...his little sister.
Jeff felt a rubbing and squeezing sensation in his legs, as if dozens hands were wrapped around them and pressing into them in a sensual massage. The sensation continued up over his ass and his crotch, giving him a stiff throbbing erection. Overwhelmed by the pleasure of it all, he shut his eyes and leaned his head back. An ecstatic moan escaped his lips more than once as the sensations increased.
"Oh, God!" Jeff gasped. It was almost too much to take.
Seconds passed as Jeff was gripped in near orgasmic pleasure. The squeezing feeling grew to the point that it seemed as if his lower half was being compressed. He could vaguely sense that his legs were getting thinner and his ass was narrowing. He could feel his feet slide closer to the chair as his legs became shorter. Although he remained rock hard, he could feel that his dick was shrinking as well.
His underwear contracted tightly against his shrinking ass and dwindling crotch. His jeans seemed to melt and cling to his legs, while more fabric grew down from his waist over his thighs. Something wrapped around his ankles and over his toes, pressing up against the soles of his feet.
The pleasure grew to a peak, and Jeff felt as though he would come at any moment. Then, he gasped as he felt an odd pulling sensation in his crotch, like a sock being turned inside out. It felt even better than coming, that final moment of turning female.
Finally, the pleasure faded away as the transformation completed. Jeff gradually caught his breath. He wondered. Had that really only been a minute? It had felt like an hour.
At last, he looked down at his transformed lower half, his mouth agape. He had a little girl's legs! They were so skinny compared to his old legs, and his little feet barely touched the floor now. He pushed himself back from his desk and swung his chair around for a better look. Covering his thighs was a blue skirt with white polka dots. Under that he wore a pair of pink tights that clung to his hairless legs down to his ankles. He lifted up a leg to see a brown leather sandal strapped to his little girl foot.
"Wow!" he said. "Look at my little toes." He twiddled his little pinkies and giggled.
Then, Jeff frowned a moment. There was something familiar about these clothes, but he was not sure why. He noticed that his head felt a bit fuzzy all of a sudden, like his thoughts were having trouble connecting together. He tried to remember where he had seen this outfit before.
Then, it hit him.
"Emily!" he said. His 10-year-old little sister, Emily, had been wearing this exact same outfit. He remembered seeing her in it this morning. This was her lower half. He had swapped with his own little sister!
Thinking about Emily seemed to join up some of the disconnected thoughts in his head. Although Jeff did not move, her perspective seemed to shift all of a sudden. Instead of feeling that her legs were out of place, it seemed that her upper half was the wrong size. Her chest felt enormous and her arms seemed like they belonged to a gorilla, what with how long and hairy they were. "Oh, that's weird," she said, noting how strangely deep her voice felt. She looked around the room. "What am I doing in here?" Jeff asked herself. This could not be her room. It looked like it belonged to a teenaged boy. "This has to be my brother's room. This is all Emily's stuff." Jeff started to worry about getting caught using her big brother's computer without asking. What had she been thinking coming in here with the Chronivac? She could get in trouble for this.
She slid off the desk chair. Her little legs wobbled a bit under the weight of her oversized upper body, so she braced herself against the desk with both hands to regain her balance.
Then, she heard something.