Hit the showers

Vanessa was panting, from exertion and humiliation in equal measure. Her pale, slightly pink skin gleamed with sweat and her hair was a frizzed up mess.

"Man sis, you're already out of breath?!" Vanessa exclaimed. "How out of shape are you? That was just like, five minutes of exercise."

She really didn't have to point this out. Lauren's thickened, rounded body was proof enough how out of shape she was. The truth was, Lauren didn't exercise much. She just didn't enjoy it. Hench the spanx and weight gain. Well, thanks to her sister who had been secretly giving her weight gain powder, Lauren was now both nearly nude and more out of shape appearing then ever!

"I guess that's enough for today." Vanessa said. As much as she was enjoying Lauren's humiliations, she didn't want Lauren actually managing to burn some fat, and undo all her work fattening her up!

"Go take a shower." Vanessa said to Lauren. "You're covered in sweat."

Lauren was happy just to get out of sight. So happy in fact she thoughtlessly turned and walked towards the bathroom. This exposed the entirety of her shockingly thick backside to the room. Mark tensed, feeling himself stiffen at the sight. That large, pale and pink butt, shaking gently, warbling with ever movement, slightly flexing but so thick it moved in an inviting wobble.

"Nice butt, chubster!" Britney called out, laughing. Lauren realized her mistake. She threw her hands over her butt, covering next to nothing. She took off running to the bathroom, causing her butt to shake more violently for the laughing group.