Lunges

Lauren didn't want to exercise with nothing on from the waist down... but what could she do? She was trapped, in her mind at least. She couldn't kick them out, she couldn't get dressed. Her sister was running the show, and her sadistic streak had turned it into a revealing and humiliating show for Lauren.

She was also scarred. These emotions, fear, humiliation, shame, embarrassment, were fairly new for her. She'd experienced them, but had such an iron clad grip on her life that they almost never came up. Lauren tried to think about how she was just two days ago. In her padded bra and spanx, wearing a skirt, blouse and jacket, her designer heels raising her up. Make up done to a tee, hair immaculate around her face. A softly superior look on her face.

That didn't mesh with what she saw when she looked down though. Sports bra over two minuscule breast, leading down to a swollen belly, and a bare crotch with two small hands cupping it. Farther down round soft thighs curving into calves and small feet. Helpless, knock kneed, fidgeting non stop. No confidence, no control.

So, Lauren didn't run. Instead she reluctantly, hunched over and red faced, got in line with Britney and Vanessa again.

"Good!" Vanessa smiled at Lauren's surrender. "Now that we've done our squats, let's workout the rest of our legs with some lunges."

Her and Britney stepped forward, dropping their back knee down and leaning far forward.

"Lauren, you try it."

In her dazed, meek state Lauren awkwardly extended her leg. She leaned forward, wobbling awkwardly with her hands wedged over her crotch. She could feel her bare butt flex and shake behind her.

"Good! Hold it for one... two... three... now the other side."

They stepped forward with the opposite leg. Lauren awkwardly followed. She bit her lip, breathing heavy. Her legs weren't nearly as muscled as Britney's or Vanessa's. The strain of this pose was already getting to her. She looked down. Her surprisingly thick thigh (it wasn't always that thick, was it?!) was already quivering with stress.

"Alright hold it.. hold it... now the first side." Vanessa instructed. Her and Britney easily stepped into another lunge. Lauren struggled to keep up. She was now openly sweating, her face more pink then ever.

Meanwhile Mark, acting as casually as he could, moved back so that he was behind them. There was Britney and Vanessa's spandex clad butts, muscular and appealing to be sure. Then, there was Lauren's backside. Massive and uncovered, thick and soft, with a gentle quiver to it. Now that was a sight he'd never forget!