Jill Kelley Reveals Untold Details Of David Petraeus Mistress Scandal

Jill Kelley, the woman whose reporting of harassing emails she received cost CIA Director Gen. David Petraeus his job, sat down for an exclusive interview with ABC News' Juju Chang, speaking out on the scandal.

The 40-year-old's reports of a stalker spurred an FBI investigation, which traced incoming emails to the computer of Paula Broadwell, Petraeus' biographer.

When news broke of the affair, Petraeus quickly resigned from his post.

"I saw him break down, and he immediately looked at me in the eyes and said, 'It's Paula Broadwell,'" Kelley recalled of a conversation she had with Petraeus at the time.

But Kelley said the harassing "did not go to us at first."

"They initially went to the generals and General Petraeus, or Director Petraeus and another ambassador and then they came to my husband on my birthday," she told Chang.

Kelley's self-published memoir, Collateral Damage: Petraeus, Power, Politics and the Abuse of Privacy (The Untold Story), uncovers more details of the ordeal, as well as a scandal involving Marine Gen. John Allen, the commander of U.S. and NATO forces in Afghanistan, who ultimately retired from his position as well.

"I actually felt sorry for David," Kelley said. "In his defense, he was in a difficult situation where he had a very unhappy ex-girlfriend and the most amazing job in the world, and friends who were now being stalked."

As reported last year, Petraeus was sentenced to two years' probation and a $100,000 fine after admitting that he leaked classified information to Broadwell.

Petraeus and Allen both declined to comment. Broadwell did not reply to ABC News.