Jack smiled burned with malice as he looked over both his victims. "As much as I want to start playing with you Rachel, I have another pet I have to finish first." He turned to look over his shoulder at the naked girl on all fours behind him, cowering and hoping to disappear. "After all, I don't like to leave a job half finished."
The ring began to glow and Ellie began to feel warm. "Please No! Help Me! Rachel! Make him stop!" She screamed. Rachel could only stand and watch as her sisters torment began. She could hear Jack laughing but she could do nothing from within her own cage.
Ellie could feel the tingling along her spine, starting from around where her tail began. She shivered and turned her head over her shoulder to see the fur growing along her back. She could feel the hairs growing around her petite ass, her tail hanging low now. Her attention was suddenly drawn to the warmth now accumulating in her hands. She looked down at the rippling in the shape of them, as she tried to sit back to remove the weight on them and picked one up to look at it closely. Her slender fingers now were fattening and a layer of padding appeared below her palm. She sobbed tears of panic as she watched her hand slowly transform into a dogs paw.
"Please stop!" she begged as she looked towards Jack.
"Ahh, poor Ellie. If I stopped now you'd be left as a half dog freak. Better to just get this over with so you are at least one species."
Rachel slammed into the cell and reached to grab Jack, who was sadly still out of reach. "You monster!" She screamed. "Stop This! Turn her back!"
"Oh Rachel. Just look how beautiful she is. She's beginning to match her bitch sister!" He laughed in return as she spat her disgust at him. He looked back to Ellie to continue watching. "Better get used to those paws Ellie. Everything that's happening to you will be your life from now on." Her eyes began to stream tears as she looked up at him, weeping. "You're going to be a dog Ellie! For the rest of your life!"
Jack laughed hard, as Ellie continued her transformation. Fur now covered her front paws, and her hind legs now looked similar in coverage. Her bones were beginning to shift as the fur crept higher across her limbs. Her ass and lower back were completely covered and Rachel could see the shape of her sister beginning to morph. Her screams for help were becoming more frantic, but there was nothing anyone except Jack could do, and from the look of glee on his face or the tent in his pants he was unlikely to stop now.
Fur crept along her stomach, and Ellie could feel her breasts beginning to deflate. She tried to grab them with her new front paws, maybe hoping to hold onto them, but the melted away slowly and defiantly. New sets of nipples were evident under the fur down her front. And Ellie now fell forward onto her paws, stretching to alleviate the pressure on her back. Rachel could now see that besides her head, which still sported the dog ears of before, her head was the last part of her sister that remained human. Everything else was now completely dog.
Ellie cries now turned into yelps and howls, as her vocals finally succumbed to the transformation. Rachel watched as the fur continued its relentless growth, now covering her entire face, which began to ripple and expand with the beginnings of a muzzle. Ellie's tongue lopped out of her mouth, as her nose became darker. Her hair shrank slowly until it matched the length of the fur, and with a final cry as she placed a paw on her new muzzle, the full transformation was over.
Rachel could only stare helpless into the eyes of the dog that was once her sister. The beautiful German shepherd, whose luscious fur matched Ellie's hair, sat on its haunches staring back at her, Jack all the while laughing at the poor girls misfortune. Ellie's eyes though. Despite the transformation, the dog still had Ellie's eyes. Her sister was still there, pleading with those blue eyes for her sister to save her. But there was nothing Rachel could do. She was as trapped and helpless as Ellie. Jack claimed that Ellie's transformation was permanent, that her sister was now a dog for the rest of her life, and for all the power Jack had, Rachel now believed him.