No. Sarah's transformation continues (Futanari)

Before Adam stood a hulking amazon muscle goddess, at least 6 feet in height, if not more. And it looked like this was finally the end of it. The end of his sister's transformation.

But Sarah's hadn't achieved climax yet. And her belly was still bloated and full of her brother's overdosed cum. She continued to masturbate, continued to pleasure herself. Feverishly, tirelessly, fisting herself, rubbing her pussy and engorged clit, squeezing her newly grown humongous breasts, tweaking and pinching her thick and unwieldy nipples. Sighing, groaning, moaning, in a combination of frustration, of her denied release, and ecstasy, of previously unknown pleasure made possible by her new "Growth X" enhanced body.

Adam himself was equally spurned on, his eleven inch shaft by now glistening wet with his precum, both of his hands stroking up and down his sizable length. He was so turned on by the sight of his transformed sister, the only thing on his mind was his wish to fuck her. "Come here Sarah!" Adam ordered in a commanding voice, that was so full of confidence and only made possible by his experiences throughout the day. The submission of the boys in the shower. The submission of his own sister. Made possible by the knowledge and trust that his improved and extraordinary big cock was irresistible.

But Sarah looked at him, and just shook her head.

Adam was irritated at her refusal, but thought nothing of it and renewed his command: "Come here, Sarah. I want you to ride my cock!"

But again, Sarah just shook her head, and rather continued to focus on her own pleasure. And that's when it happened. That's when Adam saw it. He saw it, because Sarah had stopped fisting herself, and instead seemed to focus on her clit.

Her clit, that had already been engorged to about two inches, continued to grow. First to three inches. Then to four. It almost looked like a small dick now. A small dick the size that Adam himself had been cursed with only a day ago. But it didn't stay that small. Sarah had started to rub and squeeze it with one of her strong hands, and it still expanded. It's development even sped up. Soon it was big enough that Sarah needed both of her hands to encompass it. She kept stroking it, and it simply didn't stop.

Adam gasped. Not only had his sister grown a huge cock, not unlike his own, but he saw something else that he had missed so far, namely two balls that had appeared right under his sisters radically changed clit. And neither his sister's cock, nor her balls showed any signs of slowing down their expansion.

By now Sarah was feverishly stroking her growing shaft, that rivaled her brother's not only in size and girth, but also in production of precum. The motions of her hands spread it around, making it shiny and wet, and easier for her hands to glide all over it. Thick veins formed on the surface, and the mushroom tip assumed a deep shade of red. Sarah was moaning like a bitch in heat. She was still longing for release, she tried everything to bring about and achieve climax. But her transformation wasn't done. Not by a long shot. Adam by now had stopped any motions, sat down on his bed and only stared mesmerized and in disbelieve at what was happening right in front of his eyes.

Soon the size of Sarah's altered clit surpassed even the cock of her brother. Sarah's balls as well had advanced to the size of large oranges and hang down to her knees. And not long thereafter, the magnitude of Sarah's girlcock was far beyond any comparison to her brother's much smaller dick. Adam's "Growth X" improved eleven inch dick, that previously both of the siblings had thought of extraordinary large, now simply paled in relation to his amazon sister's futanari rod, that had grown so bulky, hefty and colossal that it was even longer, bigger and fatter than one of her own very powerful and thick arms. Both of her hands were no longer enough to encompass it's girth. She gave it a few more strokes, but then she suddenly stopped. Was her transformation finally done?

Sarah removed her hands from her enormous shaft, and without their support it slightly and slowly dropped down. The size and weight made sure that her truly massive girlcock wasn't sticking straight up towards her equally tremendous breasts, and instead it came to rest and was limited to an almost horizontal position. A position, where it's tip pointed straight at Adam, and it's strength and tension made sure that it didn't lower further, despite it's substantial weight. With veins sprouting all over its surface, it looked both intimidating and hypnotizing, but still something else managed to draw Adam's gaze upwards.

Sarah felt it. Her indescribable boner was aching, her whole body tensed up. It was time. She arched her back and raised her arms. Her hands closed to fists, her underarms and hands pointing straight up, putting the attention on her flexed upper arms, her bulged biceps. She was truly a goddess. A futanari goddess, who continued to flex her immense and powerful muscles, her chest with mountains of bewitching breasts, who started to wiggle, jiggle and shake. Her unreal mass of futanari flesh, her towering and absolutely outstanding erection, that started to swell and throb. Just by the anticipation, strain and exertion of her body, Sarah finally achieved the climax that she had been waiting for. And she came violently.