An explosive new book is set to lift the lid on the Kardashian family's BIGGEST secrets.
The Kardashians: An American Drama claims that Kris Jenner's first husband Robert - who is father to Kim, Kourtney, Khloe and Rob Kardashian - was obsessed with Elvis Presley’s ex-wife Priscilla, that Kris cheated on Robert constantly - and the real father of Khloe is OJ Simpson.
The book, which has been chronicled by The Sun, was written by Jerry Oppenheimer - who claimed that Kris' mother Mary Jo 'pimped her out' to wealthy men in order for her to marry into a rich family.
The book states that high school pal Joan Zimmerman thought Mary Jo was "kind of pimping" Kris out when the 17-year-old started a relationship with golf pro Cesar Sanudo, who was more than ten years her senior.
But then, Kris met Robert, the son of a wealthy meat-packing magnate, at a horse racing track and Robert proposed to her just three weeks after she split from Cesar - but Kris said no.
Robert then moved on with Elvis Presley's ex-wife Priscilla, who is described as “kinky” in the book. "While he was making love to Priscilla, she would get incoherent phone calls from Elvis. She would put the receiver on the pillow and let him listen."
However, Priscilla later ended their relationship by saying, "I’m not going to marry anyone until Elvis dies."
Robert then rekindled his romance with Kris, who was by then working as an air hostess, and the pair married in 1978.
Kris had her first four children — Kourtney, Kim, Khloe and Rob — before her relationship with Robert turned sour, and she started cheating with LA Heat soccer player Todd Waterman, who was 11 years her junior.
Robert’s childhood pal Joni Migdal said, "Kris was coming home at two and three in the morning drunk. She would tell Robert, ‘I have four kids and I have not lived life.’ ”
Kris said she and Todd had sex in cars, in a closet, on a tennis court, in a pool house and in a garage, but Robert uncovered proof of their fling and in a fury, he swung a golf club at the back of Todd's car.
Todd clamed, "I said: ‘Holy s***, Kris, can I pull over and confront him?’ She screamed: ‘No — he might have a gun.’"
The book also claims that Robert's close friend OJ also confronted Todd, telling him, "You just f***ed Snow White. Now you’re going to have to deal with me."
OJ was also involved in affair claims with Kris - which led people to believe that he is Khloe Kardashian's biological father.
Kris and Robert were said to not have had sex during the time Khloe, who was born in 1984, was conceived.
Robert’s pastor Kenn Gullikse said, "It was my strong impression that he loved Khloe very much. But he said it in a way that implied, ‘She’s not my blood daughter.’ "
OJ denies being the father, but Robert was unwilling to take a DNA test and said "whoever her father is . . . she is my child."
Kris went on to marry Bruce Jenner after divorcing Robert Kardashian | David Livingston / WENN
However, years later Robert's subsequent wives Jan Ashley and Ellen Pierson claimed that Robert thought that Khloe was not his biological daughter.
Kris and Robert divorced in 1991, and months later, Kris married Olympian Bruce Jenner - who know lives as Caitlyn.
Then in 2003, Robert was diagnosed with oesophageal cancer, and died eight weeks later. On his deathbed, Priscilla Presley allegedly called to tell Robert she loved him, which "brought tears to his eyes".
Years later, after the Kardashian's found fame with their reality series Keeping Up With The Kardashians, Robert's widow Ellen Pierson sold off excerpts of what was allegedly his diary.
Famous family: The Kardashians found fame with their E! reality series | Adriana M. Barraza / WENN
The diary reportedly claimed that Kris left the kids unattended while she “screwed all night”, and that the momager pulled Kourtney’s hair and twisted her arms, and that Kim was allegedly beaten.
Kris sued Ellen in 2013, insisting that Robert’s children owned the diary’s copyright. The copyright claim was settled in 2014, and the Kardashians were awarded £64,000.
The Kardashians: An American Drama, by Jerry Oppenheimer, is set for publication on September 19.
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