There's a knock at the door - "GIVE ME THAT FUCKING TAPE, MOTHERFUCKER!" He's oblivious to having been quite literal. You flash back to the hour before when as the whore was walking out she said "oh by the way I hope my boyfriend never finds out about where the extra money came from, because "he's kind of a jerk". You just put two and two together.
Now it's your move. "WHAT DO YOU DO?"