WWW- In a chilling passage that reads like a confession, O.J. Simpson describes finding himself soaked in blood, holding a knife and looking down at the bodies of his ex-wife and the man he believed was her lover, the National Enquirer reports.

A source familiar with Simpson’s upcoming book told the Enquirer that the former football star writes about driving to Nicole Brown Simpson’s house in a jealous rage on the night of June 12, 2004.

“If I Did It” is billed as a hypothetical account – but readers may not see it that way.

According to the Enquirer, Simpson writes that he was at home when his friend “Charlie” shows up unexpectedly and tells him, “Nicole did drugs and took part in kinky, three-way sex.”

“O.J. explodes in rage. He’s worried about his kids and tells Charlie he’s had enough of being such an understanding ex-husband,” the source said. “He actually describes Nicole as ‘the enemy.'”

Simpson writes that he and Charlie jumped into his Bronco and drove to Nicole’s Brentwood, Calif., home, intending merely to scare her into cleaning up her act.

“He describes parking behind her condo and putting on the wool cap and gloves he wore for golf on cold days. Then he grabbed a knife he says he kept in the Bronco to deal with ‘crazies,'” revealed the source.

At this point, Charlie snatches the knife from Simpson, the Enquirer says.

Nicole has music on and has lit candles – which her angry ex interprets as meaning that she’s expecting male company. When Ron Goldman shows up, Simpson sees red.

“Simpson writes that he angrily accused Goldman of having an affair with Nicole,” said the source. “Ron denied it.”

At this point, Nicole opens the door “wearing a revealing black cocktail dress,” the source said.

“Ironically, Ron’s fate may have been sealed when Kato, Nicole’s dog, came out of the house behind her, saw Goldman – and wagged his tail,” the source said. “O.J. yelled, ‘You must have been here before – look, the dog recognizes you!'”

According to the Enquirer, Simpson writes that Nicole tried to hit him, and when he dodged her, she fell, hitting her head and that ” Goldman went into a defensive karate stance.”

“Charlie tried to drag O.J. away — but instead, Simpson grabbed the knife from his friend, pointed it at Goldman and challenged him to fight,” the source said.

Simpson writes that he doesn’t remember what happened next, the source said. The next thing he knows, he’s looking at the bodies and “that’s when he saw that the knife was still in his hand.”