"...because I wished you couldn't use the stone to find out anything for the rest of the day." she finished, clenching her knees to herself even tighter.
"W-Why would you wish something like that!" Jon exclaimed.
"Two reasons... First, if you found out that this was going to happen, you might have stopped it even if it endangered the time line. I know I might have. Second, because I heard this explanation so I knew I had to. You're about to not believe me when I say this, but I really am sorry about everything!" she finished.
"Why wouldn't I be--" something went click in Jon's head. "How did you know you needed to leave--" He cut himself off again. No, he told himself, she knew it because she just told him. "But then why did you not use a wish to stop Biff..." Same reason. His head hurt. "...How could all of this come from no where? Oh! I've got it. Biff's wish made you think you were planning on... um. Yeah. So you wouldn't have... no, if Biff made... Hey wait! Why don't I think it's normal that you'd want to have sex with Biff? And why do I remember you're not supposed to have long blond hair and big, um, yeah?" he asked, even more confused.
"... because ... ... you were there when I made the wishes." she said in a whisper. Jon gaped. That's what happened in the music room earlier?
He opened and closed his mouth several times. He stared at her. She buried her face in the jacket. The shift in position set loose some cum that was clinging to her ear. As it hit the floor with a soft plish, he flashed back to the scene earlier. The sounds. The moaning. Her breasts bouncing around. Biff sucking her nipples. His cock pounding in and out. The ecstatic expression on her face. Suddenly the anger he had been feeling at Biff earlier returned in spades, directed at Jennifer.
"How could you do this to me!" he railed. "How could you do this at all? You wished to get dicked by him? And you wished on me so I wouldn't interfere? What the hell is wrong with you? Was the sex really that good? Was it worth it? How are you going to live with yourself tomorrow when you're a guy again? This makes me sick! Because you got wet over the quarterback, my first time is going to be with a guy? As a girl?"
All throughout his rant, she just sat there quietly sobbing. When he finished, she looked up to him with a tear-streaked face, making eye contact for the first time. "I told you you wouldn't believe me. Just take it. You know the combination." she said, as Jon was preparing to wish she wouldn't make any more wishes.
"Fine." He said harshly. "This makes me sick. I'm out of here." He said as he stormed out.