Now a Mountain Dog Sarah hounded back to her adoptive siblings. Cal had a pair of boxers on while Katy had on a robe covering her breasts but exposing her bush. "Oh hello Sarah." The huge Mountain Dog lunged at Katy pinning her to the ground as she bit her sister on the forearm. Cal had to use a golf stick to whack the dog off his sister. Sarah then bit Cal on the ankle making him hop around in pain.
"Aw! Fucking Bitch!" Katy pulled back the tattered sleeve of her robe showing a mess of blood and fur? Hair started to rise from the wound as Sarah's curse enriched saliva started to react to Katy's body. More slowly she could feel it in her veins as her immune system tried to fight it. She started to sneeze as her human body tried to reject the changes being wrought on her.
Throwing her robe to the ground Katy was surprised to feel the changes begin almost immediately. As she watched, the fur on her arms began to grow and thicken, spreading to other parts of her body. Her small breasts flattened against her expanding chest. Her hands lengthened, as thick pads began to form on the palms of her hands and the tips of her fingers. Her feet lengthened even more, and her big toe receded into a dew claw. The change in her feet caused her to fall into a hunched position.
Rapidly her brother was joining her. Cal ripped off his itchy boxers to find that his penis was covered in furry sheath and the lipstick was out. "Nooonooo." he whined. He was slowly turning back into a male Shepard as well. He looked at his dick, his hard on was like steel. He couldn't imagine fucking Sarah as a dog but Katy was somewhere between human and dog.
And she looked like Amy Adams with her blue eyes, auburn hair, cute freckled nose. He swooped picking his sister up and dumping her on the bed.