Gary felt the stone in his hand. He finally had it back again. During the game he was thinking up ideas, but by the time he figured them out Jenny had taken the stone. But now he had a chance.
First, Biff/Buffy. "I wish that Buffy is a cheerleader because she's Biff, but there's a girls' football game and the guys are dressed up as cheerleaders as a joke only for that one game."
Next, Jon/Jenny. He hadn't had a lot of time to figure out how to fix the marriage. But he was beginning to become attracted to Jenny as if she was really his wife. He knew giving in to that attraction was bad. The best way that he could think of to fix that was, ironically, partly restoring Jon.
"I wish that Jenny is a bimbo and has a girl's mind because she was hit on the head, which made her think like one, but this is a temporary injury and she'll get better now. I also wish Jenny isn't mad about any wishes I made."
Jenny blinked. "Mr. Meadows? I remember now. I'm Jon! But I'm still a girl."
"I don't care how hot you are," said Gary, "we shouldn't be having sex. So I gave you your mind back so you wouldn't want to. I didn't know how to reverse the rest, so you're still Jenny and everyone should still think of you as Jenny."
"It won't work, Mr. Meadows," said Jenny.
"What won't work? You're not thinking like a bimbo cheerleader any more, are you? It worked. Did you mean I didn't undo the marriage? You know, divorces do exist."
"It's not the marriage," said Jenny. "It's the wish I made a minute ago. It's still going to happen. I can tell, just by looking at you, and I'm sure you can too."
"The wish you made a minute ago? You... oh no. You wished we'd have sex tonight and that then you'd have children. I...."
Jon/Jenny felt attracted to Gary. She could shrug it off--she was really a boy, after all. But Jenny couldn't dismiss the feeling completely. "You're attracted to me too, aren't you?" she asked. "Just like I am to you."
"I... yes, I am, Jon, but I should walk away and... No, I can't walk away. I can wait but I can feel the desire getting stronger. As the night goes on it's going to get harder and harder to resist." Gary looked at the stone, but already he couldn't bring himself to make a wish that might lose Jenny.
"It's okay," said Jenny, and put her hand to Gary's cheek. Then she pulled her hand back. "What am I doing? I just wanted to hold you and... How long can we resist this anyway? There are only about two hours left in 'tonight'...."