Not even slowing down to turn the door knob, Amy rammed her shoulder squarely into Amanda’s door, breaking the door with a thunderous crack and ripping the hinges from the frame. Amy plowed her mega muscles body through, sending the door quickly away from the frame and smashing against the far wall. Amanda fell onto her bed, dropping the gun to the ground. Amy stood there for a moment, looking at the gun on the ground and back over at Amanda. Amy tossed her right hip out and brought her right arm up, flexing her huge arm up into a 25 inch wall of feminine power. Her legs bristled and surged outward, sweeping across her tall frame and consolidating into detailed cuts of womanly muscle. Her abs looked like they were chiseled from marble. And her naked, perfectly shaped double D breasts pressed outward from her four inch thick pectoral slabs like twin pink balloons filled with living steel. The bullet nipples stood out a half inch as Amy had a hard time containing the excitement this new power provided. Smiling as Amanda blinked dizzily, Amy squeezed her fist harder, pressing her peak up a little higher and shooting muscle fibers across the massive bicep. Veins jumped upward across her thin, velvet skin. Amy stared intently at Amanda.

“So you did this to me, huh? Did you really want to give me all of these muscles?”

Amanda sat up, staring with disbelief at the Greek Goddess that was her sister. She didn’t look big or blocky or ugly at all. In fact, she looked even more beautiful, if that were possible. And at 6 feet tall, all of those muscles gave her an Amazonian stature with definite womanly curves. She was more muscular than any man she had ever seen, but better put together than any woman she had ever met. And Amy knew it. As Amanda’s eyes widened she simply stared, unable to formulate a response.

Amy sniffed and released her flex. “No matter. I’m happy with the results. But I am curious as to how it happened. It’s not like this is normal.”

Walking confidently toward the gun, Amy reached down and picked it up carefully as Amanda remained frozen on her bed.

“So it was this gun that gave me all of these muscles? Did you try it out on anyone else? Just how strong did it make me?”

Amanda shook her head and shrugged her shoulders. Amy snickered again. “So you tried out an unknown, potentially dangerous gun on your big sister? Not very sisterly.”

Amanda shook nervously. What could she say? She certainly didn’t shoot it at her with the best of intentions. And even though she was now build like a tank, Amy didn’t seem to be disappointed. In fact, she seemed to be thoroughly enjoying her new massive physique. Amy continued to stare at Amanda until Amanda turned away. Amy shook her head and then looked the gun over.

“So I see by the settings that you had it set in the middle of the dial. Was this where it was when you shot me?”

Amanda nodded her head. Amy stared at the gun, tossing possibilities around in her mind. Could she really become bigger? Perhaps grow more muscular than any MAN alive? And what about strength? How strong could she become? Where her muscles harder too? Could she become bulletproof? Amy’s breath quickened as her nipples hardened on her rock hard breasts.

“Well, perhaps we should see just how strong I am now, hmmmm?”

Reaching down, Amy gripped the bottom of Amanda’s bed frame and began to pull up. And to both girl’s surprise, Amy’s hand dug into the metal bar, deforming it slightly as the entire bed, and Amanda, began to rise. Amy giggled as Amanda grabbed the sheets. With one muscular arm, Amy slowly lifted the bed and Amanda up higher until the bed was five feet off the ground! Amy looked at her terrified sister.

“I guess this does make me pretty strong, huh? I’m lifting you and the bed with one arm. And it’s EASY! I’ll bet I could lift more than this. MUCH more! Apparently not only does the gun make your muscles bigger, but it increases their strength to fantastic proportions! I’m probably already stronger than any normal man alive!”

Chuckling at her whimpering sister, Amy brought the bed down slowly until it rested back on the ground. Amy began to think. She could call her boyfriend Jeff, the starting fullback for the state college they attended. Showing off her superior muscles and strength to him nearly made her giddy. Or perhaps she should try out her strength first to see just how strong she was. Either way, the day had taken one hell of a turn.