"Hey, cutie!" Emily entered, planting a kiss on Mary as she did. After a few moments of making out, she asked, "So, what did you want to show me?"
"Take a look at these," Mary said, indicating the box of vials.
Emily picked one out of the box and looked at it. It was a pretty plain looking bottle with a clear liquid inside. On the label was a picture of a sheep. "Did you buy some kind of weird imported liquors?"
"Just watch," Mary said, taking the cat vial she'd set aside beforehand and taking a sip. She could feel her ears sliding up to the top of her head as they changed shape. A sudden pressure above her butt drew her attention. She slipped down the back of her skirt and panties as a furry feline tail started to grow. With a note of pleasure, Emily ran her fingers along Mary's waist. Right above her skirt, hairs had started to spread upwards towards her navel. Mary lowered her skirt and panties to get a better look. Her pubic hair was expanding into a thick coat of fur, covering her lower torso.
As Emily marveled at her changes, Mary explained to her friend how the vials worked. Emily idly rubbed herself. She could feel herself getting damp just thinking about the possibilities.