At the time, Mahoney's campaign ads featured a picture of him with his wife, Terry, with the line, "Restoring America's Values Begins at Home."
The staffers say Mahoney first met Allen at a campaign stop and later arranged for her to work as a volunteer on the campaign. Allen also appeared in a Mahoney campaign television commercial, criticizing his opponent.
Following his election in 2006, Allen was hired, at taxpayers expense, to work on Mahoney's Congressional staff in Florida, at a yearly salary of $36,000.
After complaints about the affair circulated in Washington, Allen was moved to the campaign staff, the staffers say.
Friends of Allen told ABC News that Allen sought to break off the affair when she learned Mahoney was allegedly involved in other extra-marital relationships at the same time.
Her friends say she told them Mahoney threatened that ending the relationship could cost her the job.
"You work at my pleasure," Congressman Mahoney told Allen on a January 20, 2008 telephone call that was recorded and played for Mahoney staffers. ABC News was provided a copy. Click here to hear the tape.
"If you do the job that I think you should do, you get to keep your job. Whenever I don't feel like you're doing your job, then you lose your job," Mahoney can be heard telling Allen.
"And guess what? The only person that matters is guess who? Me. You understand that. That is how life really is. That is how it works," Mahoney says on the call.
"You're fired," Mahoney tells her. "Do you hear me? Don't tell me whether it's correct or not."
Allen says, "Tell me why else I'm fired."
"There is no why else," Mahoney responds.
Later, Allen says, "You're firing me for other reasons. You don't, you're not man enough to say it. So why don't you say it."
The portion of the tape provided to ABC News cuts off when the two begin a profanity-laced argument.
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