Katy begins to feel something as Buster continues to fuck her. She looks at her hands and sees that they have almost completely turned into paws.
As he pumps in to her, she can feel a tail pushing out. Katy sees her beautiful coat of fur returning. She could see her nose pushing out into a canine muzzle. This turned her on even more as she slid off the bed and completely onto the floor.
Don't I need the collar to change she thought as Buster fucked on, but this thought was lost as Buster erupted into her sealing her in her new dog form.
She knew that she was his completely now. She knew that she was pregnant with his puppies.
After Buster had slipped free and left, Katy the dog sat with her leg lifted in the air licking her sex clean.
Suddenly, she stopped when she heard footsteps on the stairs.