Sara touched the medallion to a sock, then touched it to her own skin. She shuddered. The changes began.
Almost immediately the stretched-out boxers and undershirt she was wearing began to loosen up. Her height increased a little as her shoulders broadened. Hair popped out on her legs, which were changing shape and growing more muscular by the second. Her big behind deflated as new anatomy dropped into place in front. Her mouth fell open and her hands dropped to her groin.
"Mom!" Andrew yelped in his mother's voice. "Hands off until you're alone!"
She blushed and whipped her hands away. "Sorry, sweetie. It just feel so...different!"
"Tell me about it! But you don't see me groping myself, do you?"
Her breasts had by now retreated into her chest, which was broader than it had been. Her long blonde hair pulled back into her scalp and changed color slightly, becoming Andrew's haircut. Her face got thinner, more angular. Her jawline lengthened. A few moments more, and she was a perfect replica of her teenage son.
"So, {Andrew/i}, how's it feel being me?" Andrew asked, looking up into his own face.
Sara smiled down at him. "It feels good to be young again," she said. "Whoa, my voice sounds weird."
"Yeah, I know what you mean," said Andrew. "I don't sound like you to myself. I guess everyone's voice sounds different in their own head." He happened to glance down, and saw something protruding from his mom's shorts. "Ugh, gross, Mom!"
She looked down at herself and blushed again. "Sorry, honey. I guess this just has me all excited."
"Yeah, I can tell. Do something about it!"
"Oh, but, um," she stammered, gingerly touching herself. "It's...it's so stiff!" She worked up the courage, and hastily tucked it in. It didn't do much good.
"Okay," said Andrew. "That's enough for one night. I'm going to bed."
"In your own bedroom?" asked Sara. "Know what I mean, Mom?"
"Oh, man! Do I really have to sleep with Dad?"
"It would be kind of strange for him to wake up next to your body, don't you think?"
"Fine, I guess so. Just don't do anything...weird...with...you know."
"I know," said Sara. "I'll be a good houseguest. Same goes for you too, of course."
"Of course!"