Mike spent the afternoon in his room, surfing the Internet and doing sit-ups and push-ups. The voice was relentless, badgering him to run downstairs, grab any one of his sisters and just start fucking. He could resist when he wasn't turned on, that he was sure of. It was when his sisters were tormenting him, bending over without panties, rubbing up against him or kissing each other, that he had difficulty dealing with the voices proddings.

It looked to be just a matter of time before he acted out one of the voice's commands, thus losing the bet in the process. He sincerely hoped he could make the two weeks,...