Cathy never did sleep with much on her bed; a single pillow, a thin blanket and her stuffed pink piggy was all she needed. She felt that anything more than that would be too confining and constricting.
She adopted this same minimalist view with her sleeping attire as well. With practiced ease, she undid the clasp of her bra, slid the straps from her shoulders and pulled the undergarment through the sleeve of her shirt, letting her ample orbs breathe and hang freely. "Oh my goodness, that feels good," she said, exhaling with a sigh of relief. Kicking off her flats, she undid her jeans next, letting them drop to the floor, exposing the pink cotton fabric that clad her rear. "These panties I got are just so darn comfortable," she commented, rubbing her hands across them gently.
After the quick distraction, she pulled her arms out of the sleeves of her shirt and pulled it over her head, tossing it into the nearby laundry basket she kept by the door. It was then that she noticed what her baggy shirt had been hiding. She was rather perturbed to see that her stomach was pushing out a fair bit. Cathy normally had a bit of a paunch already, which she begrudgingly accepted, but now her stomach was far more prominent than usual. From a stranger's perspective, it would have seemed that she stuffed herself more than generously at an all-you-can-eat buffet. "This bloating is ridiculous," she noted, before she was unable to stifle a yawn. "I'm so sleepy. I really hope my stomach feels better tomorrow."
Wearing nothing but her panties now, she flopped onto her bed, opting to sleep on top of her blanket. Resting on her back, with her stuffed pig pulled close to her, it didn't take long before Catherine fell into a deep slumber.
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Her panties had never ceased their devious task of inflating her, even while she slept. Not only were they trapping her every breath in her body, but the nano-machines in the cotton fabric were "absorbing" the air around them and injecting it into her as well. Throughout the day, her jeans had acted as a shield, impeding the panties from absorbing a substantial amount of air. Now fully exposed, the machines had a near infinitesimal payload in which they could, and would, use to blimp up their host.
As such, while Cathy slept, she began to expand at a far greater pace. Her prominent belly ballooned rapidly, pushing higher into the air on its way to the ceiling. The nano-machines, however, worked far more efficiently than to just deposit everything directly into Cathy's stomach; the gas was being distributed throughout her entire body. Her D cup melons blew past more and more letters in the alphabet. Her butt swelled tremendously, stretching her panties (to a point that any regular pair would have torn apart) as the fabric hugged her growing cheeks.
Cathy's growth went unabated throughout the night as her panties did their job.
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When the morning came, the first rays of the sun shone through her window and rested atop her face. Disturbed by the bright light, her mind was woken, though her eyes had yet to open.
She took a deep breath, remembering the dream she had last night. She had imagined herself in the sky, flying, with an innumerable amount of balloons all around her. It was a very "free" feeling, and she smiled as she mused on it. Slowly, she opened her eyes to find...