"Buster come here boy!" shouted
Buster hounded into the room and saw his female owner in canine form nude and ready to mount. Cal watch as their family dog used his weight to mount his sister and started to fuck Katy. She whined and Cal had immediate attacks of guilt that he tried to rip Buster off.
His pet dog bit him on the hand, grabbing a wooden school ruler he stabbed and whacked the dog until he decided to go Katy's collar he put it between the fur of Katy's neck and managed with a metallic click to snap the lock.
Instantly the fur began to retract, and a much fuller pair of breasts began to extend from the bitch. The dog’s face, head and ears were shifting in shape, as long hair spouted from its scalp and the fur of its coat receded, revealing soft, feminine, pink flesh. It’s ass filled out, as two sets of tits disappeared and the topmost pair rounded out and grew. It was clear that the Shepherd was becoming a human female.
Soon, the yelping of the bitch modulated and morphed into sobs, echoing from the mouth of the newly restored Katy, who was shrugging off the last vestiges of her canine appearance.