When they had gone far enough into the woods where Sonya was sure nobody would ever find them, Sonya pulled on Darlene's reins and brought her to a stop.
"You coul haff jufft ffaid 'Okay, fftop!'" Darlene huffed through the annoying bridle.
"Where's the fun in that?" Sonya giggled. She dismounted and then magically wished Darlene's harness and saddle away, letting the graceful centaur free. "Is that better?"
"Much," Darlene said, rubbing her jaw. She could still feel a phantom pressure from the bit on her gums.
Sonya reached up and took the collar off Darlene's furry neck.
"Hey, wait! What about me?" Darlene asked.
"You've had plenty of time with this thing," Sonya said, putting the red collar around her neck. "Now you get to have your way with me for a while."
"You're unbelievable, you know that? This is insane."
"But it's also crazy fun."
Darlene had no counter argument. She shifted her weight among her four hooves and twitched her tail and ears in irritation. What they had experienced in the last twenty-four hours was like a never ending dream. She felt conflicted between changing back to a normal guy, and continuing to change into fantastic creatures. She couldn't make up her mind, but the absence of the collar around her neck made both decisions unattainable, for the moment.
"I don't like being a horse. There's...too much of me."
"Then I dare you to have some payback," Sonya said with fierce eyes. "Come on, do your worst. Change me."
Of the many things Derek/Darlene loved about Sonya, her strong will and passion were at the top of the list. Ever since confiding in her about his transformation fetish, Sonya had opened up and shared her wildest fantasies, which surprised Derek with how close they were to his own. Together they had imagined worlds and lives neither could have created alone. And now here they were, forging new experiences in reality.
Darlene shut her eyes and concentrated on a form to give Sonya that was appropriately unexpected but not unpleasant. At least...not totally unpleasant.
"All right, Sonya," Darlene said, having finally come up with an idea. "You asked for it..."