In April, when Prejean was in Washington to announce her support for the new ad, Keith Lewis, co-director of the California contest, expressed concern to The Associated Press.
"There is a contract that all participants sign that is very involved and very intricate and limits a lot of their activities," Lewis told the news agency.
Prejean's spokeswoman did not respond to questions about the possible breach of contract.
On Tuesday, Prejean said in a statement obtained by The Associated Press that the Web site which posted the semi-nude photo and claims to have others is trying to belittle her religion.
She says the photos, which were taken of her as a teenager, had been released "surreptitiously to a tabloid Web site that openly mocks me for my Christian faith."
In the statement, Prejean also says the attacks on her and others who "speak in defense of traditional marriage" are intolerant and offensive.
She also defended the photos: "I am a Christian, and I am a model. Models pose for pictures, including lingerie and swimwear photos."
NOM President Maggie Gallagher also defended Prejean and said the picture did not disqualify her as a traditional marriage advocate.
"Of course Carrie is not perfect," Gallagher said in a statement Tuesday to the AP. "On a personal note, as a former unwed mother, I want to say to Americans: You don't have to be a perfect person to have the right to stand up for marriage."
Trump also came to Prejean's defense last week. Appearing on ABC's "The View" last Tuesday, he said her answer to the question of gay marriage posed during the televised pageant was not so far off base.
"That's the belief of 70 percent of the people, so it wasn't a horrible answer," he told the women on "The View." "That was her belief and she's taken hard hits. She's more famous because of it. No one is talking about the young woman who won. Nobody knows who she is."
Trump also said, contrary to popular belief, Prejean's answer did not cost her the title. "We went back and added up the scores," he said, "and she would not have won anyway. So that makes me feel better because it was a tough question."
In April, Prejean told NBC's "Today" show that she was going to Washington to work with the National Organization for Marriage, saying the union between a man and a woman is "something that is very dear to my heart."
While Prejean was talking about her values, others were dropping bombshells about her body. Moakler, co-executive director of the Miss California Organization, confirmed to "Access Hollywood" that the group paid for Prejean's breast implants weeks before she competed in the 2009 Miss USA pageant.
"It was something that we all spoke about together," Moakler said referring to herself, Carrie Prejean and Keith Lewis, who also serves as co-executive director for the organization. "It was an option and she wanted it. And we supported that decision."
The beauty queen's family voiced their support for her following the Miss USA pageant.