Zoe and Jon stared at each other defiantly, but neither made a move.
Zoe smiled as she got an idea. Two of her hands moved to her crotch and began to stroke her shaft up and down. She didn't quite know what she was doing, this being new equipment and all, but she didn't have too much difficulty getting herself hard.
Jon watched in fascination. The bet temporarily forgotten, he took an unconscious step forward.
Zoe's smile broadened, she began walking slowly towards Jon, who made no attempt to back away. Zoe longed to touch Jon's breasts, to lick and suck on them, but she was on a role. And masturbating to the sight of Jon's body was almost as good as experiencing it first hand.
She walked up until she was less than a foot away from Jon, still massaging her cock. She watched as Jon's hand seemed to move on its own accord. She removed her own hands from her cock and let Jon's hand come closer and closer. She held her breath.
When Jon laid a finger on tip of Zoe's dick, it was like touching an electric fence. He yanked his hand back, completely out of the zone he was in.
"What did I...?" he began.
"You lost, sis!" Zoe called triumphantly.
Jon's body was already changing. He looked down to his legs, which were becoming long and shapely. He rubbed his hands along them, they were smooth to the touch. His feet shrank several sizes and so did his height. The last thing he felt change was the receding of his own cock. A pulling sensation was the last he felt of it and he knew it was gone. If he looked, he would find he was now a fully functioning woman.
The need was almost instant. It was like she was missing part of herself. This new body felt wonderful, and Ashley was in love with it, but the need felt like a physical craving. Her crotch began to warm and Ashley bit her lip at the thought of finding something - or someone - to fill the ache between her legs.
And that's when Zoe decided to remind Ashley of her presence.
