You 'fess up

"I...," your breath catches as you try to tell him the truth. You gulp, conscious you are about to tell a guy with his dick nestling in to the mouth of your pussy that, in fact, you were a guy, and that just hours earlier rather than having between your legs the pussy he was now, apparently, desperate to pillage, you had enjoyed your own swinging dick...

He waited

"...I am actually a guy. I took a pill to come here tonight."

There. It was done. Your secret was now at his mercy. As your mind scanned the possibilities, you felt the muscles just behind your pussy lips involuntarily spasm around his throbbing cock.