Squats!

While Britney and Vanessa stood calmly, Lauren was breathing heavy, red faced and awkwardly trying to unwedge her spandex shorts from their painfully tight embrace of her crotch and butt. Ugh, it seemed like they were trying to invade her nethers with a will of their own!

"Alright Lauren," Vanessa said. "Now, the next thing to do is to work on toning down that fat backside." Vanessa said. Lauren grimaced at the words, but couldn't really argue, to her overwhelming shame. Whatever was happening to her, it made her naturally thick backside balloon out to an almost cartoonish shape and size!

Only her sister knew the truth. Besides the high carb diet she'd been forcing on Lauren, she'd been secretly forcing her to consume vast amounts of weight gain powder. It had been having a shocking effect. Over one day Lauren looked to have put on a good ten pounds, and showed no sign of stopping.

"Now, the key to getting the most out of squats is to go as low as you can." Vanessa demonstrated by squatting down, arms extended, until her butt almost touched the ground. Then, effortlessly her toned legs flexed and she rose to standing.

"Got it? Good. Let's start easy. Ten squats. One!" Vanessa, Britney and Vanessa all squatted. Vanessa and Britney, from their years of cheer-leading practice, had long toned legs which could effortlessly lower and rise. Lauren, with her thick, soft thighs? She grunted audible, barely able to rise. As soon as they were done though, Vanessa started again.

"Two!" They lowered. Lauren struggled to keep up. The lowering motion caused her wedgie and camel toe to get even worse. She rose on shaking thighs a second behind Vanessa and Britney, who instantly began the next motion.

"Three!" Vanessa exclaimed. Lauren lowered, thighs visibly warbling, spandex shorts stretched sheer.

Then...

RRRRRIPPPP!!!!!