The stripper at the center of the Josh Duhamel cheating scandal is under fire...he says she made it all up, but she says she's got proof.

"He calls your story absolutely ridiculous. How do you respond to that?" INSIDE EDITION's Diane McInerney asks Nicole Forrester.

"He knows it's true, he knows it's true and when he sees those texts he's definitely gonna be like, 'Wow,' " she says.

Forrester says she met Fergie's new husband when he came into the Atlanta strip club where she worked. She says he called himself J.D. and that they exchanged about 25 intimate text messages...and she's sharing them exclusively with INSIDE EDITION.

On the night she says they had sex at the St. Regis Hotel in a suite she wrote, "wow ur scared"… meaning he was afraid to reveal his real name. He replied…"not really" and "wow ur tough."

"Why are you sending him a message saying, 'wow ur scared' ?" asks McInerney.
"To see me because for whatever reason he's not giving me his real name, not telling me who he is."
"The texts I see here are 'wow ur tough' and 'wow ur scared,' I don't see much proof here," says INSIDE EDITION's Diane McInerney. "How do I know these messages are from Josh Duhamel"
"Because his number is on there," Forrester says.

INSIDE EDITION traced the number that the text messages came from. The number was no longer in service. It appears to belong to a prepaid, disposable phone bought in Beverly Hills, so its owner is not listed. Still, Forrester insists she's telling the truth and even took a polygraph test, administered by The National Enquirer. The results were "no deception detected."

"Josh Duhamel says you're lying," says McInerney.
"He's lying, let him take a polygraph and pass it," Forrester says.

Meanwhile, Duhamel and Fergie, in Atlanta where Duhamel is filming a movie, went on a date night, looking very much like adoring newlyweds. They went to dinner at a restaurant right next door to the hotel where Nicole Forrester claims she had sex with Duhamel.

Fergie also gushes about her new husband in the latest issue of Cosmopolitan, saying he was excited when she put on a few pounds for her role in the new movie Nine.

Nicole Forrester claims Josh Duhamel was desperate to save his marriage, and pleaded with her to keep their night together quiet.

"He was like, 'Hon you have to deny that you ever knew me,' " she says.
"What did Josh Duhamel tell you about his wife?"
"That he does love her, or whatever," Forrester says.
"What do you want to say to Fergie?" asks McInerney.
"I'm sorry, I didn't mean to break up her family, I didn't mean to break up her life; that was never my intention."