Jenny spent the entire night hiding in the forest.sometimes she was very tempted to go into town and turn whatever into a new dick for her, but she could resist and masturbate whenever that happened, which allowed her to keep control for a while longer, which it was more and more difficult.
When morning came, Jenny was not only still fighting Itch, but she was also starving. She started walking through the woods looking for something she could eat and found some fruits that served to satisfy her. She also found a stream where she drank the water.
With her thirst quenched, the futa prepared to reenter the forest when Itch attacked again, stronger than ever. She didn't know how long she could live like this. She sat on a nearby rock and had barely begun to masturbate when a mare walked past her and stopped by the riverbank to drink some water. Soon after, she went to a nearby lawn and began to eat.
With Itch clouding her rational thinking, Jenny started to think it would be a good idea if she fucked the mare. She then reached behind the animal, careful not to be noticed and climbed onto a rock close behind and quickly thrust her hard cock into the mare's pussy.
The lost mare, frightened by the sudden attack, started to jump madly trying to take down her attacker, but Jenny held on with all her strength not to be knocked down until the animal gave up on knocking her down.
Jenny no longer cared if she was fucking a human or an animal, she just thought about cum inside a pussy and continued to fuck the mare until she finally came.
After the orgasm her rationality returned and she realized what she had done. Jenny tried to get out of there immediately, but she couldn't because the mare's ass had merged with her.
"What is this? Does Itch work with animals too? Will this mare become my dick?"Jenny wondered, but she realized that the mare wasn't changing at all and she was being absorbed by the animal's body. She tried to free herself in vain as her hips and legs were absorbed by the animal's body until only the top half of her body was left attached to the mare above her ass.
In the hours that passed after that Jenny couldn't do anything else, she was merged with the mare and had no control over the animal or feeling what the mare felt, all she noticed was a mark that indicated that the mare had owner and who had probably escaped and got lost in the woods. All this time she also noticed that her body was moving further and further in front of the animal. When her belly touched the mare's neck, the animal's head was slowly absorbed by the body while what was left of the futa's body took its place, as this happened Jenny noticed that not only could she feel more and more of the animal's body as part of her, but she also gained more and more control over it. In the end Jenny had become a centauress and had the mare's body as her lower half.
Jenny took a few laps, learning to control the body of the mare that now belonged to her, as well as how to walk on all fours and control her tail. As she did so she felt something swinging between her hind legs and bent down to see what it was, and found a sheath of her new horse dick and her new ballsack, who was now sure she was a futa centauress.