plagued the 31-year-old as it is believed that her mother Kris Jenner had an affair with Simpson, who was her husband's best friend.

The guard has fanned the once-dying flame, claiming in the documentary, called Kardashian: The Man Who Saved OJ Simpson, which airs Monday night on Reelz.

We really aren't surprised the hear these claims since we (along with many others) think that Lamar Odom's ex looks the least like her sisters or like her late father.

Speaking of Odom ... on Sunday's episode of Keeping Up With The Kardashians, the blonde said that she refiled for divorce from the troubled basketball star because she wants to move on with her life and eventually have kids.

The curvy lady said, I love Lamar with all of my heart and I want the best for him. But now I feel I'm back to it being the hardest thing to do."

The starlet, who split from the former Lakers player in 2013 after four years of marriage, said, "I want to have kids and maybe to be remarried one day. I need to move on, and I will be filing for divorce very soon."

As much as we loved Khlomar -- we think she's right: it's time to move on ...