Strip down and dress

Vanessa guided Lauren into a changing stall by the outdoor showers. As soon as the door was closed Vanessa began slipping off her clothes casually. Under her clothes she wore a form fitting bikini. Lauren was shocked to see her sister seemed to be growing ever hotter. She didn't know that her sister had been hitting the tanning salon and using a physical trainer, putting her at peak physique. This was the opposite of Lauren, who'd been putting on weight since this all happened. Lauren squirmed with envy, her face a comical frown as she stared at her sister's statuesque body.

"Let's put your swimsuit on," Vanessa said, turning to Lauren. She stepped forward and whisked Lauren's blue shirt off, smiling as she saw the tight, undersized pink bra over her chest. Then, without any preamble, she yanked that off as well. Lauren stood topless and flustered a moment before Vanessa quickly and deftly pasted her, yanking her shorts to the ground to reveal her my little pony panties. Those two were pulled off, leaving Lauren pale, quivering and fully nude.

Then, Vanessa drew the bathing suit out of her bag. She put it around Lauren's ankle's and pulled it up. The suit slid over her legs, but found itself tightly stuck around Lauren's hips and butt. Vanessa had to yank and pull to get it up. Then, the suit was so small Vanessa struggled to get the shoulder straps up, forcing Lauren to hunch awkwardly when it was in place.

"There, all done!" Vanessa said as Lauren looked down at her new suit in dawning horror...