That’s the shocking claim of 23-year-old Amanda Wyatt, who swears she had unprotected sex with hard-partying Urban while he was dating Kidman.

“I’m sorry if I hurt Nicole, but I just want to tell the truth and move on,” the part-time Nashville model told London’s Mail on Sunday. “I hope that she finds happiness with him, but Keith is a deeply troubled man.”

Wyatt told the paper she met Urban, 39, at a Nashville bar in 2004 and sought a one-night stand. But she said their wild night together, fueled by drugs and alcohol, was only the beginning.

“We were together throughout the whole time he was dating Nicole and engaged to her, right through 2005 and to around May 2006,” she claimed.

Urban married Kidman in Australia last June. Four months later, he checked into the Betty Ford rehabilitation clinic. Urban and Kidman spent the Christmas holiday together.

Wyatt alleged the country singer, whose latest single is "Stupid Boy," was rarely sober during their affair.

"He drank constantly - his favorite was Crown Royal Reserve whisky - and he did drugs," Wyatt told the Mail. "Ecstasy, cocaine, pot - you name it."

Wyatt said Urban sent her explicit text messages inviting her to his Nashville mansion for sex while Kidman was out of town. She claimed he often swam naked with her in his pool and enjoyed taking bubble baths with her.

"He told me he loved me. He was always telling me how I made him feel young, how I was sexy and beautiful. It was a real turn-on," the Mail quoted her as saying. "I sometimes wonder if he said the same thing to Nicole."

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