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Tiger Woods allegedly impregnated his porn star mistress twice, both times when his wife was also pregnant, according to an interview with the woman set to air Monday.

Joslyn James, the star of such adult classics as Big Breasted Nurses and My Sex Teacher #12, said her lengthy and steamy affair with Tiger Woods always involved unprotected sex.

Using protection "was never talked about," the actress told U.S. television show Inside Edition.

"It was never protected."

James, 32, who carried on an affair with Woods from 2006 to 2009, said she miscarried in her first pregnancy at about the same time his wife, Elin Nordegren, gave birth to daughter Sam Alexis on June 18, 2007.

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James said she aborted her next pregnancy close to the Feb. 8, 2009, birth of Woods' son Charlie Axel.

Woods was never told about either pregnancy, she said, claiming she "just didn't want to ruin anything."

The buxom adult film star said she was close to breaking the news to Woods, 34, but said she chickened out just before suffering the miscarriage.

"Actually, the day I was going to tell him, I had a miscarriage," she said.

"After I lost the baby I didn't want to talk about it."

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But the miscarriage fueled her desire to be with Woods.

"I got more emotionally attached," she said.

Despite her more-than-passing role in Woods' marital debacle, James said she regretted the scandal's impact on Nordegren.

"I feel bad for (Elin)," she said.

"She didn't deserve this, and she didn't deserve being humiliated."

James said she believed Woods' scorned wife never had a clue that her husband was playing around with a porn actress.

"Not to my knowledge," James said.

"But she had two kids at home, and she was stressed out."

Woods and his wife were said to be living apart in the same Orlando-area neighborhood so he can visit with their children. Nordegren was not wearing her wedding ring during recent weeks.

Woods took an indefinite leave from golf and his return to the sport remains shrouded in mystery.