"Transform or dare me!" Cassie begged.
"What?" Rachel asked as she stepped into Cassie's room, and closed the door behind her.
"Just do it, my mom won't let me have panties back if she has her way," Cassie whined.
Rachel at that instant got an idea. "Okay, fine, transform or dare?"
Cassie quickly said "Transform!"
Rachel grinned. "Transformation huh? For your transformation, you will be regressed to a ten year old. You will never have been potty trained, and you never will be."
Cassie's eyes got wide at hearing this. Her body started getting smaller. As it got smaller, her boobs and hips shrank away. Her face and body got younger until she was ten years old.
Then, her diaper shrank down to her size. It now had baby prints on it. She didn't notice when she was wetting her diaper. However, she jumped when she felt a mess, which she couldn't control, start to spread over her butt. When she was done messing and it was spread all over her butt and back side of her diaper, she stopped squirming.
Then, Cassie...