"Megaaaaaaaaaaaaan!" Laurens voice echoed from down below. Your younger sister awoke, pulling her groggy head up from her drool-soaked pillow. She glaced instinctively toward her clock; it read 8:54 in the morning.
"Geez, it's not even nine and she's already yelling at me..."
Megan slipped out of her pajaymas and into a pair of sweatpants and a t-shirt as well grabbed the bottle of fat powder and slipped it into her pocket. She headed downstairs, following the sound of chopped lettuce. She traced it to the kitchen, finding Lauren standing at the counter, chopping herself a salad. Hearing her sister's footsteps, Lauren spun around.
"I called for you five minutes ago, Meg," Lauren chided.
"I had to get dressed," she replied cooly. "Besides, what are you mad about already?"
Lauren rolled her eyes as if to say "you should know". In any case, she turned towards the refrigerator and pulled the door open. Meg was honestly shocked as she came to realize that it was nearly empty. The lunchmeat, the condiments, and the cookies were missing. Yesterday the thing had been full, now there was not enough to feed two people.
"I know you've always been thin and never have to worry about your body like me," Lauren began, "but this is disgusting. You emptied the fridge. Do you want to become a fatass? Do you want to have a heart attack?"
Meg was speechless. Not because of the accusation, but because of the fire behind. Lauren was a terrible liar. She must not have remembered the binging at all. The powder must have had some kind of memory altering effect. What's more, Meg hadn't noticed it at first, but it seemed Lauren did indeed game some weight. It wasn't much, but her breasts certainly seemed a tad bit larger. Not a full cup-size, by any means, but they certainly stretched the fabric of her tank-top more than they had a day before.
"Are you even listening?" Lauren asked, pulling Meg out of her mental funk.
"Uh, yeah, yeah, I got it. I'll try to binge less."
"Oh, and another thin- Kyaaaaaa!" Lauren shouted as her hands cupped her backside. "Geez, again? I've already went three times today. This high fiber diet is killing my colon."
"Or maybe its the fridge-sized meal you ate last night..." Meg thought to herself.
"Finishing chopping the salad. It's our breakfast!" Lauren moaned as she darted towards the bathroom.
Alone with the food, Meg was given another opportunity to sabotage her sister's meal. She pulled the bottle out. She didn't know what to do. The way she saw it, she had three options. The first was to continue as planned. Lauren had already started to gain, so keeping the current dosage would prove to be her undoing. Additionally, the memory loss opened up a lot of opportunities for messing with her sister without any threat of recourse.
The second was to quadruple the dosage. This was a riskier play and there wasn't any real reason to do it other than pure curiosity. There weren't any overdose warning labels on the bottle so theoretically it wouldn't have been problematic. Theoretically. Besides, the sight of Lauren's slightly bigger tits had ticked Megan off. The powder was supposed to ruin her figure, not make it better.
Finally, Meg had the crazy idea of spreading the power on all the food. As much as it pained her to admit, she was jealous of Lauren's curves. Mainly in the chest. Spreading the powder in her own food a bit might help her out in that department. Breasts are mainly fat, after all and she wasn't as afraid of being chubby as Lauren was.
Ultimately she...