Michael decided he would experiment on his sister before doing anything to himself. He thought since he wanted to be 18 so he was fished with high school, he would try it on Rebecca first. He set her age to 18 and waited to see if anything happened.
Soon after, he heard his mother call out to Rachel that she was ready to go to the mall to get clothes for college. Michael was excited that it really worked, until his sister came running down the stairs. She had a beautiful mature face that looked 18, but the rest of her was exactly the same.
She then started telling her mother that she didn't want to go because she was embarrassed that she still looked like an 8 year old. She said at least if I had boobs or was taller I could have a better chance of fitting in. Michael noticed that her voice still sounded like a child and tried not to laugh.
Michael then decided to: