They had reformed their technique and made sure that when Riley came around to Emily's house she would be plied with the milk from Erika's swollen breasts. Riley claimed that she was lactose intolerant and she would be sick afterwards. Erika had raised this as an issue. So Emily used a piece of cloth soaked in alcohol. This overwhelmed Riley and she was passed out. They carried her to a spare bedroom and tied her down with duct tape.
"Is that really necessary?" Emily panted.
"I said before you need to a girlfriend over than me."
She was hooked up to an IV of her breast milk. Once they had her on the IV for several hours they let her go. She pulled herself and her feet.
In the light Erika could see Riley was now shaking and pouring with sweat. Her white top and yellow pants were clinging wetly to her skinny figure. It was then she noticed that the cuffs of her pants were starting to creep up her legs. She was starting to grow taller.
‘Oww.’ She raised a trembling hand to her face, watching in disbelief as her fingers popped longer, becoming delicate and unmistakably like a woman’s. ‘E-rika, what’s h-happening to me?’
Erika tried telling her she needed to lie down on the bed, but before she could Riley screamed out in pain. In a second, her legs stretched out in two massive jerks – turning from tiny twigs into long, strong branches. My friend was sent spiraling upwards on long slender legs that just wouldn’t stop growing. Her midriff became visible as her torso lengthened suddenly, her arms growing soon after to keep up.
Erika and Emily couldn’t believe it. Only minutes ago, Riley had been only about 4’0. Now she was as tall as Piper. And her growth was only getting started…
She groaned as her hips snapped wider, first the left then the right, until she had a wide pair of hips that contrasted enviously with her child’s waist. But the force of her hip growth knocked her off her feet. She fell to her knees and her black hair fell in front of her face. It started lengthening, becoming luscious and silky until it was long enough to reach the floor.
I approached her slowly, asking if she was OK. A mature, unfamiliar voice answered. ‘Oh Erika… it feels so… so… good. I’m finally growing up!’ She looked up at Erika and she saw her face was changing, going from round and pudgy to lean, angular and lovely, but still retaining something of her childish cuteness. Panting hard, she rose on wobbly, stilt-like legs. It occurred to Erika that she now looked like a gangly pre-teen awkwardly coming into her adult body. But she wouldn’t remain a waif for long.
She moaned as her calf muscles bulged impressively into existence. Her calves really were a thing of beauty! She looked down in disbelief as her body lengthened and strengthened. The growth slowly snaked up her legs as slender, feminine muscles popped and hardened. Her thighs trembled before thickening tremendously, engorging three times the size they had been. Erika thought right then that she’d grown the sexiest legs she'd ever seen.
Her hips followed, swelling outwards, gaining lots of healthy fat and muscle until she had an alluring hourglass figure. She rested a delicate hand on each hip and admired her new proportions. ‘Whoa, so womanly…’ she said in disbelief, with a voice that was breaking into adulthood.
Her shoulders and collarbone cracked wider as she was rewarded with another growth spurt that stretched the girl even taller. Now her body was truly unrecognisable for the preteen she had once been. Her yellow trousers looked like undersized booty shorts. Her shirt barely covered her chest, leaving her lovely, taut belly fully exposed. Any girl would have been delighted to grow into what Riley had become, but her true blossoming was about to begin.
Her dark eyes widened and she gasped loudly. ‘Oh! I can feel something coming…’ Her entire body was trembling and Erika saw her veins pump up as they filled with hot blood and hormones. Then it happened. All over her body, slender feminine muscles began throbbing, tensing against her bronze skin. Her vest started ripping as bulging feminine muscles ripped through the fabric, giving her a powerful, athletic body.
Sweat was trickling down her lovely tummy and I saw something moving beneath the skin. She moaned in pain and pleasure as a hardening six-pack started pressing against her skin, forcing its way to the surface. It was like an invisible hand was sculpting Riley into the statue of a Greek goddess!
Riley raised her arm and looked at her pulsing bicep. Gingerly, she flexed her arm and smiled with delight as her bicep swelled even larger, ripping the sleeves of her shirt apart. She repeated the motion with her other arm to much the same effect.
Then she raised both arms and flexed all her new feminine muscles like some fitness model. ‘Oh God, this power!’ She winced and moaned as her six-pack hardened and surged into an 8-pack, soon followed by another blast of growth and power in her legs.
The other friends could only stare in awe of what Riley was becoming. It was literally like watching puberty on steroids. Transforming their little friend from a stick insect into a fitness goddess.
Riley groaned and bent forward, as if all the air had been forced from her lungs. In the mirror they saw her cute little butt shaking before it exploded outwards, greedily taking on mass. Her shorts were ripped apart as her full woman’s ass took shape, making her lower body even more gorgeous. Erika saw the juices dripping from Riley’s overstretched shorts and she knew Riley was finally a woman.
But her womanhood wasn’t finished quite just yet. Her ridiculously tight vest was soaked with sweat and clinging to her lovingly. Erika could see her nipples spring up and become erect. I knew what was coming. She lifted her head and started moaning hard, ‘Oh Erika… what’s happening to me?’
She craned back her beautiful neck and cried out in ecstasy as her breasts exploded into existence. Her shirt started tearing down the middle as her vest-puppies grew rapidly, taking on weight and mass. She looked down in delight, ‘Oh wow… I’m bigger than my sister.’ Her breasts trembled, and doubled in size again. ‘I’m bigger that mommy!’ There was a sudden tearing sound as her shirt ripped apart and two perfect, swelling adult breasts grew to their final size in the open air.
‘Oh my God…’ she panted.
Riley was still very weak from her transformation. Erika managed to perk her up and help her put on a vest and panties. She rose to her feet. Erika gasped. Her tiny little friend was now towering over her. She had to be six foot – at least! She realized this too and curtly said: ‘I want to see myself.’
She turned to the mirror and began to move slowly towards it, her new hips swaying seductively as she walked. Disbelief was frozen on her beautiful face. ‘Oh wow… is that me?!’
"It's definitely you." Erika smirked at Emily.
Two preteen friends were now grown women.