She became an overnight celebrity last year when she auctioned off her virginity for US$780,000 (S$986,000).
But Brazilian student Catarina Migliorini has alleged that she has been victimised. She also said she has retained her virginity.
Miss Migliorini, 21, said that film-maker Justin Sisely duped and exploited her for his supposed documentary Virgins Wanted.
"I felt I was a victim... I was misled by Mr Justin Sisely," she told US news portal The Huffington Post. "I believe he is trying to defraud me and others."
A Japanese millionaire, 53, identified only as Natsu, won the bid and met the young woman at a restaurant in Sydney.
But she claimed that she did not have sex with Natsu, that he did not cover travel expenses as promised and that he did not match the description provided by Mr Sisely.
She also claimed that she was supposed to get 20 per cent of the documentary sales and all of the money from the auction. But she got neither, she said.
She said that the idea that she would have sex at the end of the documentary was not definite when the documentary was announced in May 2010.
"Justin made me believe this was a serious documentary about young virgins," she was quoted as saying, "and said that there might or might not be an auction at the end of the documentary".
But after Mr Sisely and Miss Migliorini met in Bali, the auction had already been publicly announced.
|Auction: Virgin wanted
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"I agreed to go along with it, because Justin said it would be the best way to draw attention from the media about the project," she said.
But in an e-mail to The Huffington Post, Mr Sisely alleged that Miss Migliorini broke her contract as an actress.
"We have the footage to prove otherwise," Mr Sisely countered. Miss Migliorini, who is of Italian descent, signed up for the project two years ago when she saw an advertisement looking for a virgin to film.
Catarina's move sparked outrage across the globe, with many claiming she was little more than a prostitute.
She also caused controversy when she revealed she would be followed every step of the way by an Australian crew for a documentary film called "Virgins Wanted."
But, she said: "I saw this as a business. I have the opportunity to travel, to be part of a movie and get a bonus with it.
"If you only do it once in your life then you are not a prostitute, just like if you take one amazing photograph it does not automatically make you a photographer.
"The auction is just business, I'm a romantic girl at heart and believe in love. But this will make a big difference to my area," she told Folha newspaper.
Catarina will be "delivered" to her buyer on board a plane between Australia and the US - being interviewed before and after the sexual act.
The intercourse itself will not be filmed and Natsu will retain a right to be anonymous, without his picture appearing in the media.
Sex toys will be banned from use and a condom will be compulsory, with Catarina saying she was prepared to prove to any skeptics that she has not had sex before.
Natsu will be tested for sexually transmitted diseases prior to the encounter.
A male virgin named Alexander, who is also being followed as part of director Justin Selsey's documentary, sold for $3,000 to a Brazilian woman called Nene B.
Catarina previously said she wanted to plough the money - $20,000 and 90 per cent of the final auction price - into a non-governmental organisation that will construct modern houses in her home state of Santa Catarina.
She signed up to the project two years ago when she saw an advertisement by Thomas Williams Productions looking for virgins to film.
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