About an hour after the new Mr. and Mrs. Perth left on their trip, the original Mrs. Perth arrived home. She was excited as her husband and her were going on a trip and she was going to give him the best sex ever. She had just bought some sexy lingerie and it was going to through them in the suitcase to surprise her hubby. She pulled in and got out of the car with her shopping bags. The moment she stepped out of the car she felt pain in her stomach. She dropped the Victoria's Secret bags and she clutched herself. Soon she began to expand and her clothes began to rip.
Her skin started to ripple as fur emerged from her body. Soon her silky smooth skin was covered in horse fur. The shocked farmer's wife tried to scream, but all that came out were neighs as her vocal cords had change. She could no longer speak. She started to cry as she realized what was happening to her. Soon her feet and hands became hooves as her opposable thumbs melted into them. Her legs began to build up muscle as her arms matched her legs. The now four-legged Mrs. Perth has no choice but to go onto four legs. Her ass started to expand as her already ripped shorts fell off exposing her enormous butt. Her panties had pretty much become a thong the bigger her ass got, but soon they ripped off as well. A tail sprouted above her horse rear as her now velvety vagina positioned itself in its new place. Her blouse exploded leaving her completely naked as her beautiful human breasts that were now covered in fur receded back into her torso which had expanded greatly. The last thing to change was her head as her face stretched out and her teeth grew. Her hers moved up her head and her eyes spread out. Her lovely hair became her new mane and what was once a beautiful if aging human being, was now a big fat horse.