Jim had an idea. Why not shrink Dani? Only... not all of her.
He realized that he had never tried a transformation by selecting a target and then making exceptions to the target. He could shrink her all over except for a few... special areas.
He smiled. "That might just work," he decided. "And, anyway, if it goes wrong, at least she'll just completely shrink."
He headed downstairs, and tried to steady his nerves for what he was about to do. After this, there would be no going back on the secret.
*****
The two sat watching TV where Jim had left them. Dani felt bored. She looked at Judy and found the girl mesmerized by her show. Maybe it was time to go have some fun with Jimmy. She imagined surprising him in his room, mid-wanking, and laughing her ass off at his tiny member. That ought to teach him his place with her again. No more smirking.
Just as she was about to stand, Jimmy returned looking happier than before.
"Well," Dani greeted him. "That was quick. You might want to work on your stamina or you're going to disappoint some lady later."
"Thank you," said Jim as he entered the room.
"For what?" she asked uncertainly. The kid seemed immune to insults all of the sudden.
"For making this easier." He stood next to the TV now.
"Making what easier?"
"You'll see," he said and smiled. He was really starting to creep her out. His face went serious as he gave her body a quick look. "How tall are you now Dani?" he asked.
Naturally, she stood up to show off her height advantage and gloat. "I'm 5'9", and I'm guessing you're still somewhere below 5 feet."
Jim smiled. "True, but I think you're about to join me."
Dani let out a short scoffing laugh, "Hmpf. What are you talking about, weirdo?" Meanwhile, Jim held up something small and red in his right hand. He put it to his lips, took a breath, and blew. FFFFFFFFFFOOOOOOFFF. It grew larger, a balloon, she realized.
"Ooh, that's cute," Judy said. She had finally torn her eyes away from the TV at the sound of the balloon.
"Yes, very cute," Dani said. "You save that from your 10th birthday party last week?"
He kept blowing again and again until it was fully inflated. He held it sealed shut between thumb and finger.
Then, he started to whisper.
"What are you mumbling now?" she asked him, but he kept on whispering. Now, she was just feeling impatient. What the hell is he up to, and when is it going to be over? she thought.
Although he spoke too quietly for her to understand him, she caught a few words of what he said, such as "size..." and "except for her..."
He stopped and took a deep breath. "Here goes nothing," he said and then let the balloon start to deflate in his hand.