As she walked along the sidewalk, cigarette held negligently to the side, Jon reflected upon how profoundly satisfying her new life was. Much better than the boring nerdy existence she used to lead.
Waiting to cross the road, her crotch itched slightly. Jon frowned. It wouldn't do to catch something - this would interrupt her cash flow, and interefere with the vigorous fucking that made the job so worthwhile.
But then she realized - why worry? She had the stone right there. She could protect herself.
"I wish that I'm immune to all STDs." said Jon. The stone flashed. The itching faded away.
Pleased with herself, Jon smiled. But why stop there. "I wish only to fall pregnant only when it suits me." Not that the thought of a little brat was appealing, but why preclude a bit of gold-digging?