Amanda smiled, still holding the gun. This had to be the greatest thing ever.

“Well, we can try it on Bethany next.”

Bethany’s eyes lit up. “Cool! But could you set the muscle up a bit. Sarah had bigger arms than me and I want to be as big as her.”

Amanda nodded her head, happy to see what differences a slight turn of the dial would do. After making the adjustment, Amanda pointed the gun at Bethany and fired. As the yellow charge of energy shot into Bethany, she sent her arm out and looked panicked.

“Wait!”

Amanda and Sarah looked worried. They both yelled out “What?”

Bethany brought her arm down and sighed. “Oh never mind. I just wanted to take my shirt off before….”

Bethany didn’t finish her sentence as the growth took over. She began to moan with pleasure as her muscles began to grow. Her thin legs grew in controlled pulses as they flexed seemingly on their own surging bigger and stronger and more defined with each contraction, quickly surpassing female bodybuilder size, but with pleasing curves. Her shorts popped threads as her thighs ballooned and her glutes swelled, pulling the shorts half way up her behind. Her blouse rose up quickly as her lats, shoulders, traps and chest all piled on slabs of unreal muscles. As her top began to rip and tear, her abs, once flat but nondescript, swelled as blocks of muscle popped into view all across her midsection. Tensing her upper body, a loud rip destroyed her top and snapped her bra, exposing an incredible array of striated muscles across her torso and two large breasts that seemed to defy gravity. Giggling, Bethany brought her arms out and slowly pulled her widening forearms up, ripping through the sleeves of her blouse in an instant and powering up two melon sized biceps that swelled and consolidated even bigger as her forearms reached vertical. Adding three inches in height, Bethany stood at 5 foot 10 and easily overshadowed Sarah in ever department.

“Oh. My. God! Just look at me!”

Pulling off the ruined material clinging to her upper body, Bethany brought her right arm back up and flexed her bicep hard. A 25 inch muscle blasted into prominence and bristled with strength and vitality.

Sarah looked a bit disappointed. “Hey! You’re bigger than me!”

Amanda whistled. “Hell, your bigger than any man in town!”

Bethany brought her arm down and tensed her pectorals, pushing her prodigious chest out 18 intimidating inches. “And I’ll bet I’m twice as strong too!”

Sarah reached over and felt Bethany’s muscles. “She’s not kidding. These muscles are hard! Harder than mine anyway.”

Amanda looked at her two mega muscled friends and smiled. Looking down at the gun, she twisted the dials again.

“So what do think we should do next?”