"I'll walk.", Jen decided. "Everyone will have gone to work, or school, so there will be no one to try to screw me."
She left her house, wearing a t-shirt that barely held her large breasts back and a long skirt which she used to try to hide her dick. She tried to walk, but she was still aroused from earlier, so her erection made it uncomfortable. "Dammit, why is it still hard?!", thought Jen. She kept walking, keeping an eye out for anyone. After she was about a block away from her house, she turned a corner and reached a house with a dog lying on the front lawn. It was a golden retriever. It was chained to a post. "A dog?", Jen thought. "Hmmm... Looking at it makes me feel... strange..." Suddenly, the dog awoke and made eye contact with her. "Huh? What's this feeling?" Jen began to shake, as the dog stood up and tried to run toward her, only to be pulled back by the leash.
The dog growled, as it began to grow larger. Its body became about the size of a human, but it retained its dog-like shape and features. Its nipples grew and 4 pairs of B-cup breasts appeared on the dog's underbelly. It continued to try to run at Jen, pulling on the post. Jen looked at her hand, as it began to grow fur. Golden fur appeared all over her body (but her head kept her red hair, in the ponytail hairstyle she had). Her nails became thicker, becoming claws. Her face extended outward, giving her a doglike snout. "AHHHH! I'm some kind of freaky dog thing!" The dog barked at her, but, in her new form, Jen understood the dog perfectly. "Hey! Mate with me! Now! I'm in heat!" She sounded like a girl, and she sounded horny. Jen tried to run, but she was being controlled by her new canine urges.
Jen pounced the dog and began to fuck her. Passersby who witnessed the two human-sized dog creatures mating considered it to be normal. After several minutes, Jen stopped. Her fur disappeared, her nails became shorter, and her face changed back. The dog, however, did not. Her stomach did seem to swell a bit, indicating that she was pregnant with Jen's pups. Soon, several hermaphroditic dogs would roam the neighborhood.
Jen stood up, dusting herself off. "I hate this so much!", she thought. "Am I going to have the urge to fuck every dog I run into?" She looked at her watch and realized that school was about to start. She ran as fast as she could to school, which was now difficult because of her erection and her extra-sensitive breasts.