Kate felt a shifting happening. A slight drop in his/her stomach.
“Yes!”
Only for a medium sized fart to come out.
“Dammit”
I thought this was it. Then his/her body shifted again but a familiar pain came back although it wasn’t as intense this time. She felt her black hair start to lengthen and come down to her mid back. She grabbed her little member and watched as it sucked back in. Her blue eyes came back and then it stopped.
“What?!” She said looking down at her flat chest.
Kate looked through the full length mirror. She was a girl again but she looked exactly like she did when she was eight years old. John woke up from the nap, his head still hurting as he was in the middle of the copy phase very close to becoming a clone of Kate. Before he could speak he felt something. John grabbed his vagina and felt a familiar sensation coming back. He moaned as his penis came back as it was longer and thicker. His breasts deflated and became a nice set of pecs. His blonde hair fell off leaving him bald, only for his black buzz cut to regrow. He just experienced another puberty. John was now a 17 year old version of himself while Kate became an 8 year old version of herself.
The two swapped siblings looked each other. They were the right sex this time but not the correct age.