I agree. Congress is not going to pursue anything that involves Petraeus adultery.
Also, the military won’t pursue anything that their commander in chief tells them not to pursue (or their secdef/secarmy/cjcs/Chief of Staff Army.
The Adultery is a Red Herring. It is a deflection from the cover up. The cover up of Benghazigate is the scandal. This confession and his resignation over charges of adultery is just designed to deflect the nation from the real issues, i.e, just what the hell was Stevens doing in Benghazi and why didn't the CIA, the Military or Obama do anything to rescue him?
Patraeus is hiding something underneath his adultery scandal. Something much more sinister than any sexual affair.