Dan felt his influence over her lower body diminish until he was barely even aware of her pussy. Soon even that was gone. He felt nothing, saw nothing... He barely registered a thought. Suddenly, a body began to form. It was very small, very weak. He was trapped somewhere warm and damp. It wasn’t like before. He tried to move. He managed to go downward. His consciousness was returning but the body didn’t feel like his. Where was he? It was so dark there. There's an opening. Must escape.
Kat carefully stood up. She couldn’t sense her brother at all. Her pussy was motionless and she began to worry. Suddenly, her stomach expanded, pushing her lower six breasts aside. She had spontaneously become pregnant and could feel something trying to push free. As the growth pushed and poked at her insides, her breasts began to lactate. It was a weird mix of pleasure and pain as the creature forming inside found her opening.
Her pussy stretched painfully and a tiny hand reached out, followed by another. The hands pulled apart her labia to make room for a tiny head. She breathed hard and pushed. She couldn’t think about anything, she just needed to get that thing out of her as soon as possible.
With a violent pop a child emerged and slid across the floor in a puddle of afterbirth. Kat fell backwards and passed out.
The tiny version of Dan writhed on the floor. He coughed up some strange fluids and felt blinded by the bright lights in the room. Once he had adjusted, he looked around to assess the situation. He had escaped the damp cave, but everything around him was huge. He spotted his sister. Her shirt was soaking wet around each of her breasts and her stomach seemed unusually flabby. A trail of blood and puss stretched from his feet to her crotch. Her pussy sagged open and looked awful. Nothing like it had been whenever he saw it in a reflection.
Staring at his unconscious sister made him realize what had happened. Did she just give birth to him? He thought back to the spell and realized that one of the lines referenced something like being reborn. He puzzled over the situation and wondered how he’d deal with his minuscule stature. Fortunately that issue didn’t last long. His body was wracked with pain as his bones grew. His skin stretched and hair formed on his head. It was excruciating, but lasted only a few minutes.
The pain nearly made him pass out. When it stopped, he was back on the floor in the puddle of vaginal discharge. He was back to his usual size. More importantly, he was separated from Kat...