"Tim! Would you come down here please!" Jack called out. A padding of paws could be heard a moment later and another dog, a black Labrador, came bounding down the stairs. As if trained perfectly the dog marched up to Jack and sat down next to him. He was a handsome specimen, and clearly obedient, and Rachel's mind began to work over all the possible scenarios that might have occurred.
"Rachel. I believe you've met Tim." Jack said as he looked down at his new pet. Rachel looked blankly at the dog, but then, once again she looked into his eyes and recognised the person there.
"Oh My God! TIM!" she shouted. Jack laughed again heartily and Tim looked up to his master confused.
"That's right! You recognise your former colleague." Tim was the security guard that Rachel reported Jack to when she found his lab. He'd escorted Jack out of the building and taken great pleasure in causing Jack misery proportional to the cruelty of his experiments.
"Tim. That lovely little bitch over there is feeling a little lonely and scared. Why don't you go comfort her." Tim hesitated a moment before he padded over to Ellie, who stood shivering in the corner. Still unused to her new body she tried to back away but Jack was having none of it. With a flash of the ring's light she was unable to move, as Tim approached her. Her whines became more pronounced, but as Tim got near, he briefly nuzzled her. It was a small gesture, but it was something of a comfort, as they looked into each others eyes and realised they were both victims here.
Jack sat down and glanced over to Rachel in her cage, both ready to watch what was to unfold. Ellie was fixed in place, unable to move beyond watching Tim approach her. Tim however was making his way to where he knew Jack wanted him. The smell of the new bitch was starting to affect him, and his arousal was evident in his penis unsheathing itself slowly in preparation for what was to come.
"Tim! Don't do this!" Rachel cried. Her protests fell on deaf ears however as Tim was now committed. Jack chuckled from the sidelines.
Tim reared up and landed with a thud onto Ellie's Back. She could feel his paws digging into her fur, and held the weight strong. She wanted to run, but Jacks magic held her in place, and Tim now took advantage of her helplessness. She squirmed slightly, trying desperately to avoid the inevitable, but Tim only took a few attempt to find his mark. With a yelp from Ellie, he plunged his penis into her doggy cunt. Rachel looked on in disbelief as her sister, now transformed into a bitch, was fucked by another dog, which itself used to be her coworker. She fell to her hands and knees in defeat.
"Oh! Do you want to join in Rachel?" Jack asked turning towards her. Her horror was instantly realised as Jack's ring lit up her vision, locking her in place on her hands and knees, much like her sister. She tried to speak again but all that came out was canine yelps. It was the beginning of the end for her now, as Jack entered the cage from behind.
Ellie howled as Tim pumped hard into her. She couldn't do anything, though she instinct caused her to squeeze and clamp down on her assailant. Tim continued the assault, plunging in and out with a decent rhythm.
"I suppose you are wondering why Tim is doing my bidding?" Jack said to Rachel. The question was largely rhetorical as Rachel had no capacity to respond other than growl. "Well" he continued, undoing his trousers and revealing his full length to the helpless naked woman. "To start with, he's not being mind controlled, or tricked, or anything like that. Much like your sister, he is fully aware of what he is doing." Rachel turned back to the two fucking dogs, and Tim turned his head away in shame.
"I offered Tim a choice. He works for me as he is now, with no thought of subterfuge, and I return him and his sister back to normal in a year." Rachel turned her head to see Jack, just as he chose that moment to penetrate her pussy with some force. What had Jack done to Tim's sister? Was she a dog like Ellie.
"You see, Tim's sister suffers from a little curse I put on her. Once a week she goes into heat, much like the bitch your sister has now become." He laughed as he picked up the rhythm of his fucking of his helpless victim. Tim too kept going, the whines of both Rachel and Ellie starting to become louder and more pronounced. "To relieve herself she has to have sex with a dog. That's the only way. If she tries to resist she slowly degrades into full bitch as your sister did. Once she orgasms with a male dog inside her however she returns to normal." The sadistic tone in his voice was nothing short of pure evil. Rachel had never met Tim's sister, but was certain no one deserved such a depraved curse. "And it just so happens Tim here is a conveniently placed Male dog."
Rachel spun to see Tim still pounding a way, panting hard as Ellie began bucking her hips against his. "That's right! Tim has to fuck his own sister as a dog to stop her from turning into a bitch. If he obeys me for a year however she will be free of her curse, as will he." The news, and Jacks continued assault finally brought Rachel to the edge, and as she felt Jack give a final grunt and shoot his load into her, her own body was racked with the most amazing orgasm of her entire life. She collapsed forward onto the cold floor, shame washing over her as Jack stood up. Ellie also howled as her own, new body, was shivering with her own orgasm. Tim held her in place, and Ellie realised with horror that there was something expanding inside her cunt. Tim's knot formed, locking her to him, and as he tried to dismount, he turned, she felt the knot turn inside her. They were left ass to ass, with Tim's knot inside Ellie, her own body weak from the afterglow. Jack stepped out of Rachel's cage and walked over to pet his new dogs.
"Don't worry Ellie, I'm sure you'll make a great mother. We can make a lot of money from a decent puppy litter."