"I wish Sarah's 16 years old again," said Karyn. She looked at the baby and half expected it to grow and gradually get larger, but that wasn't what happened. Instead she felt she couldn't look straight ahead, blinked, and when she looked again she saw that instead of the baby there was a girl standing there. She looked something like what Sarah used to, though she was a brunette, and since she was Chinese, there was a limit to how close to the original Sarah body she could be.
Then Karyn heard someone stumble. She glanced over at Jon. Jon was no longer in a bed; she had tripped and was getting up. Probably because she had just instantly gone from being in a bed to standing and was surprised enough to trip. She was still Jonnie and still Chinese... and something was wrong.
"You look older, Jonnie!" exclaimed Karyn.
Jonnie looked herself over. "Not that old," she said. "Maybe 25."
"I think you look great, Mom," said Sarah. "But not 25! We both know you're older than that."
"Jonnie," said Karyn, "I think I messed up. If Sarah's your daughter, and she's 16, you can't be 16."
"Don't be ridiculous," said Sarah. "Mom can count. We both know she's not 16."
"But I mean the stone had a side effect... Aging Sarah aged you too, Jonnie, so it makes sense."
"Is that Karyn girl on drugs?" asked Sarah. "Mom, let's get out of here. This is so not cool."