Cat shivered and quaked uncontrollably as the sweet liquid passed into her mouth. Mary watched with wrapped attention as the thief began to change. It began subtly. Cat’s lithe, trim form became more muscled. Her arms and legs became much more defined, as her hands and feet distorted from their original forms. Cat arched her back and trembled as light black hairs began to spring from her skin. The feeling was beyond anything that the thief had ever experienced or even dreamed.
Mary watched intently as her pet’s transformation progressed. She observed with glee the ecstatic smile upon Cat’s steadily furring face. The thief’s nose upturned slightly as its tip became leathery. Cat’s eyes, which had been tightly closed, shot open suddenly revealing that they had changed from a deep almond to a striking green. Cat’s ears began to protrude from her long, wavy hair. They were rapidly becoming pointed and growing toward the top of her head.
As Cat’s hands and feet shifted into the paws of a predator, the thief felt a rumbling deep in her chest. If she didn’t know any better, she would have sworn she was purring. A rapidly widening smile came to Mary’s face as whiskers grew out of Cat’s cheeks. The thief girl’s teeth were becoming sharp and her mouth pushed out into a distinctly feline muzzle. Mary felt a particular thrill when Cat raised her buttocks into the air, prompting her coccyx to extend. In a matter of seconds, a small nub grew into a long, supple tail. The hairs on Cat’s body filled out into a velvety soft coat of fur as the transformation came to its conclusion. Where once had knelt a beautiful thief girl, now a magnificent panthress sat at the foot of her Mistress.
Mary could barely contain her excitement. Not only did her first test of the vials prove to be a success, but she now had a majestic pet to serve her during her ascension to goddess-hood.
“Wonderful, my pet,” Mary declared as she rubbed Cat’s head and behind her ears. The she-cat murred her feline surrender, rubbing her face against her Mistress’ hand. “Now,” Mary commanded, “arise.” With that simple imperative, Cat’s ecstasy returned as she felt another change occur. Her quadrupedal form gave way to one of a humanoid-panther, and then back to a nearly completely human shape. As the transformation reached its conclusion, Cat stood before Mary, completely naked but for the collar around her neck. Cat was nearly herself again, but for a few bestial vestiges of her new form. Her incisors were slightly longer than they had been, giving her the appearance of fangs. The nails on Cat’s toes and fingers were sharp and claw-like. Her ears now had slight points, and her eyes remained the piecing green eyes of a panther. Finally, her pubic hair, which had been expertly shaved, had grown into a thick pelt.
“You are going to be my second, my pet.” Mary stated, tightening her grip on Cat’s leash, making sure she had the thief’s undivided attention. “I have granted you the ability shift between panthress and human forms at will, or as you have experienced, at MY will.” Mary pulled the leash, bringing Cat’s face close to her own. Unable to control herself any longer, Mary gave Cat a deep, passionate kiss. “I know you don’t have scales, but I hope you approve…” Mary chided her pet with a wry smile. Cat smiled, and obediently dropped to all fours before her Mistress.
“I’m very happy, especially if it pleases my Mistress.” Cat purred. Mary smiled again, rubbing her pet under her chin. “Perfect. Now which vial shall we try on Jess, my pet?”