Sarah decided to take her chances. She thought of it more like some divine being granting her wish, instead of some malevolent force trying to destroy her. Besides, what teenage girl isn't self conscious in her own body to be willing to try something like this. "Fine, I will try it. And if it works, I promise you can play with my boobs." Jim knew Sarah was joking, and knew Sarah wasn't the kind of girl that would just let any guy do whatever they want. But Jim always blushed when Sarah said things like that.
"Er..." Jim said, trying to fight back his awkwardness. Sarah laughed, and Jim rolled his eyes and smirked. "Okay, whatever, just come to my place after school, and we'll try it out." Jim paused, and then whispered. "This doesn't effect clothes...so you might wanna bring some baggy stuff that you can wear after, and if...you uh...grow."
Sarah nodded. The rest of the day felt like an eternity. This wasn't helped by the fact that she ran into Vanessa more than usual, and had their normal conflicts. Vanessa called her fat, and Sarah pointed out the tiny bit of fat that had appeared recently. Vanessa acted unphased, but it actually was a deep wound. Still, this just made Sarah more sure that she wanted to get bigger.
Eventually, school ended, and Sarah literally sprinted to car to get to Jim's place, and saw him in his garage. He already set up a system that would slowly drip the chemical onto Sarah's skin, so he could see how much of an impact it would have on her size. "Ready to start?" Jim asked. Sarah was wearing a T-shirt, and shorts.
Sarah paused, then nodded. "Wait! How big did your sister grow?"
"Well, she got about an ounce of this stuff on her, and she looks about an inch taller, and put on a bit more curves, but I didn't really want to compare before and after on that." He explained about how his 15 year old sister was affected. "If this effects all girls the same, the same should happen to you. We'll start with just 1 ounce, ok?"
"Okay...I'm just a bit nervous." Sarah said, her heart beating.
Jim set up the tubing over Sarah's arm, and had her stand along his garage wall, which he had marked with height markers like they have at stores to see the height of those who try to steal, so he could see how much growth could be caused by this. "Okay, I'm gonna put 1 ounce. It will fall onto your arm, and it will feel just like water, and absorb into your skin. I'm not sure what you will feel after, but my sister didn't seem like she felt anything. Okay, ready?"
"...Yeah..." Sarah said, and took a deep breath as the liquid fell on her arm.