Again Lucy holds the football for Charlie Brown and the kick isssssssss .....
Announcing a tapes existence, yet withholding its release, is pure genius. hillary knows what she has said, and quite possibly knows that the tape exists. Her days and nights must be agony, which is a good thing.
The objective is for O'Keefe to take up residence inside her head for the next 24 hours. Not just take residence, but take a yuuge, satisfying crap on her living room carpet.
Hence her friendship with the bottle.