This "caught off guard" scenario may have happened, however, you are correct. Lynch does not get a pass.
She should have refused to speak to Bill Clinton. Not only is his harpy wife a target of a criminal probe, but so is he.
The Clinton Crime Foundation is also at the heart of the FBI investigation. Trump was entirely correct when he said Bill and Hillary sold their offices for access, many of them foreign governments. This is bribery, treason, and racketeering all rolled into one.
Lynch is hyper-partisan, and is protecting Obama from his crimes. By doing so, Lynch has committed her own crimes, including obstruction of justice.
I am not sure if any of these vermin will receive justice while on this earth, however, I know they will be held accountable by God for what they have done.