Nothing happened.
Both siblings looked down at Sandy's body, then at Kyle's just in case he had changed, then back up into each other's eyes.
"Well,..." he began, not knowing what he actually wanted. Sandy was the exact size he wanted her to be, but he was curious how much bigger she would have gotten.
"Maybe it takes a bit longer the second time?" she said.
"Maybe." he answered, with a streak of disappointment in his voice.
"Oh, don't be sad." Sandy said and gently squeezed her twin brother into her hefty frame. "I'm so happy to have this new body, I couldn't imagine that being bigger would make any difference."
She leaned forward and placed a quick kiss on his lips.
"Thank you, brother."
They released their embrace and each took a step back, looking at how they both had grown. Sandy all over with luscious girl-muscle and Kyle in the crotch area with a big bulge in his trousers. She was simply amazing and impossible not to look at.
Her feet looked larger than before, now about the same size as his. Kyle didn't have a foot fetish or something but he found the thought that this was another sign of her new power very stimulating. His eyes wandered up, to her calves that were protruding left and right from her legs, completely visible even from the front. Then there were her enormous thighs with cords of meat producing wide, heavy balloons of muscle, fighting against the elastic material of her workout shorts. With the added bulk of the pair of massive quadriceps, they looked a lot smaller in comparison, reaching only halfway down to her knees now. Kyle could only stare at the wide hunks of beef that made up her powerful legs.
Sandy noticed and smiled before grabbing the pants legs and pulling them up to reveal the maximum amount
of female muscle. She extended one leg and placed her foot firmly on the floor, then suddenly flexed her quads as hard as she could, making them explode with hard tissue. Kyle gasped at the unadulterated display of pure brawn by his sister, which in tum had her giggling at the ease of which she could now excite him. When she relaxed again he continued his journey over that amazing body and arrived at her belly, covered in her workout shirt. Obliging her brothers fetish she took the bottom of her shirt and pulled the thing off her body in one quick motion, revealing herself in all her glory. This time Kyle moaned loudly instead of just gasping, as once again his own sister was confirmed to be his perfect dream amazon. The view was so amazing that it never crossed Kyle's mind to go out and transform any girl he stood a chance of kissing and then feeling her muscles as he was fully transfixed on Sandy's amazing body.
Rather than giving him a quick posing routine, she decided to let him take in her muscularity in a relaxed
state. Still, the deeply carved edges of her abs were too incredible to describe, looking like she kept them constantly flexed. Her breasts looked so large, amplified by the thick pecs that raised them up and out to new heights. A new cleavage of striated muscle continued the sexy cleavage by her soft tits and added an air of enticing strength to the feminine package of power he was looking at. A pair of balls for shoulders flowed into arms with biceps that jutted from her arms even though they were completely straight and unflexed, just like her triceps that formed thick pipes of raw meat to big to encompass with one's palm. Below were her elbows that introduced fleshy forearms twitching with every slight movements of her now large hands.
Hands? Kyle realized something.
"I kissed your hands before." he exclaimed. "It could be that I need to kiss you there again."
Sandy smiled again, eager to try out this theory if it would make her grow even bigger and extended her arms towards him. He wrapped his fingers around her biceps and took her hand, bringing it to his face. Just like before he placed a dainty kiss on the back of her hand and waited what would happen. Even if Sandy would stay the same, the feeling of her rock-hard biceps in his hand was more than worth the minute standing still.
But, again, after some time of no change they let go of each other, disappointed that his powers apparently only worked once per girl, but excited that they had a whole new body to explore. It was then that Sandy spoke: