“Yeah, that’s right. How does that muscle feel to you, boys? Or is that firm, bulgy thing you're looking for kind of missing in action? Aww, let’s see if I can help make those kinds of muscles easier to find.” Sybil closed her fists, turned her wrists and flexed her biceps. As she did, female muscles everywhere, whether aged 9 seconds or 99 years, began developing, steadily becoming larger, harder, denser, quicker, stronger, tougher, more defined, more responsive, more enduring, broadening their shoulders, lifting their breasts, tightening their stomachs, filling out their legs and their backsides, bulging up their biceps, adding spring to their legs, armor-plating to their abs and relentless power to the beat of the hearts. They lost none of their feminine fat, and with new muscle and strength, their figures became even more dramatic.
After just a minute, the school grounds were filled with new shouts of feminine excitement. At first it was the more athletic girls flexing their arms and seeing larger, more defined muscles than they'd ever imagined they could have, but soon nearly all the girls were joining in, lifting their tops to show off their tight waists, shifting their shoulders from side to side, effortlessly rolling off cartwheels and handstands and throwing each other, or, even better, the nearest boy, into the air. Miranda’s top tightened, as her expanding shoulders and chest slowly added stress to the buttons fighting to keep it closed and her thickening upper arms stretching her short sleeves. She was glad she had worn a skirt today instead of tight jeans, many of the girls around her were bursting out of theirs. She struggled to stay subdued, with her increasingly unhappy boyfriend right there, but she was as thrilled inside as the girls around her.
“Awwww, Jason, don’t worry! It’ll be all right!” she said, putting a hand around his arm to comfort him. She was amazed at how easily her hand closed around it, and how soft it felt, while he looked alarmed as her bicep jumped from the movement of her hand.
“You-you’re so big,” he stammered, his eye fixed on the still growing bulge of her upper arm.
“Oh no I'm not,” she insisted soothingly. “Not really. I’m not that much bigger than before. I’m sure it just looks that way to you because you’re smaller. Just don’t worry that --
Her words were interrupted by a button flying off her top, opening a wide gap between her breasts.
“Oh!” she said, startled. She tried to pull it closed but succeeded only in ripping the overstressed fabric. “Stupid top!” she said, blushing.
Jason’s eyes darted temporarily to her exposed breast, which was flowing out of her overmatched bra, but then returned to her upper arm. Miranda had never been at all muscular, but now her unflexed bicep was easily half again as large as his flexed bicep used to be. What was happening?! She’s a girl! She can’t be that strong!
Inside the curtain the boys were shrinking away from Sybil, as far away as they could get, back against the shimmering curtain, afraid of her increasingly powerful physique, especially compared with their own. But the view outside gave them no comfort either. Their world was being turned upside down.
“Halfway there, boys. What? Just halfway? What more can she do to us? Oh, I think you can guess the next step, right? Isn't it obvious?” She held out her hands and lifted her palms up. This time the change was instantaneous. One second she was 5’6”, the next she was 6’ tall, and every part of her grew in proportion. She looked down over the boys, all except Chunky, who was still over 7’ tall. “First I made you smaller and weaker than you were, and now I’ve made you smaller and weaker than us.” She flexed, and a hard, softball-sized muscle rose out of her arm. “Yeah, smaller and so much weaker. Look at this muscle, boys. I’m an athlete, but not a strength athlete. I never had large muscles. This is just a runner’s muscle, a sleek, trim, female, distance runner’s muscle. This is the kind of muscle every girl can have, the kind she naturally will have, unless, of course, she’s bigger than average, or works out.”
“That’s not natural! Girls don't get muscles when they work out. Not like we do,” one of the boys challenged. “They just, you know, get toned. It’s their hormones. Everybody knows that.”
Sybil smiled. “Oh, you just wait and see what comes naturally now. Just wait and see how EASILY we girls will add even more muscle, hard muscles, full of power and endurance.”
Almost immediately after Jason had those thoughts, Miranda was no longer looking down at him from the two inches of her heels. Instead, she was suddenly well over a head taller than he, with even broader shoulders, a larger chest and breasts that were at least one cup size bigger, longer legs, and even thicker arms. This time her clothes grew along with her and fit comfortably around her muscular physique.
“Oh! My!” she said, at a loss for words. Jason looked so small to her, like a child. His eyes were wide as saucers. “Jason? Jason? Are you all right?” He looked as though he was about to run away.
“Miranda, what’s ... what's going on?” he said, sounding timid and afraid. Instinctively she reached down to comfort him and without thinking she lifted him and held him against her breast, as though he were a little boy. He gasped slightly as her breast spread out on his chest and he hesitantly touched the other one. His hand looked so small on it, so fragile. “Go on, Jason. You can hold it. If it makes you feel better. Go on.” She was sure if they weren't on the school grounds he would be sucking on it right now. She imagined his small lips sucking desperately at her large breast and felt a deep tingling between her legs. She pulled him closer. Poor Jason. It was all too much for him. She didn't even notice his weight, only that he was trembling. She stroked his back and he turned his head and watched her bicep expand slightly as she moved her hand, which only made him tremble more.
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