A sly smile crossed Jess' lips as she lifted the Mouse vial from its holder. "How about part-human, part-cat, part-mouse?"
"Oh," Mary giggled. "Now we're talking fun." She happily accepted the vial and drank a little less than half. She was growing fond of her feline features and didn't want to lose too many of them.
The change began with her teeth. She felt her two front fangs expand and grow over twice their size. They became so long she couldn't keep them contained inside her mouth, and they protruded comically from her lips. They weren't quite mouse's teeth, however, as they were still sharp despite their thickness. Her muzzle expanded out just a bit more than the small one she already had. More whiskers grew on her face. these were more irregular and crooked, and they were almost two times longer than her petite feline ones, growing well beyond the width of her head. A few short ones also grew above her eyes.
Her cat ears began to lose their triangular shape as they rounded a bit. They retained a bit of a point to them, but they were much larger now.
Sections of her fur lost their color. Her shoulders, elbows and knees turned a light gray. Her tail turned gray as well, but it didn't start losing its fur. It grew a couple more feet and thinned down. It lost a lot of its bounce and for the most part laid still and flat on the floor, curling around Mary's body.
Her lower legs began thinning. Her feet lengthened into a mouse's hind paws. The fur on her legs grayed out and the musculature changed to resemble that of a mouse's. She grew slightly wider upper legs, but her lower legs and feet were quite slim.
She began to shrink again, and even faster this time. Mary watched with a sense of vertigo as the room expanded. Her shirt became humongous on her small body, her arms were swallowed up by the short sleeves. Soon enough she was small enough to slip through the collar completely, and the fabric dropped to the floor, surrounding the little cat-mouse-girl.
Now that all of her clothing was gone, Mary began to feel a bit exposed. She still had a mostly orange fur coat, cat-like claws and six breasts, but at this size she felt very vulnerable and weak. Looking around for a size comparison, she found she was at chin- level with her bed.
Jess knelt down to her, plunking a yard stick on the floor, straight up. "Found this by your desk," she said. "Well, two feet tall. Not so bad. How's the world from down there?"
"Big," Mary's voice was much softer and higher-pitched now. "Come down here and join me."