[F4M][script request][bareback][neighing][Beast] Mare for Me

My request is that a rancher finds out his best horse (who is a mare) turned into a human woman form (because of a wish he made) and fears she will be of no use to him anymore. However, the rancher showed she can be a very close partner than she has been before.

Then, after the sex, the woman feels something happening, it almost feels like she was turning back into a horse. But she willed the change to not happen. She then realized she can control the change from human to mare (and vice versa) whenever she wanted. She could still be his devoted mare, but right now she wants to be his devoted girl. She giggles, ready to be 'ridden' again.