"Listen to me. I'm not Karyn. This stone," Jon said, holding up the wishing stone. "It's magic. I accidentally ..."
His mom snatched the stone from his hand and held it up forcefully. "Like I could ever buy that for a second. If you're going to make up a story, Karyn, make it more believable. Now, where is my son?"
"He's ... uh ... not here, technically."
"Where did he go?"
Jon wasn't sure, actually. Yes, he was still Jon, but only mentally. He wasn't sure where his body went. He assumed that Karyn had it now, but he didn't know for sure.
"Oh, I wish Jon was here," Jon's mother suddenly said, grabbing his attention. "I really need to give that boy a stern ... hey, what's happening?" she said, feeling the stone grow warm in her hand.
Then, in the blink of an eye, she had a different body. She had Jon's body. It was the same thing that happened to Jon earlier, when he suddenly had Karyn's body. Jon's mom was already shocked from catching Karyn playing with her pussy in her son's bedroom. This newest development was enough to push her over the edge. So she promptly fainted.
"There's my body," Jon mumbled to himself.