Sari Horwitz, Kimberly Kindy and Scott Wilson
Washington Post 
Nov 13, 2012
…some of his closest advisers who served with him during his last command in Iraq said Monday that Petraeus planned to stay in the job even after he acknowledged the affair to the FBI, hoping the episode would never become public. He resigned last week after being told to do so by Director of National Intelligence James R. Clapper Jr. on the day President Obama was reelected.
“Obviously, he knew about the relationship for months, he knew about the affair, he was in it, so yes, he was not going to resign,” said Peter Mansoor, a retired Army colonel and Petraeus’s executive officer during the Iraq “surge,” who spoke Monday with the former general for about half an hour. “But once he knew it was going to go public, he thought that resigning was the right thing to do. There is no way it would have remained private.”
Steven Boylan, who served as Petraeus’s public affairs officer during that same period in Iraq in 2007 and 2008, said the retired four-star general “felt he had to [resign] once he knew it would be made public. He didn’t feel he could lead the organization with this being out there.”
A more detailed timeline of the events that upended the career of one of the nation’s most accomplished military officers emerged from interviews with former Petraeus advisers, people close to Broadwell, law enforcement officials, and people close to Petraeus family friend Jill Kelley, who received harassing e-mails from Broadwell.