The two of them looked at each other and said in unison "We'll race each other"
I wished that they were centaurs and the changes began.
Ohh yes, I am certain that I will!” I cried as I began to undulate in strong jerking movements. I could not control the undulations and they grew stronger and stronger. I looked down and saw my sex emerge from where it was hiding in my tale. It began to grow dark in color and became very thick. It a few moments it took on the look of a horse’s unit.
“Amanda, are you making me a horse?” I panted as another wave of pleasure hit my body, now in the beginning stages of transformation.
“I’m not saying, but I like the results so far.”
<Amanda's POV>
My tale began to bubble. It began to look like putty as it lost it fish appearance. I was no longer a mermaid but I was not what I was to become either. I was also not undergoing a human to what ever transformation but a mermaid to whatever transformation. My whole body was on fire. The feelings were so great that I no longer cared about what I was becoming.
“Please Joey, I need to hold you, I need to be given relief!!”
I knew from the last transformation that when I actually came that I would complete the change. Joey was transfixed in my change.
“Change now!!” I yelled as my own body began to convulse in a strong climax
And then it happened. I could no longer hold back. I felt the flow of ejaculate pouring from my pulsating sex. But my body, it just seemed to explode into the form of a horse, from my waist down. In less than thirty seconds I had gone from mermaid to centaur.
I found that I had complete control over my four legs, and in no time was I at a fast gallop. I was not winded as I would have been as a human. As I ran I could feel Amanda begin to hump her sex into my back. She was doing what I had read that some women can cum as the ride a horse. This began to excite me so I ran faster.
I looked at Samantha and saw that she undertook a similar change