Oh, it wasn't a milkshake. But the tube in her mouth sure felt like a straw, so she assumed it was. Her eyes still closed, She began to suck through the tube, trying to make the milkshake come to her mouth, and though she tried hard, no liquid ever reached her lips. "Jeez Louise Carla! You make a damn thick milkshake! Did you even add any milk?!"
"Right... milkshake..." Carla mumbled as she smiled mischievously.
"What did you say?" replied Mel.
"Oh... nothing. You've almost got it up through the straw. Keep trying!"
So Mel, once again, began to suck away on the tube, inhaling so hard it was creating a vacuum that sealed her lips to the tube. Unbeknown to Mel, of course, was that Carla was inching her hand towards a large metallic cylinder that she had taken into the room with her as she had Mel close her eyes. If one were to follow the "straw" that Mel was sucking on so hard, one would find that it led to the aforementioned cylinder next to Carla. Slowly as she watched Mel suck on the tube, her hand began to turn the wheel on top of the nozzle, opening it about halfway.
As Mel began inhaling once again, recreating the vacuum seal around the tube, the released air from the tank had traveled the length of the tube and had reached Mel's mouth. Instantaneously, she felt a small stream of air travel through her mouth and down her throat. "That's not right..." she thought to herself. Something seemed fishy about her milkshake. As she made her realizations, she could feel the steady stream of air getting faster. Enough rationalizing! She needed to know what was happening!
Quickly she opened her eyes, and first saw Carla sitting opposite of her. She followed Carla's hand to the metal cylinder and watched as she turned the valve all the way open. Then she followed the hose from the tank up to... her mouth! She was sucking on a tube attached to a helium cylinder! "What the hell are you doing Carla? What's your problem? Are you crazy!?"
While that's what Mel wanted to say, she only mumbled incoherent words that came out as "mmm's." She felt the air stream growing steadily faster still as she tried to pull the tube from her mouth, but to no avail. The vacuum she had created from sucking on the tube was maintained when the air began to rush through the hose into her body.
There was no way she was going to break the seal unless the air stopped coming through the tube. As she rose to go for the tank, she noticed something different. As she looked down to see what sensation had stopped her, she just stared at the sight before her. Her once flat stomach began to pooch out with the incoming helium! By the second, she could watch it increase inch after inch. Placing her hands upon her stomach, as if hoping to slow or stop it's growth, she could feel her hands slowly separating as it retained more and more helium. "No no no... this isn't right..." she thought to herself.
Her troubles were just beginning as not only was her stomach growing, but her breasts as well. The former A cup was obviously no longer so, as she watched the globes grow in the same manner as her stomach. As they grew, the neckline of her pink shirt began to tear and drop lower and lower, revealing more cleavage than she had ever had in her life. Taking a hand from her stomach she placed it across her chest, again trying to push back the inevitable. "This is bad!" she thought as she looked first at her growing body, then to Carla, noticing her smiling so coyly...
The same feeling in her stomach and breasts... it wasn't over. Her ass had now began to feel the pressure from the helium as it too began to expand, pushing against her blue jeans, adding to the already uncomfortable situation. "This is worse!" She knew things were getting bad as the steady stream of helium kept forcing its way into her body. Tears began to form on the seams and seat of her jeans, her tan thighs poking through, looking for an exit. "Thank goodness I decided not to wear a belt today!" Her ass, growing just as fast as the rest of her, began to win its fight against the jeans, as the tears grew larger, and the button on front tighter... PING!
As if a magic button was pressed, her shirt and jeans tore at the exact moment the button burst of her pants. No longer restrained, her now massive breasts surged forward briefly and wiggled just as jello would, but only for a moment as they settled down on her titanic stomach. Her ass now free from her jeans revealed itself in all its panty clad glory. Mel had on a pair of black cotton panties, with tiny frills on the elastic at the top. Stretched quite well, the "Fruit of the Loom" lettering began to separate itself further and further as her ass tested the limits of her now fully revealed underwear. "This just isn't happening..."
Carla had been watching the show with sadistic glee, smiling mischievously as she saw her friend turn into a human balloon. First her stomach, then her boobs, and then her ass! As Carla watched, her grip tightened on the valve of the tank. As she locked eyes with Mel, Carla knew that Mel didn't understand and had no idea why she was doing this. Carla walked over to Mel's growing figure, and while gently stroking a finger of her stomach, began to explain.
"You have no idea do you Mel?" Carla asked her. "You're so caught up in the moment, you're not even relaxing. The whole reason I came over was to help you feel better, help you to relax. Inflating your body isn't bad at all! It's a release! If you would stop worrying for a moment, you would realize how GREAT you must feel! I can tell you from experience! I do this all the time!
Knowing that Mel was nearly immobile, Carla turned off the tank, relieving the gaseous onslaught into Mel's mouth, thus releasing the vacuum. As the hose fell out of Mel's mouth, she remained speechless for a moment, taking in not only her current situation, but the words Carla had just spoken to her. She was a huge, inflated balloon girl. Her stomach stuck out more than three feet in front of her, almost perfectly spherical, as if she swallowed a beach ball whole. Due to the size of her stomach, her now grapefruit sized boobs were pushed up to her face, almost making it impossible to talk. Her ass, as well, looked as if she had stuffed a couple of basketballs into her black panties. A flood of emotions invaded her conscience; fear, anger, rage, and... arousal. As much as she may try to convince herself otherwise, there was a part of her that actually liked this feeling. So she smiled.
Carla noticed her friend's smile, and was elated! "I knew this would cheer you up! You're having so much fun! I think now I should..."