Jen held the hand of Halley, the seven-year old she was baby-sitting, as they walked toward the entrance of the video arcade. Jen was all out of tokens, except for the two she promised Halley she would save to buy balloons, and it was time to go home.
It was a Saturday night and Jen was spending it the way she spent every other night during the weekends; baby-sitting the neighbors' daughter. She had never had a boyfriend, and she pretty much knew why. She didn't have what all the boys her age wanted: breasts and a cute, round butt. Even though she knew not all girls started developing by the time they turned 16, she figured she had been singled out. Her body had all the curves of a two by four. As she and Halley walked through the arcade, she watched the other girls her age, the ones who had started developing, and sighed, wishing her body looked like theirs.
As soon as Halley saw the balloon vending machine, she let go of Jen's hand and raced over to it. Jen walked quickly after her. She didn't notice a piece of paper laying on the floor, since Halley was standing on it.
"I wanna red one please can you buy me a red one Jen?" she rambled excitedly.
Jen smiled. When she forgot about the fact that she was spending her wonder years baby-sitting instead of making out with all the cute guys, she truly enjoyed watching Halley. She was a cute little kid, and very well behaved. After baby-sitting some of the other neighbors' kids, who were absolute brats, she decided she would only watch Halley. Her parents paid the best, anyway.
"You can't pick what color you get," Jen reminded Halley as she handed the last two tokens to Halley. "But let's hope we get a red one." Halley put one of the tokens in the slot, and they watched as one of the balloons was moved over to the helium nozzle. The mouth of the balloon was stretched over the nozzle, and there was a hissing as the helium began to flow. Jen's eyebrows furrowed in puzzlement as she watched the balloon remain uninflated.
Then she felt the fabric of her t-shirt moving across her breasts. Or, the area where her breasts would have been, if she had any. When she looked down to investigate, she was shocked to see that she did have breasts! Not only that, but they were getting bigger! They were a full C-cup when she first looked down, and as she watched, they moved through the DD, and grew bigger still. Her t-shirt grew tight around her chest as her breasts continued to grow, and Jen was for once thankful that her once nonexistent breasts made a bra unnecessary. Jen was surprised to find that, as big as they were getting, they weren't heavy. In fact, they felt very light. Almost as if they were... balloons?? Oh my god, Jen thought. Is that why the balloon isn't being inflated? Because the helium is going into her breasts? That couldn't possibly be. Or could it? What other explanation was there? As she pondered her situation, Jen's breasts continued to grow, or rather, inflate. By the time they had stopped, they were as big as volleyballs. Her t-shirt had been stretched so tight that her nipples and aureolae were faintly visible through the white fabric. Her aureolae had puffed up to the size of silver dollars, and were half an inch thick. Her nipples were the size of thimbles, and poked prominently against the fabric of her t-shirt. Jen looked at her breasts, dumbstruck.
Lost in her amazement, she barely heard Halley lamenting the fact that the balloon hadn't been inflated. "Oh man," she declared. "I hope it works this time." And she put the last token in the slot.
Jen gasped as Halley's words registered in her mind, and as the machine once more fed a balloon toward the helium nozzle. She hoped Halley was right, that the machine would work this time. She doubted her t-shirt could stretch anymore without ripping.
The hissing began once again, and, Jen panicked as the balloon remained uninflated. She looked down at her breasts, expecting to see them bust out of her t-shirt. But they didn't. She thought they were at first, until she realized that it was only her nervous breaths, which were causing her chest to rise and fall heavily, that was making her breasts appear to be growing once again. This confused Jen. Where was the helium going, if it wasn't going into her breasts? Jen received her answer when she felt the fabric of her leggings moving against her butt.
Stunned, she turned to look at her behind. Sure enough, her cheeks were growing, or, as Jen assumed at this point, inflating. Jen watched as they continued to inflate, stretching the Lycra material. They were stretching the cotton of her panties plenty tight as well, causing Jen a bit of discomfort. The waistband of her leggings was beginning to be pulled away from her waist by the growth of her behind, so she pulled it higher up on her waist, lest anyone get a free look.
This had the effect of pulling the back of her panties in between her cheeks like a thong. Jen was glad, since it alleviated some of the tightness. When her rear finally stopped growing, her cheeks stuck out as far from her waist as her breasts did from her chest, and were as proportionately big all around.
"Oh man," Halley repeated. Jen didn't even hear her this time. She had discovered that she could see her reflection in the glass wall separating the restaurant area from the rest of the arcade, and was looking herself over. At first, she was near tears at what had happened to her body. But the more she looked at herself, the more she began to like what she was seeing. I did always want big breasts and a cute, round butt, she thought. And now I've got them. Her breasts were quite a bit bigger than she had wanted them to be, as was her behind, but they were both perfectly shaped, and amazingly sexy. And they certainly attracted the attention of the boys, she noticed, as she realized that she wasn't the only one checking her body out. All the guys sitting in the restaurant were staring through the window at her, mouths open in amazement. Their girlfriends, after seeing what their boyfriends were staring at, sat in disgusted silence, arms folded angrily across their suddenly inadequate chests. A huge smile spread across Jen's face as she turned to look at Halley, who was trying to get her attention.
"I know why it didn't work," she told Jen. She held up the piece of paper she had been standing on. "See?" On the paper, written in black magic marker, were the words: OUT OF ORDER.
Jen mussed Halley's hair. "I'm sorry you didn't get a balloon, Halley. Maybe next time we come it'll be working."
Halley frowned, disappointed. "Yeah."
Jen took Halley's hand and they walked out of the arcade, Jen's breasts and butt bouncing slightly inside the tight confines of her t-shirt and leggings.