Jill's mother realized how unfair she was being to Jeff, who had only wanted to experience something different for a weekend. "I can't be too selfish, now" she said to herself as she aimed the device at her now-swollen abdomen. "But what should I do?"
She wanted to bring Jeff back, eventually, but she also wanted another daughter, and there was pretty much no way that Jeff would agree to become and stay a girl. Finally, it occurred to her that there was in fact only one way to satisfy her desires.
She fired the device and felt a sharp pain in her pregnant stomach as it began to shrink away, to 7 months, 5 months, 3 months (she was barely showing at this point), and back to normal. She knew that deep in her uterus the newly fertilized egg that contained her son was waiting for her. She pointed the device at herself once more and activated it.
Inside of her, the fertilized egg cell that would one day become Jill started stretching... and stretching...
Until it split down the middle into two identical fertilized egg cells. "Congratulations" she thought to herself. "You're going to have twins."