The queen of the Kardashian-Jenner household allegedly has a sex tape, Radar Online's insider revealed.

Apparently, the 58-year old seem to have had some private session of hers taped which is now allegedly in the possession of an unnamed man.

"At first she thought it was a joke, because she knew it couldn't be real," Radar Online's source spilled. "Obviously she would never allow herself to be taped like that! Initially, she just ignored it."

However, the Keeping Up With The Kardashians star reportedly got worried when the stranger relentlessly tried to contact her regarding the sex tape.

Radar Online's source shared, "He called Kris more than one hundred times in the last seven days, from more than 100 different phone numbers. He uses scrambled cell numbers. He called more than 25 times just yesterday (Sunday) alone!"

According to the unnamed source, the man who allegedly has Kris Jenner's supposed sex tape is asking money from the reality star in exchange for peace and quiet. "If he's not paid, he claims, he'll release the tape," the unnamed source added.

It is not clear if the man truly has the 58-year old's sex tape but Radar Online notes that a certain man who claims to have the alleged sex tape "could not present any proof the video even existed." The man reportedly contacted Radar Online, says the outlet.

The rumored sex tape is not the only thing bothering Kris Jenner, though, as Radar Online's unnamed source dished out that the Keeping Up With The Kardashians mom claims she was also allegedly stalked by the same man.

"The family has drastically stepped up their security and Kris had no choice but to turn all the information over to law enforcement and to [the family's private investigator] Gavin DeBecker," added Radar Online's source.

Of course, that Kris Jenner's alleged sex tape really exists must be taken with a grain of salt. After all, the Kardashian-Jenner clan has been deemed as one of 'TV's FAKEST Family' by Radar Online.

Will Kris' alleged sex tape be hitting online anytime soon, if ever?