I thought she broke off the affair prior to September 2011. Wasn’t this letter to the NYT more recent?
http://online.wsj.com/article/SB10001424127887324073504578109252422213868.html?mod=wsj_share_tweet
While Mr. Petraeus was still a general, he had email exchanges with the woman, but there wasn’t a physical relationship, the person said. The affair began after Mr. Petraeus retired from the Army in August 2011 and ended months ago, the person said.