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Former CIA Director David Petraeus' mistress, who wrote a biography about the top Army general, openly bragged about future projects with Petraeus as recently as October, Fox News has learned, despite a former Petraeus spokesman's public insistence that the affair had ended four months ago.

Petraeus resigned as CIA director Friday after an FBI investigation of harassing emails turned up his affair with Paula Broadwell, author of the biography "All In."

Fox News' source attended a dinner Oct. 27 at the Washington Ritz-Carlton, where Broadwell was talking up the future projects.

“She said that they had two book ideas they were pursuing, and they hoped to publish again sometime in the next two years,” Fox News' source said.

The annual event is hosted by the Office of Strategic Services Society, which, according to the event flyer, “celebrates the historic accomplishments of the OSS during World War II – the first organized effort by the United States to implement a centralized system of strategic intelligence.”

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After the dinner, Fox News was told, Broadwell appeared confident and at ease while mingling with guests, hardly the portrait of a women who was deeply shaken by the end of an affair.

“She was elated, beaming that night," the dinner attendee told Fox News. "She was having her picture taken with guests. She would disappear for a few minutes and then return, very much enjoying the attention.”

The source who attended the event was struck by how openly Broadwell spoke about Petraeus, adding that she seemed to have personal insights about the CIA director: “She said he was unsure of himself sometimes. She said he was concerned about the public’s perception of him.”

No criminal charges have been filed, and Petraeus had planned to remain as CIA director, thinking the affair wouldn't be made public, the Washington Post reported. That all changed last week.