Unknown to Joan, someone was looking at her through the living room window. In fact, he had been keeping an eye on Jon's family ever since the mysterious stranger replaced Jon's wishing stone with one of The Alternate Stones, and then gave the other one to Jon's mother Joan.
He was well aware of how The Alternate Stones worked, and knew that if he didn't do something, Jon's mother would practically lose her mind, witnessing a foot-long penis growing from between her legs. Why Jon would make such a stupid wish was beyond him, but the deed was done and wishes couldn't be reversed ... even with The Alternate Stones. But there was one thing that he could do to help and that was to manipulate Joan's mind to make her think that her current state was normal. At least she wouldn't be freaking out.
He turned away from the window and watched Jon walking towards the school. Jon was quite a distance away, but he could catch up with him. Following Jon wasn't the problem, though. First of all, there were two stones and he couldn't stay with both of them at the same time. He could do small things like change people's memories, but he couldn't make another version of himself. And second of all, the mysterious stranger (who's name he knew was Sylvester) could be watching, and he was very powerful and very dangerous. If Sylvester ever found out that he was helping Jon ... well, it wouldn't be good.
Shrugging off his fears about getting caught, he sprinted off towards Jon, hoping to catch up with him before he used the stone again.