The incarcerated former football star and murder suspect now says he's changing his will to give a share of his estate to the reality TV star.

Issac Brekken / Pool / Getty Images OJ Simpson stands during sentencing at the Clark County Regional Justice Center December 5, 2008 in Las Vegas, Nevada.

O.J. Simpson has a lot of time to think in prison, and it looks like his imagination might be running away with him.

In 2008, 13 years after being acquitted of the 20th century’s most sensational double homicide, the football Hall of Famer was sentenced to 33 years in prison for armed robbery and kidnapping, where he remains. But according to the National Enquirer, O.J. has just realized something: Khloe Kardashian is his biological daughter, at least according to an “anonymous insider” who spoke to the tabloid. “O.J. believes Khloe is his natural-born daughter through his affair with Kris Jenner when she was married to his buddy Robert Kardashian – and he wants to do something about it,” the aforementioned insider reportedly said. Now, the 65-year-old former athlete is reportedly putting his money where his mouth is: he has allegedly decided to include Khloe in his will, to the chagrin of his other four children: Arnelle, 43, Jason, 42, Sydney, 26, and Justin, 24. “At first they thought he was just making a big joke, but when they realized he was serious, they were flabbergasted,” said the source to the National Enquirer. “They are furious and wonder why they have to share the wealth with a complete stranger.”

Getty Images Sure, it’s wildly far-fetched, but it’s not impossible — not entirely, anyway. Khloe’s father Robert Kardashian, who died in 2003, was a friend of O.J.’s and one of the attorneys who helped secure his acquittal in the murder of his ex wife Nicole Brown Simpson and her friend Ronald Goldman in 1995. And ever since Khloe’s mom, Kris Jenner, admitted to having an affair with someone around the time of Khloe’s conception, rumors have circulated as to the young reality star’s parentage. On a 2009 episode of their E! reality show Keeping Up With the Kardashians, the 27-year-old Khloe questioned if she was adopted. In January, Star magazine published a story speculating that Robert Kardashian did not think the reality star was his daughter. “Khloe is not his kid. He told me that after we got married,” ex-wife Jan Ashley, 63, whom Kardashian married after Jenner, told Star. “He just kind of looked at me and said [it] like it was a matter of fact.”

A source “close to the Kardashians” told the UK’s Mail Online that the allegations were “ridiculous and laughable.”

But we’ll let Kris Jenner have the last word. The reality-show “momager” was blunt on the subject of Khloe’s dad during an appearance on Good Morning America back in January. “I gave birth. I know who the dad was,” she said. “I have never heard such crap in my life.”

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