Enjoying the muscle show, Amanda decided to even things up and see how Melissa would look with a shot, seeing as that was her original intention. Staring at the dial, she turned it up to 30% and paused. She thought that a 30% shot would likely even things out. Amanda turned the dial to 50% and nodded her head. That ought to give Melissa an advantage.

Looking back out the window Amanda could see the sweat soaked Melissa being pulled to her feet by Alan. Amanda took aim and fired, hitting Melissa square in the back.

Melissa immediately stood straight up as the wave of power surged through her muscles. She sucked in a breath as her entire body began to tingle. Alan looked at her with concern that soon changed to surprise as Melissa’s body began to swell.

“Wow, Melissa, it looks like what ever happened to me is happening to you too!”

Melissa looked at Alan with wide eyes and giggled as her frame began to pile on pounds and pounds of earth shaking female muscles. Her tone legs blew out with incredible slabs of muscle, quickly matching the size of Alan’s monster quads. Melissa’s upper body expanded in every direction, ripping her shirt up the sides and popping the buttons off the front. The white material became translucent and the athletic bra stretched harshly into her expanding back and chest. Melissa winced as the material dug into her upper body, but then let out a low growl as she flexed her massive pecs and lats, splitting the shirt up further up the sides and snapping the bra beneath the overstrained material. Bringing her arm up, Melissa flexed her biceps, destroying the sleeves up to her massive shoulders, showcasing a set of 27 inch biceps to match those of Alan!

Alan’s flaccid member quickly became hard again at the sight of the muscle goddess transforming in front of him. He smiled lustfully.

“Holy crap, Melissa, you’re as muscular as I am! This is fantastic!”

Melissa brought her arms down to her sides, but continued to clench her fists. She returned his excited stare with one of dominance.

“Oh really?”

Melissa could feel her muscles continue to harden and strengthen. She could also feel them pulse as they continued to grow. Muscles bigger than any woman had ever flexed before began to surge bigger, soon overcoming the size of Alan’s incredible physique. Loud tears indicated that her growth wasn’t done as her upper body continued to blast forth bigger, more defined and overwhelmingly sexy mounds of female muscle. With one final pop, the last thread of her top was destroyed, leaving Melissa with her shirt in rags, clinging to her gigantic, sweat soaked muscles. Her legs continued to expand with reckless abandon. Her thighs touched in the middle and then spread out, growing thicker and more defined, blasting outward to nearly ridiculous size. Her calves pushed her socks down to her ankles, jutting out beyond 30 inches around! Her skirt shifted as her thighs and muscle laden glutes pressed the material out. Melissa giggled.

“Hmmm. It appears that my muscles aren’t quite done growing yet.”

As Alan began to sweat he continued to scan upward, shocked at what he was seeing. Her monster quads swept incredibly up to an awe inspiring set of abs and obliques that bristled with strength. Her abs remained narrow but were covered with blocks of steel hard muscles. The bullet proof mid-section swept seemingly impossibly into her barn door wide lats and a thick, striated chest that throbbed with muscles not just bigger than Alan’s, but bigger than any male heavy weight bodybuilder had ever dreamed to flex. And her monster chest was still grinding forward with unparallelled strength and size. Her small breasts has swelled too, matching the growth in her pecs to press her chest out over a foot in front of her! She then brought her arms back up and flexed down as her entire body roared with strength, size and power.

“In fact, I’d say your muscles are starting to look a bit puny.”

Tensing her fists hard, her biceps exploded upward, pushing up and over her shoulders and hard against her forearm, rising and peaking at 36 eye popping inches around! Melissa smirked as Alan’s jaw dropped open.

“Compared to mine!”

Releasing her flex and eyeing Alan’s steel hard member, Melissa reached up to her collar and tore off the remaining rags of her tennis shirt and athletic bra, tossing them to the ground and exposing every inch of the biggest, most muscular upper body ever flexed by man or woman! Ripping off her skirt next, Melissa was on Alan, kissing him deeply and pulling him closer to her rock hard body. Alan grimaced against her unbreakable grip and steel hard muscles. He was shocked that he couldn’t move her body an inch, much less break the grip, not that he wanted to.

Pushing Alan back against a post of the chain link fence at the back of tennis court, Melissa guided Alan’s shaft in and began grinding forward. Alan worked to match her rhythm, as her strength was now far greater than his. His large back pressed hard into the post, which began bending against the weight of the mega muscled duo. As Melissa began to ride Alan, he could feel the muscles in her vagina grip his steel hard shaft and squeeze it tight as she pulled him in. He groaned with pain and pleasure. Just moments ago he held her entire weight on his incredible penis. Now Melissa was compressing it with her inner muscles as though it were made of clay. The steel post continued to buckle and groan, while snaps and crackles of the concrete holding the posts increased in intensity. Melissa had grabbed hold of the fence, easily bending the steel wire with her hands. Smiling, Melissa pressed forward, bending the post in half and pulling a large chunk of concrete out of the ground as the post crashed fell toward the ground. Melissa smiled, releasing the fence, sending it crashing the ground. Then using the incredible strength of just her inner muscles, Melissa pulled all 300 pounds of Alan toward her, pulling his cock deeper. She then arched her back and pulled him off his feet! Alan leaned forward, placing his hands on her bowling ball sized deltoids as Melissa began to pull him in and out using only her super strong vagina muscles. After minutes of back and forth action and growing pain for Alan, Melissa came, finally allowing Alan the chance to release as she came over and over, pulling him hard against her steel hard muscles.

As Melissa finally released him, Alan stepped back, letting out a deep sigh and falling onto his behind, gasping for breath. Melissa smiled mischievously.

“That was incredible! And I feel so strong! Like I could toss cars around with ease! And with muscles like these, there isn’t a sport I couldn’t dominate or a record I could crush!”

Alan smiled weakly, looking up at the incredibly beautiful, completely naked muscle goddess standing in front of him, wondering just where this was headed. He wouldn’t have long to find out as sirens were soon heard and within moments…