Jen screamed in fear as a body collided with her. The tackle knocked her to the ground and sent her rolling. She came to a rest on her back, her eyes wide open in fear. She tried to get up, but couldn't move her arms or legs - it felt as if they now weighed tons. The only part of her that could still move was her head. She looked up and down her body to see the curse-controlled Stacy body tearing off her shorts.
"Oh god... please no..." Jen whimpered
"No no NO NO!" "STOP!" "NOOO!" She looked over to her left and saw the 3 Stacys who weren't being controlled by the curse running towards her. Suddenly Jen felt hair pressing against her vagina. The 3 Stacys slowed to a halt and stood there, watching Jen. She felt her vagina expand as an entire girl's head pressed forward into it. Spikes of pleasure surged through Jen's entire body, unlike anything she had ever felt before.
The head moved deeper and deeper into Jen until its shoulders were caught with Jen's legs. When that happened, it stopped moving and Jen's legs started to merge into the torso of the body attaching itself to her, generating even more pleasure. All the pleasure prevented Jen from thinking rationally, keeping her floating in a state of pure pleasure. Her legs rapidly absorbed, distributing their mass into the new torso's breasts and filling the remaining area between where Jen ended and the torso started.
She felt her flesh shift and rearrange. Her hips and pelvis reformed into an extended length of abdomen that finished the connection between Jen and her new lower torso - formerly one of Stacy's 4 bodies.
As the merge progressed, Jen began to receive sensations and feelings from her new lower torso. She felt the cold gym floor under its - no, her new butt. She felt her lower torso's chest moving up and down in a breathing motion. Her new toes curled and uncurled and her new vagina twitched with arousal. Now that the merge had finished, the pleasure faded away.
Her body sat up at her upper waist. Jen experienced for the first time, the sensation of both being upright and laying on her back. She looked down and saw her new lower torso. The skin tone and muscles had shifted to look like they belonged to Jen. Her lower torso's breasts had grown to be 2 cup sizes larger than her original torso's breasts.
Jen's upper arms moved of their own according, ripping off her tank-top and bra. She was still coming down from the mind-numbing pleasure and barely noticed. The only thing she noticed was that she felt more natural and comfortable now than before.
Despite the merge having apparently finished, she still couldn't move any part of her body beyond her head. She looked over at the 3 Stacys standing immobile and unmoving and waited uneasily as rational thought slowly returned to her mind.