Unbeknownst to Mary, the vial that transformed buster had also an effect on Buster fluids. And during their intimate encounter she had swallowed quite a load of his seemen. This unique mix caused her body to undergo a slow, subtle shift as she slept.
During the night, Mary's body temperature began to fluctuate, causing her to toss and turn restlessly. As her dreams became increasingly vivid, her mind struggled to make sense of the wild, instinctual images flooding her subconscious. The bonds of her humanity began to fray, replaced by an animalistic awareness that tingled through every fiber of her being.
Gradually, Mary's facial features softened, her jawline blurring as her chin shortened. Her nose elongated, becoming more pointed, and her irises widened, taking on a brighter hue. Pupils dilated, granting her heightened senses that seemed to amplify the sounds and scents of the night.
Beneath the covers, her fingers and toes began to fuse together, bones realigning as digits transformed into claws. Fine hairs spread over her arms and legs and started to grew coarser, maturing into a sleek, golden coat that shimmered in the moonlight filtering through the window. Her body contorted, compressing and reshaping as her spine curved, adapting to a quadrupedal gait.
When morning arrived, Mary awoke to find herself curled up on all fours, the blanket having fallen away, leaving her covered only by her new fur. Confusion warred with curiosity as she examined her paws and the unfamiliarity of her tail. When she attempt to speak only a muffled whine escape her mouth, her vocal cords altered by the transformation.
Remembering the events of the previous evening, she glanced over at Buster, who lay watching her with an empathetic gleam in his eyes. He had witnessed her metamorphosis, silently observing as the vial's effects took hold. Now, he rose from the bed, padding over to her side with a cautious grace.
Mary's ears perked up at the sound of his approach, her tail thumping against the floor in a mix of anxiety and relief. She whimpered softly, seeking comfort from her closest friend. To her surprise, Buster understood her whimpering sounds, his own canine heritage granting him an innate ability to communicate with her in this new state.
Lifting his hand, he placed it gently on her back, offering reassurance. As their eyes locked, she detected a depth of understanding in his gaze, a silent promise that he would guide her through this bewildering transition. In return, Mary nuzzled his hand with her snout, conveying her gratitude and trust.