"Well, uh..." Derrick turned red again, wanting to ask for the sexual enhancement but feeling silly and childish. Dianna chuckled and began to rub his crotch again. "It was a trick question. All men want to have enhanced sexual capability." Then she suddenly shoved Derrick under the water with her other hand! He tried to cry out, but then his head was below the surface and he had to twist away and jump back up with a gasp. "Hey! Why did you do..." He stopped and swayed, his voice different, deeper, and his head feeling too heavy.
Confused, Derrick shivered as a muscle spasm rippled through his chest and arms, and then traveled down his back to his legs and feet. A moment later he gasped as his penis came painfully erect, throbbing with need. As the water around him stilled, he caught sight of his reflection and froze. It looked like he had antlers! Reaching up, he felt the bony protrusions from his skull, gaping as they grew out and split. His face matured a lot, moving up to late teens, and then early twenties in seconds, even as it started to deform. His lower face was thrusting out, forming a muzzle, and when he tried to scream it came out as a grunt.
Dianna stood back and grinned as she watched him transform. "Ah, lovely! You will be a 12 pointer at least!"
Twelve pointer? What was she talking about? Derrick was terrified, his body twisting and swelling out. He could smell his own fear, a rank musky odor combined with maleness, strength, virility. That did not make sense, but nothing made sense to the changing boy. He could not scream, making odd bugling noises and grunts instead. New scents filled his nostrils, females, some in season. He fell forward, catching himself on his hands - forehooves? As quickly as they had started, the terrifying sensations stopped. It took a moment for Derrick to calm down enough to think, and when he did he saw his reflection and nearly panicked again.
He was a stag. The biggest stag he had ever seen, with a massive rack of antlers and a thickly muscled body. Dianna move next to him, now looking much smaller compared to his new massive size. She ran her hands over his back and size, feeling the power and strength. "Oh, yes. You are the finest I have ever created. Sixteen points! Very mature and experienced, the king of the forest!"
Derrick trembled under her touch, slowly understanding the impossible truth. She had turned him into an animal! A fully grown stag, apparently much older comparatively than he had been as a teenager. This was no adolescent stag - he was in the prime of his existence.
"Not what you expected?" Dianna laughed again and moved forward to cup her hands under his muzzle. "The fastest runner, the highest jumper, and certainly the most sexually prolific of any stag in the forest." Her smile became cruel. "Remember it, stag. Beast. Animal." Each word was like a hammer blow, and Derrick flinched as his mind seemed to break apart. "You are one of the creatures of the forest now, never again to walk on two legs, to speak, to be human. Know your place, stag!"
Derrick was bombarded by a whirl of new memories, images, instincts. He knew the scents around him, had hazy recollection of running through the woods, of mounting females, of seasons grazing. The stag body felt normal, even though he still remembered being human. He was... a stag. Hard as Derrick tried, he could not break free of the animal mind that was taking over. Human memories were fading, and he felt the stag overwhelm Derrick, the boy slowly absorbed into the beast. Yet he did not lose all - he knew he had been human, remembered all the potential he had been stripped of. And then he remembered another reason to tremble. Dianna was he Huntress, and she had a bow and arrows under the tree. Some of the memories she had implanted included running for his life as she hunted him!
Dianna stepped back. "Go, stag. I give you time to fill the does with your seed, to enjoy the sexual prowness you craved. And when I m ready, I will hunt you, kill you, and eat you. Your head will join the hundreds of others on my wall. Perhaps I will give you six months. Maybe a year. And who knows? You might even escape me completely and live out your life - which will only be five or six years for a such a mature animal as you." She laughed. "RUN!"
Derrick bolted suddenly, driven by animal instinct and terror, bounding out of the pool and into the protective forest.