"Robbie, I don't know what to do with you." She almost casually shot him with the gun. He gave a cry and tried to dodge, but ended up tripping over his own two feet as suddenly he shrank down, his frame drawing in on itself and his clothes becoming comically undersized, reducing him to a skinny-looking child. As Robert began to get to his feet, Amanda spoke up.

"Don't run, or I'll REALLY shrink you. In case you were wondering, your now 4'11" and should weigh around 90 pounds." Said Amanda casually.

Robert looked angrily at his sister, and then realized he'd never make it to her by the time she did something horrible with that gun. Jessica actually looked sad. "I'm sorry Robbie," she said.

"So am I, Robert. You seem to love hurting people with those muscles of yours, so I made you smaller then the smallest person in your class. This really is for your own good." Amanda looked over at Jess, who was lost somewhere between anger, sadness and confusion.

Robert was about to say something and stopped. Now was not the time - he'd get her back later when he had a chance to jump her...

"You're so transparent, Robert." and she shot herself in the chest. She'd chosen her clothes carefully that day - elastic nylon shorts, a few sizes larger then she needed, and her calves and thighs began to expand. She turned her hips as her glutes exploded into spheres of muscle behind her. Her tummy, which had always had a little bit of fat she'd never been able to get rid of, suddenly transformed, muscles popping out and up her chest into a full 6 pack. For reasons she wasn't aware of, her hips seemed to expand a bit as well, and her frame bulged against the now tight nylon shorts which pulled higher as her height increased by nearly a foot.

Her chest seemed to be next, and she held her breath as pectorals and lats blossomed - she hadn't been wearing a bra, and she felt a flush as her chest pushed out against the top, filling it out nicely and giving her cleavage she'd long dreamed of having. She felt the top strain as her chest expanded a little more then she'd barginned for - even accounting for the muscles she had, her bust felt like it had gotten bigger - she could even see her engorged nipple poking hard into the nylon, barely noticing the changes to her arms as she gave a brief gasp at sensations in her chest. The haltertop she was wearing was now practically a bikini.

Only once she had recovered did she raise an arm and flex, the defined and chiseled muscle of a fitness model bulging impressively into biceps the size of a baseball. Jess and Robert could only look with amazement and envy, though the changes weren't nearly as pronounced as they had been the last time the gun had been used.

Amanda felt up her rock hard thigh for a moment, and then squeezed her bicep as large as she could manage. "Nice. Much bigger then you can manage, Robbie. Just so you know, Jess here bet her own body against yours that you would stay. Because of you, not only are you stuck relying on me again, but Jess here is stuck flat and skinny."

Amanda took a look over at Jess again and stroked her jaw. "Thankfully, I'm not an asshole like you, Robert."