Family Tradition!

Kris Jenner — First In The Family With A Sex Tape

Jackie Collins had the scoop on the private video!

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Long before Kim Kardashian made her sex-tape splash, her mom Kris Jenner “performed” on camera while doing the deed!

That’s the claim by author Ian Halperin — who says the reality-star momager, 60, filmed a raunchy video at some point with former husband and O.J. Simpson defense attorney Robert Kardashian!

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Robert later divorced Kris, and died in 2003.

According to Ian, now a seven-figure payday is being offered for the lost sex tape!

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Ian has a classic Hollywood source for the claims, too .

He says that the late romance author Jackie Collins — a pal of Kris before her own death from breast cancer last year — told him of the tape’s existence!