Jenny was the eight year old girl next door. She walked up to her house's front door and was about to open it when she noticed a sticky note. She took it off and read it aloud. "I wish that I would switch genitals with my opposite-sex parent, and that the new genitals worked perfectly and aged normally as if they were still attached to the original, but both of us grew as if we had our original genitals."
Disgusting. She walked into the house and shut the door when she noticed a strange sensation in her pants, they had all of a sudden gotten rather tight. She looked down and noticed a sizable bulge on her crotch and then remembered the note. She raced upstairs hoping that no one would notice her, she was lucky they didn't. She locked her door behind her, a regular occurrence, and took off her pants and panties.
There they were, her father's genitals. "Oh my god." She whispered to herself and sat down on the bed. She look at them, the cock and balls, a dark color against her creamy skin, they were absolutely massive on her. She reached down a dainty hand to touch them, they reacted quickly. She hadn't known her father to be a large man, but his cock was huge, it stood proudly upon her frame, a stiff twenty inches. It shook as it thumped in quickening demand for release.
She touched it again, her hand wasn't even big enough to span its mass on top, it felt good though. She began to rub her new cock, stroking faster and faster in growing arousal. She hadn't known such bliss before and was lost in it now. Suddenly she felt something hot come up through her massive shaft, she cam, a load of sperm that could fill a large bowl blasted out, shaking her whole body. She panted as she watched her new mass grow flaccid, huge even at rest it was.
"No wonder mom's so happy all the time." She said to herself.
