Here's an intresting video and story on a speech Broadwell made after the attack but prior to the affair coming to light...
Petraeus mistress reveals real motive behind Benghazi attack (VIDEO) — RT
It could be argued that she's revaling too much and some info is/was classified..... wether she knew it or not.... but lets be clear, she is not stupid. She knows whats what.
This quote alone raises questions........“Now I don’t know if a lot of you heard this, but the CIA annex had actually had taken a couple of Libya militia members prisoner,” Broadwell told a crowd at the University of Denver alumni symposium on October 26. “And they think that the attack on the consulate was an effort to try to get these prisoners back. So that’s still being vetted.”
Open secret or not, you mess around AND you have political rivals/enimies, it'll come back atcha.