The 27-year-old is now forced to face a new devastating report suggesting that Robert's former client and best friend O.J. is actually her real dad.
A source close to the Kardashian's was quick to dismiss the allegations, telling MailOnline today: 'This is ridiculous and laughable,'
More daddy drama: Now Khloe Kardashian is facing reports that former family friend O.J. Simpson is her real father
American tabloid The National Enquirer today ran a story that claimed the jailed former sportsman told friends that Khloe was his.
'O.J. told me Khloe's his child,' a source is quoted as telling the publication.
They allege that Khloe's mother Kris Jenner had several trysts with O.J. around the time Khloe was conceived.
They also point out the similarities Khloe shares with O.J.'s 26-year-old daughter Sydney.
Former friends: Kris and Robert are seen in this vintage snap posing with O.J. Simpson and his late wife Nicole
The National Enquirer claim that Kris had an affair with O.J. years earlier in 1983, and shortly after fell pregnant with Khloe.
'It was the big secret that no one in the two families would discuss,' the source told the tabloid.
'And Robert admitted he and Kris were not having sex at the time Khloe was conceived.'
Road to freedom: Robert was part of the legal team that got O.J. off for the double murder charges of his wife Nicole Brown and her friend Ron Goldman in 1995
Kris was also close to O.J., as well as his wife Nicole.
'O.J and Kris have known each other for more than 30 years,' another source told the publication.
Similarities? The publication has pointed out similarities between Khloe, left, and O.J.'s daughter Sydney Simpson, right
They allege that O.J. boasted about his affair and told friends about a 'secret love child' he had.
'O.J. bragged about his sex life and many female conquests, which he said included some of his best friends' wives,' yet another source told the National Enquirer.
Daddy and me: Khloe is pictured here with her father when she was just a little girl
'But at the time of Khloe's birth, it would have been devastating for the news to come out that America's biggest sports hero had fathered a love child.
'O.J.'s career as a product spokesman - which earned him well over $10 million - could have ended.
Clan: Khloe is seen here with her sisters Kourtney, middle, and Kim, far right, and father Robert during Easter one year
The story, which has been slammed by friends of the Kardashians, comes after the ex-wife of Robert continued to insist that the reality star isn't his biological daughter.
Robert's ex-wife, Jan Ashley, says that he hid the fact that Khloe wasn't his in divorce documents filed when he caught her mother, Kris Jenner, cheating on him.
'He would never say in court documents that Khloe wasn't his,' the divorce lawyer's second wife told RadarOnline.com.
Ashley was responding to recent reports that the legal documents filed proved Robert's paternity.
Angry: Last week Khloe took to her Twitter to express her anger at Robert's two ex-wives
The other children include Khloe's big sisters Kim and Kourtney, as well as younger brother Robert Jr.
Jan, along with Robert's third wife and widow, Ellen, shocked the world last week when they independently revealed that Khloe wasn't Robert's child.
They're claiming that she is the daughter of a man Kris, now 56, was having an affair with while married.
Toyboy: This man, revealed in a picture obtained by Radar Online, is allegedly Kris Jenner's former flame
Jan broke the news to Star magazine, which was corroborated in a separate interview with Ellen Kardashian.
Khloe and her sister Kim are outraged over the claims, though she Khloe openly expressed her doubt at being a true Kardashian on her E! reality show.
She has never taken a DNA test with her siblings to determine the truth of her paternity.
Khloe's sister Kim, 31, stepped in to defend her sister, urging the media to 'stop the lies.'
The Kourtney & Kim Take New York star wrote on her website: 'We face adversity every week and as you all know, we have always tried to take the high road and continue to work hard.
'But when the media try to manipulate things and write things that are untrue about our business ventures and our shows, it’s time to step in and correct the lies.
Support: Khloe's older sister Kim has also come out to defend her sister
Simpson has been imprisoned in a Nevada jail since 2008.
He’s currently serving a 33-year sentence at Lovelock Correctional Centre in Lovelock, Nevada after he was sentenced in 2008 to a total of 33 years in prison for kidnapping and armed robbery.
He has the possibility of parole in 2017.
Jailed: Simpson is currently serving a 33-year sentence at Lovelock Correctional Centre in Lovelock, Nevada after he was sentenced in 2008 to a total of 33 years in prison for kidnapping and armed robbery