Before finishing his wish, Ty looked to his right, to Peter's head on their shared shoulders. Peter nodded, meaning that he would agree with any wish that Ty was going to make, as long as it meant getting back at Dustin for fusing the two into conjoined twins. And Ty knew exactly how to do it.
"I wish that you were fused with us!" Ty said, though this was not the full extent of the wish.
After a flash of light, only one body remained. It was a wide body, though not any taller than it had been. It had been shared by two boys, but now there were three heads on the body now: Dustin's was on their left-hand side, Peter's on the right, and Ty's in the middle. All three were now fifteen, the age that Ty was at the beginning of this story.
"What the...?!" Dustin shouted. "How did you do this?"
"You said it yourself, Dustin," Ty explained. "You said that we couldn't unfuse ourselves unless two people with the power concentrate. Since Peter is now in my body, we share that power. And I knew that Peter was concerned only with getting you back, so I focused on that in my wish."
"Well, I wish that I wasn't stuck to you anymore!" Dustin smiled confidently. His smile faded, however, when no flash appeared. He noticed that he was still fused with his brother and Peter, and tried to move away from them out of desperation. But he couldn't move, either; he felt nothing below his own neck!
"Nice try, Dustin, but I knew you would do that," Ty smiled devilishly, "so I wished that you would be unable to move anything but your head while fused with us, and that you would be unable to use your power to unfuse from us until Peter gets his power back from you in another day. Ha!"
"This is a great idea, Ty," Peter added. "And I think I'm getting used to sharing a body. If Dustin can't control anything, what about us?"
"You control the right arm and leg, I control the other, and we're able to operate as if we have been like this our whole lives," Ty answered.
"Except me!" Dustin added. "And I still have Peter's power!"
"Didn't you hear me, Dustin?" Ty said. "I said that you would be unable to use your power."
Dustin froze. This meant he was basically a hostage held in a shared body with two other people.
Dustin prepared to shout out for help, thinking that someone would hear him and investigate. But as he started, he found he was unable to produce any sound--once again, Ty's foresight had come through.
It would not be until tomorrow afternoon that any of this could be undone. Peter would get his power back from Dustin from then, and he and Ty would be able to reverse their conjoined state then.