ANATOMY OF A SEX PSYCHO: INSIDE JAYCEE'S NIGHTMARE

As kidnap vic Jaycee Dugard's young daughters come to the realization their "big sister" is really their mother, the shocking details of psycho Phillip Garrdido sex stalag of horror are revealed in an exhaustive ENQUIRER investigation.

Kidnap victim Jaycee Dugard was forced to "marry" registered sex offender Phillip Garrido in a twisted ceremony inside the backyard shed where she was kept prisoner for 18 years.

That's just one of the shocking revelations uncovered in an exhaustive ENQUIRER investigation of the kidnap case that has stunned the nation.

Jaycee, abducted at age 11, was repeatedly molested by Garrido in a secret backyard lair of filth and squalor for 18 years, cops say. Garrido impregnated her at least twice, forcing her to give birth in a shed with no medical care.

Jaycee and her daughters lived hidden from the world in a jumble of ramshackle tents and sheds, washing in an outdoor shower and using an outhouse to relieve themselves like a concentration camp from hell.

But in the cruelest twist of all, Garrido, 58, brainwashed Jaycee into believing God wanted them to be together, and that she and her whole family would die if she tried to escape his evil prison.

"Even hardened cops are teary-eyed listening to Jaycee's heartbreaking story," said a source close to the police investigation. "How could anyone do this to an 11-year-old girl?"

Long, blonde-haired Jaycee was walking to her bus stop two blocks from her home in South Lake Tahoe, Nevada on June 10, 1991, when a gray car with two people inside pulled up. A woman jumped out, grabbed Jaycee, and the car sped away, according to witnesses.

The ENQUIRER has interviewed police sources and those close to Jaycee's family to piece together a detailed account of her 18-year nightmare, beginning with the moment she was abducted.

"Jaycee was held down, a coat over her head and her mouth smothered, and driven 120 miles straight to Garrido's house in Antioch in northern California," said the source.

"There, she was thrown into a soundproofed shed, specially prepared for her captivity, and locked in. She was given clothes to wear, an old mattress to sleep on and was allowed out only to shower and use the outhouse."

But the true horror began when Garrido - a musician who'd been granted an early release from jail after being sentenced to more than 50 years on rape and kidnap charges - raped the innocent young girl.

"Garrido brought a tape player into the shed and began to play a tape of him singing one of his own songs. Apparently, in his deranged mind, he thought it would create a romantic setting," said the source.

"He forced Jaycee down onto a filthy mattress, telling her, 'This is what God wants us to do.'"

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