Orgasm - Challenge! Who will cum first!

I challenged my girlfriend to an orgasm challenge! Which of us manages to climax first? The loser buys the winner a sinfully expensive dinner. Of course, neither of us wanted to be the loser and we put the pedal to the metal. Our cunts are leaking so much and we get it on in every conceivable position. But then something happens that neither of us expected!!!! What exactly? Check it out....but don't tell us in the comments, we want to keep it exciting :)