"How about neither?" said Joe.
Melanie angrily reached for him, but suddenly her giant body began to shrink. The change was so rapid that she felt as if she were falling into herself. When the change stopped, she found herself on her hands and knees, disorientated. She noticed that her tits and ass were back to their normal proportion. She looked up and gasped. Now, Joe appeared to be the giant one. When she staggered to her feet, she realized that she was now eye-level to his thigh.
"You see, Mel," he said staring down at his tiny sister. "I'm the one in control now. I don't have to listen to a thing you say ever again." He smirked. "Look at you. You're two feet tall. You won't be kicking my ass anywhere now. Hell, think about it. Little Suzy next door could kick your ass now, and she's not even potty trained yet."
Melanie looked down at herself. It was true what he said. She felt tiny and helpless. She might as well have been the same age as Suzy for all that she could do now at her size. Tears filled her eyes. She covered her face with her hands to muffle her sobs.
Seeing her cry, Joe felt a tinge of guilt. Although she had been bossy to him in the past, she was still his sister. It felt wrong to make her cry.
He thought that maybe he should show her some mercy.