Mary carefully measured the contents of the vials. What had she used? A half vial of dog, half of the eagle, half of the human vial and just a little bit of monkey. And of course, a whole vial of the female potion. She was careful to exclude the muscle and growth potions. She didn't want to boy to get bigger than her. She wanted to stay the Alpha, and keep the party under control.
The girls watched her eagerly, and cheered when she said it was ready. John's eyes went wide as she approached him with the cup containing the mixture of vials. He shook his head wildly.
"Drink! Drink! Drink!" the girls chanted wildly.
Mary removed the gag and pinched his nose. John held his breath for as long as possible. But eventually he had to gasp for air, and Mary poured the mixture down his throat. The girls watched him with fascination, eagerly awaiting his transformation.
John gagged, trying to spit up the mixture. It didn't taste bad. It had the flavor and texture of bottled water. But he had no idea what the demon monster intended. He doubted it was good. It was probably some kind of poison. The monster had even tricked his sister into aiding her.
He continued to gag, trying to form words, pleading for his sister's help. But his words sounded strange almost like the caws of bird. His jaw ached, and suddenly stretched forward into a yellow beak, pushing his lips back as it grew. John was in silent shock, but the girls cheered as he began to change. White feathers sprouted from the top of his head and down his chest. His lower half grew dark black fur. His hands and forearms were covered in tough yellow skin. His nails grew long, sharp and black. His feet stretched into paws, ripping out of his shoes. Long dark claws extended from his toes. He felt a pressure at his back, as a long prehensile tail quickly grew from his tailbone. His body swelled a bit, and he broke free from his ropes. As he stood, two large wings erupted from his back, ripping off his shirt. With a shock, he saw two large mounds of flesh slowly rising beneath the feathers of his chest. His saw that his stomach was flat, and his waist was thin. His pants were torn off by his widening hips. The girls giggled at the sight of his small penis. He covered it with his talons, but it soon disappeared into his newly formed vagina. His testicles soon followed, changing into a set of functioning ovaries. Finally, the transformation was over.
"You bitch! What did you do to me?" yelled John.
Mary wagged one clawed finger at him. "Tsk, tsk. There are children here, young lady. I would watch my language if I were you. Especially if I wanted to be changed back later."
John brightened a little. "You'll change me back?"
Mary smiled coyly. "Maybe. If you are a good girl. Now why don't you join us? The girls have an excellent tea party prepared just for us."
John scoffed. "A tea party?" said John with disdain.
Mary glared at him. John quickly took the hint.
"Yeah, a tea party sounds great. Let's go," said John.
"Excellent, " said Mary, as she looped her arm through John's arm, and lead him outside. "C'mon girls. Let's have some fun. The day is wasting."