"Please Katy," Sarah begged as she watched her sister take a peek out of her room to check out if no one noticed the girls' very strange discussion, "I really do understand this collar's powers and I want to try it on."
Katy, still naked after her recent transformation and the unexpected intervention of her little sister, closed her room's door quietly and sat down on her bed. She held the black leather collar in her hands and looked at it for al long time.
Something had happened to her. It wasn't just the surges of animal lust that seemed to wash over her body, (it was hard for her not to put the collar on right now again, but she resistet it - for now) it wasn't just the change of her sexual desires (just the slightest thought of a male dog gave her arousing shivers now) ... somehow the collar and the dildo had changed her mind to something far off her old human self.
She felt the collars' call for her to wear it and turn into a bitch again right away, but she felt a second call to share their gift with as many devoted women as possible.
She wanted her sister to be a dog bitch. She wanted to see her sister grow fur. She wanted her sister to feel the sweat arousal only a dog bitch in heat could feel.
"Please, sis'," Sarah begged again. She had disrobed while Katy was staring at the collar in her hands and knelt before her now. Somehow the collars' magic seemed to call out for Sarah and the girls resistance (if there was any) waned with every second. Her young and quite well developed body shivered in wild expectation for the things to come.
Katy looked up, her once human smile vanished and replaced with a feral grin.
"Fine, little sister," she said calmly, "be my bitch."
Without further notice Katy put the collar around Sarah's neck.
Sarah's eyes went wide.
Wild visions of mating dogs flooded her mind and erradicated part of her human soul within an heartbeat.
Then, everything changed...