Rachel was an average red headed girl of 11. Her older sister Stacy on the other had was a 16 year old blond bombshell, she had large breasts and it was clear that given a few more years she would easily be able to become a model. Stacy always teased Rachel, it wasn't a mean spirited sort of way more of a sibling thing, but Rachel took it far too seriously most of the time. This naturaly led her to being very jealous of her older sister, her beauty, her popularity, and especially the fact that she was the older sister. As things go she knew there was no way to change this and she would just have to live with it, but then one day she saw the news story on a recent rash of regenerex related cases in her area. This gave her a dream, but as she was only 11 knew it would be almost impossible to get her hands on a vial. It was while she was watching the news story that her luck changed.
Her sister came in the door with what appeared to be a small but long box hidden behind her back, she greeted Rachel very hurriedly and attempted to get to her room without rousing too much suspicion, but Stacy was not very good at hiding things and Rachel had already seen that she was hiding something. Normally she would have thought nothing of it, but the way Stacy was acting made Rachel very curious. She listened as Stacy hurriedly shuffled some stuff in a drawer around, closed it, and came back out of her room dressed for a night out and headed out only stopping briefly to tell Rachel to let their mom know shed be back before 11 she was going out to hang out with some friends at the mall.
Rachel waited a few minutes to make sure her sister was gone, and went in to Stacy's room as she had many times before. She knew all her hiding spots, and quickly found the box that she ahd left in the drawer. She opened it to seer a small vial labeled RGX-32 which she knew from the news story she had recently heard was the codename for regenerex. She had no clue what her sister wanted with that, but she knew this was it her chance. She could be the older sister, she could get her sister back for all the teasing she had put her though, especially the most recent time when Stacy had embarrassed her in front of her friends at her last sleep over by coming in wearing one of Rachel's training bras and snapping it when she stretched to emphasize her large breasts (it broke on accident but Rachel didn't know that) Stacy had then felt the need (to cover her own embarrassment) to mention how small Rachel was.
Rachel went to her room and found an old chemistry set and filled a vile with water, she then swapped the RGX-32 with the water vial and hid it in her room to wait for her chance. It was at this moment the phone rang startling her a bit. It was her mom informing her that she would have to work through the night at her lab, and that she would most likely be gone through the weekend, and that if she needed it there was a few $20 bills in her room to order food. This was her chance, her and her sister would be alone, the perfect opportunity....