BATON ROUGE, La.-- A former New Orleans prostitute who says she had an affair with U.S. Sen. David Vitter passed a lie detector test and will provide details of the four-month relationship on Tuesday at a press conference in Beverly Hills, according to publisher Larry Flynt.

(AP Photo/Bill Haber)

Sen. David Vitter.

Wendy Cortez alleges she had a sexual relationship with Vitter, R-La., in 1999 when he was a state representative in Louisiana's Legislature.

Flynt asked Cortez to take a lie detector test about the allegations after Vitter admitted links to a Washington escort service that federal prosecutors claim was a prostitution ring but denied having relationships with New Orleans prostitutes, according to a news release Monday announcing Flynt's press conference.

Copies of the polygraph test results for Cortez, whose real name is Wendy Ellis, will be provided to reporters, arrangers of the press conference said.

Vitter spokesman Joel Digrado wouldn't comment on the Flynt press conference. In an e-mail, Digrado said, "Sen. Vitter and his wife have addressed all of this very directly. The senator is focused on important Louisiana priorities like the water resources bill and the Iraq debate."

Vitter, 46, a first-term senator, apologized in July for committing a "very serious sin" and acknowledged his Washington phone number was among those called several years ago by an escort service run by Deborah Jeane Palfrey. Federal prosecutors accused Palfrey of racketeering by running a prostitution ring that netted more than $2 million over 13 years, but she claims her escort service was a legitimate business.

Vitter's admission came after Flynt's Hustler magazine told the senator that his telephone number was linked to Palfrey's escort service.

The senator was not charged with a crime.

(Copyright 2007 by The Associated Press. All Rights Reserved.)