"Hey, I know," Jess replied. "We can push her around."

Robert looked at his "big" sister, now curled into a ball, protectively. She was so helpless now. There was nothing Amanda could do to stop Jess and him from doing whatever they wanted. He loved the feeling of absolute power, absolute authority he had now over her.

"But first," Jess said, "I want to be bigger. Not as big as you, of course. You're the boy, and you SHOULD be bigger. But I want to be as big and strong as I can be, just a tiny bit smaller than you."

Robert frowned. "I don't know Jess. We can't control the gun that well. If I fire it again, who knows how much of an effect it will have. We're perfect now. We should leave well enough alone. Anyway, we're plenty big enough to take care of Amanda -- and anyone else who challenges us."

Jess shrugged, the motion making her enormous breasts bob slightly. "Well, OK. If you think it's best...." She stood there, waiting for Robert to take the lead.

Robert smiled. He bent down and lifted Amanda to her feet, then effortlessly raised her off the ground. It took just one arm to lift her, but holding the gun meant he couldn't use his other hand to play with her.

"What are you going to do to me?" Amanda said fearfully, unable even to pry her brother's fingers apart using both hands.

Noticing Robert's indecision, Jess held out her hand. "Here, sweetie, let me hold the gun. I'm sure Amanda needs a good tickling! That would surely start to teach her to barge in on us!" She winked at Robert and moved her shoulders back and forth, letting her breasts swing. "Know what I mean?"

Robert grinned. "Yeah." He handed the gun to Jess.