The green glow hit James first. It felt like the same feeling one felt when your foot fell asleep, only all over. He reached for his wife's hand, but noticed something and stopped. His eye level was getting closer to hers, but he wasn't crouching down. Suddenly, he was looking up at her. "What the..." He started, his voice cracking halfway through the sentence and heading up a few octaves. In a matter of seconds, he'd lost about a foot of height, making him around 5 feet tall. He was now swimming in grossly oversized clothes as the next bit of transformation began to affect him. James was horrified as he felt the lower parts of his anatomy start to retract into his body. Breasts erupted from his now smooth, hairless chest. Shoulder length hair pushed out from his thinning scalp. His face remained mostly the same, but was softer, more rounded, much younger, and visibly girlish. Although his attire had remained the same, James was now physically the person he would've been if he was a girl around his son's age.
"Woah," Jeremy said, staring at the hot girl his Dad had become. He didn't notice his kid sister was undergoing a reverse transformation. Her small t-shirt and shorts were now stretched to the breaking point as her body erupted upward, as she gained nearly two feet, making her well over 6 feet tall, taller than James had been a few seconds before.
"I'm big," Cindy declared. Everyone turned from where they had been focusing their attention on James. Jeremy looked shocked. She was taller than he was. "No more picking on me, LITTLE brother," she said, giggling...which went down a few octaves, turning into a deeper chuckle.
"Cindy, this is not a joke," her father said in a high pitched teenage voice. The long hair on Cindy's head was beginning to largely disappear into shortly cropped buzzcut with a bit of grey at the temples. The small breasts she had once had disappeared completely into a lean body, which was rapidly becoming hairier. Stubble began to form around her face as it too became leaner and rougher. Cindy was now physically the person she would be if she were a middle-aged man.
"Stop this!" Laura insisted to the hag. That didn't seem to help, but the old woman did turn her attention to Laura herself, who started to shrink and deflate as if someone had let the air out of an inflatable doll. Where her daughter had aged, she gained youth, rapidly descending until she was physically the person she would have been if she was a boy around her own daughter's age.
Jeremy, the last one left standing, looked over. "Can't we make some kind of...deal?"
The witch cackled. "I'll think about it," she said. "Maybe later." His face also grew older looking and more plump, with a thin tracing of barely visible wrinkles and crow's feet suddenly developing. But there was something femininely mature about his face now. His body grew a bit fatter (especially around the thighs, hips, and ass), and decidedly more womanly. Finally, Jeremy gasped with audible surprise as enormous mounds of flabby, fat, flesh suddenly sprung out of his chest. He now had the breasts of a middle-aged woman, although he wore it differently than his mother. He was now physically the person he would've been if he were a middle-aged wife and mother.
“Very good!” cackled the old crone. “Oh, I've gotten so bored over the years. It's fun to have visitors to entertain myself with!” Apparently, this was all just for the entertainment of an insane, old witch.