Jess looked at her friend. She was an adorable little catgirl...though "little" was clearly not emphasized. She thought a little more shrinking would help, so she found the shrink vial and handed it to her.
"Try this one," Jess said.
"What is it?" Mary asked as she took it in her paws.
"You'll find out soon enough," Jess winked.
Mary felt a little nervous about her friend's secrecy, but all the same she started pouring it down her throat. To be on the safe side, however, she only took about a quarter of its contents.
Jess took the vial back as Mary awaited her change. The room started distorting, making Mary feel like it was growing larger. It didn't take her long to realize that she was actually getting smaller again. What did Jess give me? The mouse vial? Her panties slid off her waist and fell between her ankles. Her shirt was now small enough to cover her down to her knees, and the collar was so wide it drooped to one side, hanging loosely over her left shoulder. Looking at her surroundings, she saw that she was at breast-level with her bed. She guessed she was around three feet tall now. But looking over her body, she didn't see any other changes.
"Jess, was that just the shrink vial?" Mary turned to ask. But when she saw Jess, her friend was in the middle of her own transformation...