Magnus had other plans though. As James now weight over double his previous weight, Magnus was in protest and shook James off of his back, causing him to fall into the pond water that ended up splashing the water all over Magnus as well.
James writhed as the water took effect, reducing his muscles in his upper body to almost nothing outside of having back strength which didn't physically show. With newly petite arms and frame, James felt himself start to soften and his skin clear of all hair and turn fair. His hair grew out and down his back in long wavy locks, and his chest pushed out into an ample pair of breasts, both of which were at least as large as his head, if not larger.
Then his face turned feminine. If anyone saw it, he would easily be considered one of the prettiest women in the kingdom from the face alone. But the changes weren't finished. A pair of golden fur covered horse ears sprung up out of the top of her head, replacing her human ears completely.
She felt her legs cramp, then break apart into two, as her ass pushed back, extending into a full sized second torso and legs, which all became coated in golden horse hair. His new lower body quickly became much more equine in shape, sprouting a long golden horse tail in the process. Her four feet turned black, and reshaped into hooves as well. Again, new memories flooded into her mind. She was the first centaur princess Jazmin, both the fiance and official mount of the Kingdom's first Prince, Prince Magnus.
While their engagement was one based more so on forming a political alliance between their respective races, it didn't stop them from actually falling in love. Princess Jazz looked around as she got onto her hooves and stood up out of the water. She saw her Prince standing there dumbfounded near the bank of the pond, completely naked except for her saddle which was on the ground behind his legs.
Jazz couldn't help but blush at the sight of Magnus' uncovered cock as her pussy began reacting in kind. She knew he was more well off than other humans, but even now the sight of it still gets her all worked up. Magnus finally came to his senses and attempted to covered his horsecock to no avail. Jazz chuckled and collected her saddle from the ground before lifting him onto her back with relative ease. Sure he stood at most, breast high when compared to her, but that didn't matter to Jazz.
After making sure the saddle was properly fastened this time, she reattached the reigns back onto the pair of nipple rings she now had and tossed them back over her head. Magnus caught the reigns and gave them a whip, causing Jazz to moan in pleasure as the sudden movement carried through the reigns and into her nipples. She immediately took off running, not caring where she was headed. It wasn't her call to make. She would just let Magnus drive her like he always has.
Magnus, an hour of running finally let them exit the forest and enter the hilly plains outside of the kingdom's capital. They stopped in a small village and bought some new clothes for Magnus. Jazz didn't want any, since centaurs didn't wear clothes, but Magnus insisted on at least a top or something. She settled on just a large red bow for her long hair, which was then tied into a sexy crown braid and held in place by said bow so it would stop hitting Magnus in his face as she galloped.
They soon after left the village and continued heading towards the capital.