Casey had figured out that Dennis liked the muscular girls last year. It took a bit of detective work, but he always seem to hang out too much around the athletic girl's sorority, even though they rarely talked to him. And when she was working on rebuilding an engine last year, she spied him staring at her biceps as she strained to tighten some nuts. She had built up a crush on Dennis during this time and had figured out the way to win him over. And it was by doing something she liked to do.
So this summer, Casey took to the weights in earnest. She also let her hair grow out, since she had picked up that nugget of Dennis's likes during an RPG all-nighter. Now her long black hair was kept well washed and conditioned and blow dried, flowing around her pretty features. Casey wasn't much into make-up, but for Dennis she applied a bit of base and some lipstick. She had even put together the outfit she figured he'd like. A tight muscle shirt, a nice push up bra and athletic shorts. Only her hiking boots remained from her normal butch outfit from last year. The outfit change wasn't a bad thing anyway since she was tired of getting hit on by the lesbian crowd.
And now the months of lifting were going to pay off. Her biceps were the main focus since that seemed to be where Dennis's eyes always moved to when looking at buff chicks. Casey was pretty proud of her arms. Weeks and weeks of curls had sculpted a pair of baseball sized biceps that would be the envy of any athletic woman.
And then he shows up with this pretty young thing. Casey had given her a hard look over. She must have been a cheerleader. Probably still wanted to be one. Casey had pulled her shoulders back and thrust out her chest as Dennis approached. Standing 5 foot 10, she was pretty tall. Taller than that blonde bimbo anyway. Cutting to the chase, she wanted to show off her biceps and Dennis and this other girl where quick to comply. The fact that Dennis was eager was no surprise. The fact that Gina did was actually a blessing in disguise as she would get to outshine her with her pumped up arms.
As Dennis stared at the girls he was in shock. He had always liked Casey as a friend and had not really thought about her much differently unless she was flexing up her biceps around him. But now! Holy cow, did she look hot. The long full dark hair and smiling face were great. The outfit showed off a girl who had spent some serious time in the gym. And her biceps! Oh wow, they were pretty good last year, but now they popped like a pumped up fitness star.
As he pulled the camera up, a new fantasy focused in front of him. Casey must have been working out. And it looked like her bicep was growing bigger when she flexed. What if' What if she could grow bigger muscles just by flexing them. Holy cow! Bigger and stronger muscles with every tense. And harder too. Now that would be awesome.
With this thought firmly implanted in his subconscious, he looked into the camera, watching this totally smoking Casey bob her bicep up and down. Gina may have been better looking and had a curvier build, but right now his thoughts were focused on Casey. And when he snapped the picture, Casey sucked in a hard breath.
Casey froze for a moment as a wave of energy welled within her. She had never felt anything like it. It was if she had just completed a work out and felt totally pumped. Gina released her flex and giggled, not really paying attention to the sparks seeming to fly between Dennis and Casey. Deirdre noticed this however and looking out for her sorority sister, quickly pulled Gina aside, offering her more details of college life from a woman's perspective.
This left Casey to let out a breath as the high energy feeling subsided. Releasing her flex she smiled coyly at Dennis.
'Liked that did you?'
Dennis blushed, still trying to hide what Casey already knew. 'Uh, yeah I guess. I mean, you look great Casey. Have you, uh, been working out.'
Casey smirked at Dennis and grabbed his wrist. 'Come on you, let's get a little privacy.'
Dennis glanced over at Gina, who caught his eye, nodded and waved as Deirdre continued to keep Gina occupied. With another yank from Casey, Dennis stumbled forward and soon found himself in Casey's Spartan room. A bed and desk were on one side and a small bench and weight set were on the other. Nodding her head toward the weights, she smiled at Dennis.
'Does that answer your question?'
All of this was turning Dennis on more than he would have thought possible. He began to sweat a bit. 'Uh, is it hot in here?'
Casey licked her lips, slid in front of Dennis and pulled her right arm back up. 'You bet it is.'
Dennis gulped as Casey slowly tensed her fist and to her surprise felt another pleasurable rush as her bicep built back up in front of the nearly drooling Dennis. Only it built back up' Bigger? Dennis had no perspective, but Casey did. She felt strong. Stronger than she had ever felt before. Maybe it was the fact that she was finally able to get Dennis where she wanted him. But it seemed to be more than just that. Smiling with ever growing confidence, Casey purred.
'Now is this the arm you've been wanting to see up close? A hard, strong female bicep, flexing and surging and popping into a thick ball of muscle?'
As Dennis's eyes continued to grow, so did Casey's bicep. This time she was sure of it. Having spent many the evening pumping her biceps as hard as she could thinking of Dennis, she knew what her 12 inch biceps looked like. But now, each time she flexed her bicep a shot of energy was pulled into her muscle, making her bicep bigger, and giving her a feeling of increasing strength. By the fourth pump Casey's bicep had grown a full inch!
And this growth was not lost on Dennis now. He blinked a few times even as his hands slowly raised upward, seemingly of their own accord. He just had to feel Casey's mighty muscle. A muscle that was big and' Growing bigger? Momentarily snapped back to reality, Dennis's thoughts shifted to the camera. He had been thinking about Casey having the ability to grow bigger and stronger muscles just by flexing them. Had he done this? Would her biceps, and the rest of her muscles too, continue to grow bigger, stronger and harder the more she flexed them?
By this point, both of them were sweating. As Casey pulled her forearm up for the fifth time, she held her flex, tensing extra hard. And like some science fiction movie, her bicep expanded in every direction, growing, surging and blossoming right before their eyes. As Dennis's mouth slowly unhinged, Casey let out an orgasmic breath.
'Oh my god, Dennis! Can you believe this? My bicep. It's growing bigger and bigger with every flex!'
Dennis tried to clear his drying throat. 'Uh, that can't be possible can it?'
Casey let out another breath as she released her flex. 'Well then, big boy, go grab that measuring tape in the top drawer and you can help find out for yourself. That is if you'd finally like to get a chance to feel what this mighty fem-muscle feels like.'
With his heart pounding like a bass drum, Dennis did everything he could to tear his eyes away from the magnificent bicep and turn toward the desk. Opening the drawer he pulled out the measurer and like a overexcited puppy, quickly pulled the tape around Casey's bicep, feeling the incredible muscle for the first time. Casey moaned.
'That's it Dennis. I know you can't wait to feel how hard, how big and how strong my bicep is. But now' Now it's growing even bigger. Every tense, every flex makes my bicep bigger. And stronger. I can feel it. Now, tell me what the reading is.'
Dennis leaned closer, wanting to reach his tongue out and lick her bicep. He swallowed hard again and looked into Casey's sparkling green eyes.
'Thir-Thirteen and half inches.'
Casey moaned seductively. 'This morning they were 12 inches. After I had pumped them up. My mighty fem-arm has grown 1 and half inches just by flexing a few times.'
As Dennis held the tape, pulling his gaze back at her arm, Casey pulled in a breath, feeling her bra tighten as her pectorals surged forward. 'And if you like this bicep, just wait. 'Cause I'm in a flexing mood.'
Dennis stared at her bicep like a teenager watching his first porn movie. His member rose and his stare was fixed. Casey pumped her arm, squeezing her fist extra hard at each apex and nearly came as her bicep added a full half an inch with each flex. Dennis watched as the tape moved from 14 inches, to 14 and half, to 15 inches and with one hard, long flex, up to 16 glorious inches!
At this point, Dennis moved his hands up to her biceps, feeling the hardness, squeezing her muscle. And looking into her smiling eyes, squeezed even harder. Only he could barely push his fingers into her incredible muscle. He traced his fingers across her deepening bicep split and palmed her surging peak, marveling at the fact that he couldn't cover her bicep with his entire hand.
Casey let out a low, animalistic growl. The growth and surge in strength was turning her on too. She could feel the rest of muscles growing too as every shift, every flex, caused her muscles to expand.
Casey leaned forward, whispering in Dennis's ear.
"Are you ready for some real flexing, or would you like to see how strong I've become? She paused as she glanced down at the tent in Dennis' pants. Or we could, you know, get physical.' Dennis gulped at the choices and with shallowed breaths, thought about taking another picture to drive Casey to even greater powers, or at least head to gym so she could show off for him. So as they looked into each other's eyes....
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