The computer finished its countdown, and immediately a faint hissing came from somewhere outside the room. Though Amanda couldn't tell exactly where it was coming from, answering that question was one of her lowest priorities. She had no time to ponder it anyway, as suddenly she felt a cold gas flow out of the tube and pool in her mouth. Her eyes went wide with fear.
"Helium dispensing at nominal rate," came the computer's voice once more. "Test HE-01 for experiment "OSFA" proceeding accordingly."
"Test HE-01? Experiment OSFA?" Amanda thought to herself. "What the hell is this experiment? Am I some kind of guineia pig?"
Indeed she was, unwilling or otherwise. The cool gas from the tube was flowing steadily into her mouth and down her throat. As she lay on the table, naked save for the lime green panties she wore, Amanda worried just what kind of consequences her decisions had given to her.
Amanda winced as a pressure began to build throughout her entire body, though mainly focused within her chubby belly. The slightly chubby protrusion suddenly began to inflate just like a balloon, growing rounder and firmer as its volume increased. Still bound firm, she could only watch in horror as it swelled before her very eyes.
The computer (or perhaps the voice behind the computer) had detected signs of confusion from Amanda earlier. Now that the experiment had commenced, the details could be revealed to her.
"Amanda," the computer began, "your assistance with this experiment is strictly voluntary. You agreed to participate when you decided to wear the underwear we sent you. Know that you'll be providing a great service to women around the globe."
Amanda had no idea what the computer was talking about. The mysterious package of panties she had gotten in the mail made no mention of experimentation or consent. Yet, there was nothing she could do as her belly continued to bloat, her naked breasts now starting to balloon as well.
The computer continued. "This first test is quite simple. We'll be testing the elasticity and tensile strength of your underwear in an effort to create a true "One Size Fits All" product. In order to achieve these results, we will be testing its functionality on various sizes and volumes. We are currently in the process of administering 25 cubic feet of helium."
Helium! Amanda finally figured out what the gas in the tube was. She bemoaned her choice, but was helpless as her stomach now towered nearly a foot above her. Her breasts, though blessed with natural D cups, were now much closer to large melons. Every time she picked her head up to observe the changes happening to her body, she felt her chin press into her massive tits.
Unfazed by what was going on, the computer droned on. "It was necessary to procure human subjects to test our product because we required data for some rather "abstract" values, such as comfort and tightness. Again, thank you so much for volunteering today!"
The table Amanda was resting on suddenly released the restraints around her arm. Instantly, her hands shot to her belly to verify if what she was seeing was actually real. The reverberating thump that sounded as her hands slapped the surface confirmed it. She ran her hands all over. Not only did it feel like a balloon, it really was.
She left her hands there as her belly continued to blow up, now well more than two feet above her. She had gone far beyond the realm of looking pregnant. Her breasts had swollen tremendously as well, each nearly a foot wide themselves.
Though terrifying, it was surreal just watching the orbs of her body slowly swell and balloon. Even without her arms restrained, Amanda knew it would be futile to try and pull out the hose with that apparatus still swollen in her mouth. All she could do was watch and feel as she turned into some kind of parade float.
Suddenly, the flow of helium ceased, that last of the gas pumped into Amanda. The apparatus on the hose deflated and she was able to spit the tube out of her mouth. Now able to speak clearly, Amanda's first word was "Shit..."
The computer's voice returned. "Dispensing complete. Verified 25 cubic feet of helium administered. Would the subject be willing to answer a few questions?"
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