The New York Times reports that the Petraeus affair has been known about since the summer:
WASHINGTON — High-level officials at the Federal Bureau of Investigation and the Justice Department were notified in the late summer that F.B.I. agents had uncovered what appeared to be an extramarital affair involving the director of the Central Intelligence Agency, David H. Petraeus, government officials said Sunday.
But law enforcement officials did not notify anyone outside the F.B.I. or the Justice Department until last week because the investigation was incomplete and initial concerns about possible security breaches, which would demand more immediate action, did not appear to be justified, the officials said.
The new accounts of the events that led to Mr. Petraeus’s sudden resignation on Friday shed light on the competing pressures facing F.B.I. agents who recognized the high stakes of any investigation involving the C.I.A. director but who were wary of exposing a private affair with no criminal or security implications. For the first time Sunday, the woman whose report of harassing e-mails led to the exposure of the affair was identified as Jill Kelley, 37, of Tampa, Fla.