"You know" Commented Amanda. "I always dreamed of living in a world were mystical being were real, specially the one those body is composed of the upper half of a human body and a part of another animal. Like lamias, centaurs, mermaids and mermen. Why not use this as a base?"
"You're going to change me into a mermaid, aren't you?" Asked Ty.
"No, I have something else in mind." Answered Amanda, worrying Ty.
"First, I wish that upon reaching puberty, some persons will have their lower body instantly change, making them centaurs, lamias or merfolks. I wish this transformation into mythological beings was rare, but still a perfectly normal and accepted thing." Ty saw his environment changing, adapting for a society with that kind of beings included in it. That didn't stop Amanda from adding "Also, I wish that between Ty and me, I'm the one to have lived that kind of change, making me a centauress." And her legs rapidly changed, becoming a mare body.
Not seeing where was his punishment in that, Ty asked "And where is my punishment in that?"
"It only was the beginning, Ty." Answered Amanda, grinning. "I wish that whatever force made some peoples change into mythological beings, made said beings choose someone about the same age as them, and usually of the same sex than them, giving these chosen ones the sacred task to take care of whoever choose them, creating some sort of mystical link between the two to help with that. But I wish that force made me choose Ty to take care of me, knowing we have a crush on each other, perfect for each other, Ty being the only one for me, and me the only one for Ty."
They both sensed some minor changes in their mind, ensuring this was and will forever be, true.
Then, Amanda crouched herself the horse way, like her centauress body forced her to, before tenderly kissing Ty. "Want a ride home?" She then asked her lover to hop on her saddle. Ty, being both her mate and caretaker, was the only one Amanda accepted there.