Jeff felt a tingling in his legs as he hit clicked "Start." He felt an erection spring up as the tingles turned pleasureful, but soon his tent began to shrink as the changes set in.
He watched as his thighs grew and grew, becoming wider before his very eyes! As they filled his seat, Jeff worried if he'd even be able to get up, feeling the arms of his chair press into his now gargantuan thighs. His ass began to tingle as well, bones cracking painlessly as his hips widened to an astonishing width - they were now larger than his shoulders! Jeff was in love as his lower body continued to fatten, his pants morphing into an ovesized pair of exercise shorts - perfect clothes for a lazy Saturday afternoon, especially with thighs like these!
Soon the minute was up, and Jeff was left with his new lower body. His thighs completely filled his chair, his ass squeezed in behind it. He slowly pealed himself from the chair, squeezing out. He felt the immense shift in weight from his former legs to these, and decided to take a few tentative steps.
"Wh-whoa!" he said, feeling his soft thighs rub together, his as jiggle, and his hips swing. He stumbled a few times, relishing in the jiggling of his thighs and ass, before going to sit down on his bed. He looked down, noticing just how far back his ass spread, and how wide his new thighs truly were.
Jeff then...