Despite the incredible strangeness of it all, Karissa held her own tiny self to her bosom and rocked the toddling girl in her arms gently. "There, there, little one. There's no need to cry."
Sniffling, Mitch looked into Karissa's eyes and confusion overtook her young face.
"Wha' di' yew do ta meee?" Little girl Mitch whined.
"I-I don't know." Karissa responded, wiping the little girl's eyes and carrying her to the bed. Suddenly realization hit Karissa and she blinked. Was it possible? Could it be?
"Hold on a second. I want to try something, okay? Just stay calm." Karissa whispered.
Mitch blinked and wiped her eyes, still sniffling.
"Grow up, Mitch!"
Mitch blinked suddenly as an odd tingling overtook her young body. Both gasped as sure enough, Mitch's body obeyed the command. Karissa was now holding a rapidly growing little girl on her lap. Soon she was staring at a much bigger 4 year old with little girl panties.
"It's working!" Karissa said in breathless wonder.
"I'm growing back up!" Mitch joined in the disbelief and the two just sat and watched.
Mitch grew and grew in Karissa's lap and soon she had become a pre-teen, just starting to gain womanly shape. Another spurt flew by and Mitch was a young teenager, just starting to gain womanhood. They both blushed as Mitch began to fill out as he grew, getting sexy womanly curves, big tits, and white lace panties.
Soon Karissa had a full grown copy of herself facing her while sitting with legs wrapped around her waist on her lap. They both blinked, deep red and blushing.
"Are my boobs really that big?" Karissa studied the copy's nude chest, and went wide eyed.
"I'm not sure if I should be turned on by this or creeped out." Mitch finally said.