"...and right now, if you want me to be a kangaroo, then I want you to be my joey!"
Jon, mouth agape, began to change in much the same way Karyn had earlier, sprouting fur, and a tail. But Jon started to shrink as well, and as the world grew arorund him, Karyn bounded over, looming above him looking down as he shrank away from her. When he was finished changing, he looked up at Karyn who now seemed like she was over 18 feet tall to him. But he knew that was because he was now far smaller than he was before.
"Oooh... you're so cute like that!" Karyn crooned at him like he was a baby... which he realised he now was. Jon, frightened now because he was so little, shook uncontrollably.
"Aww... is widdle joey scared?" Karyn said to him in a soothing voice. "Come here, momma roo will make it all better."
Karyn then pulled Jon closer to her, and when he saw her pouch, his newfound instincts took over, and he immediately clambored up inside. Karyn, not expecitng this, froze as soon as he started climbing into her pouch. Interesting new sensations flooded her brain as Jon climbed inside, and she found herself feeling a fullness that brought her pleasure knowing her baby was safely inside her.
The pleasurable feelings clouded her mind, and Karyn realised that as long as Jon was in there, she wouldn't be wanting him to change back. She hadn't expected this to happen!
Meanwhile, inside Karyn's pouch, Jon's fear quickly subsided, and he was lulled to sleep by the warmth and Karyn's heartbeat.
Karyn, feeling Jon stop moving around, picked up the stone off the ground, and placed it in her pouch with Jon so she wouldn't lose it. Then she laid down on the ground to rest and think.
"Hmm..." she thought. "I wonder what we should try next. And I've got to figure out some way to reverse Jon's wish so that I don't have to be whatever he wants me to be."
Karyn sighed, and not thinking about what she was saying, said "I just wish..."
