The normally proper older sister found her hands flying all over her body, fingering and tonguing every wet part of herself she could reach, groaning in delight. But even with the unexpected touch, her attention was fixed entirely on Erika's efforts, mesmerized by the volume of the flow, which continued to rise and spread, eventually hitting the bed's frame. A pool had already formed underneath her and Erika, growing by the second, until the foot of the bed was awash.
But something strange was happening. While her arousal seemed insatiable, Jamie could feel her body becoming smaller and softer. Her clothes were starting to feel loose, like they didn't quite fit anymore. Before she could think too much about it, a massive wave of her own orgasm overtook her, spasming and writhing in her seat. Tongue extended and fingers flexing wildly, her eyes squeezed shut, her breaths quick and ragged. Suddenly her skin became very smooth, losing its tan lines and fine wrinkles, as her cheeks rounded out and her nose shortened. She continued to climax for several more seconds before it began to taper off, her now flat chest heaving as her arms and legs returned to their natural position, limp.
Just as Jamie began to come down from her climax, she realized what happened. A glance down showed her that she looked much younger, maybe 15 or 16, 8 years or so less than her actual age. Before she could much more think about it, a second wave of arousal overtook her, driving her right back up to the same peak as before, if not higher.
Now truly trapped in her orgasm, Jamie felt the effects on her body only intensify, every sensation growing stronger, every emotion heightened. The fluid between her legs flowed unchecked, pouring from her sex. With every convulsion, her youthful form twitched and flexed, adding even more liquid to the puddle, her labia distending to allow more of the elixir to escape. Finally, spent, she slumped to the floor, sprawled in the midst of her juices, unable to do anything but enjoy the delicious feeling that filled her whole being.
Meanwhile Erika's actions became even more feral. As Jamie came in and began to freak out Erika paid no attention to her sister at all, focusing only on the intensity of the waves crashing over her body. The tightening and pulsing inside of her pushed her towards another mind blowing climax and without any care in the world the little girl grabbed a hold of the nearest pillow and started shoving it against her aching vagina. She lost track of everything except for the constant desire for more and the euphoric rushes of her climax. Eventually the two opposing forces clashed in an epic struggle and her muscles locked up tightly, holding her body rigid for a moment. Just as the pressure began to become unbearable she felt the tell tale twinges in her belly that told her the torrent was coming and she cried out loudly "AAAGGGGHHH! MORE PLEASE!" Erika kept repeating the mantra in her mind until her entire body shook violently with another monstrous climax, pushing all of the air from her lungs in one go and splashing all over the nearby.
Too entranced by her own experience to even consider Erika, Jamie instead saw herself changing more. She couldn't pinpoint the exact moment when it happened, but as her second climax crested and subsided, she realized that her body became even younger. No longer a teen, but rather a child, her hips were gone and her skin took on a smoother, softer texture, matching the rest of her newly adolescent frame.
Again, her climax rolled over her in great, surging waves. Every nerve in her body sang with the intense sensations, making her arch her back and thrash her arms and legs about. The sound of her juices hitting the floor grew louder, her muscles quivering and shuddering as her release drew nearer and nearer. Then, just as it seemed she might break, a sudden sharp burst inside of her brought it all crashing down in a violent cascade. Every drop of her fluids, stored deep within her core, seemed to rush forth in a single moment, sending jets of her sweet nectar splashing across the floor and covering the lower half of her body. Unable to move or speak, Jamie simply laid there panting and moaning softly as her climax gradually faded.
At the same time, Erika felt like she had died and gone to heaven, this feeling was the best thing she had ever felt. It felt like there was a mini explosion inside of her as the next orgasm took her and it only intensified as the pleasure radiated through her whole body. Erika kept yelling and moaning louder and louder, clawing at the sheets as the pressure inside of her became too much. Erika let out one last earth shattering scream and finally relaxed as the climax slowly started to wear off. Her muscles became a little bit sore as the contractions subsided but the pleasure kept flooding through her. It never seemed to stop.