Jon didn't have to think very hard. "I'd like you to be Japanese, and have big tits!"
"Oh I didn't know my big brother had a thing for Asians," Zoe cooed. "But if I must..."
Zoe closed her eyes and envisioned a Japanese woman with large breasts. Immediately, her body began to remold and reshape into what she saw. Her jaw structure softened a tad more, and her boobs enlarged slightly, her skin already pale because of her goth look. It was a quick and easy change, she had made similar ones many times before.
"Um, Zoe?"
Zoe opened her eyes to look at Jon, and snickered at what she saw there. From the neck up, Jon was completely normal, even with the worried expression on his face. But from the neck down, he had the body of a busty Japanese girl, complete the right equipment. From the neck down, Jon and Zoe had the exact same body!
"Zoe! What did you do to me?" Jon was really concerned. When he had made that magic pencil, he wanted to gain control of other people, now almost everything about him was being controlled by someone else.
"I...I don't know!" Zoe was being honest, she hadn't expected this. But she enjoyed seeing Jon in such a predicament, and had more thoughts of changing him even further. "I guess when you absorbed my arm, you absorbed my morphing abilities as well, except I control it and not you!"
"Change me back!" Jon almost yelled. "I don't want to be a girl."
"Well you are one now. Stand still okay, I want to complete the changes."
Jon took a step back. "You want to what? No, I won't let you."
Jon found he couldn't take anymore steps back; Zoe was controlling his body again. "Please stand still, Jon. I won't hurt you."
Zoe removed her own hand as she had done before, but placed it on Jon's head. With an effort of will, she forced her own hand to melt and ooze over Jon's hair and face. Jon could only close his eyes and mouth, and wait for Zoe's hand to envelop him down to the neck. But soon, he didn't feel anything at all, and he thought it was once again safe to open his eyes. He hadn't felt any changes yet though.
"Wonderful," Zoe exclaimed. "Now let's change your face too!"
Zoe once again envisioned the face of the Japanese woman in her head, and watched as Jon's distraught face morphed to match it.
"Zoe, this is really weird."
"I know! But it's exciting too! I'm learning new things about my abilities all the time thanks to you." Zoe paused. "Your voice still sounds like you though. I wonder if I can change that..."
Jon was still worried how much control Zoe would eventually have over him, but he was resigned to the fact that Zoe would want to experiment further with him. It's not like she would be changing him all the time. Right?
Asian Zoe looked thoughtful for a second, and then reached over to her newly regrown hand and pulled off the last digit of her pinky finger.
She offered it to him. "Here, swallow this."
Jon found that he had the ability to move on his own again, but still moved to grab the finger anyways. He was done fighting his sister for now. Besides, he was a girl now, and how often would he be able to experience something like that? He swallowed the finger, but felt it dissolve in the back of his throat.
"So, did it do..." Jon coughed. "Did it do anything?... Oh wow!"
Jon voice now matched his womanly body: soft and sultry and ready for sex.
