Jeff was a serious disappointment as a brother. She'd probably become a cheerleader out of a craving for stronger men in her life.
But he was her brother, and if she could make him better for real, she would do it. It might be fun to see if the computer would show her how that would look like.
She selected Jeff, and an accurate image of him displayed, on a tab that said 'physical attributes'. The other tabs said things like 'mental attributes', 'sexual attributes' and 'social attributes'. At the far right was a tab that said, 'advanced options'.
The game turned out to be easy to use. She could change his weight, his fitness and stuff. The game would sometimes say it had to adjust things on the other tabs to allow the change she asked for. She had him looking pretty good in a few minutes, although his clothing was in the way.
It took a little searching, but she found how to hide his clothing. The first thing she decided upon looking at his nude body was, that cock would never do. The program wanted her to type in numbers for length and girth, and she giggled. She knew what to give him. She got up, found her favorite dildo and a measuring tape, and worked it out. Ten inches of thick manhood now stood out from him when she selected "erect".
Flipping through the other tabs, she was cool with what she saw, except under social attributes, the dork was still a virgin! She decided to fix that, and just because she was thinking about messing with the girl anyway, she picked Melody to be his active sexual partner.
Apparently she could watch a demonstration of her choices, but when she asked for it, a pop-up asked her if she wanted to apply all changes, first.
She shrugged and clicked OK, and felt something like a slight electric shock. Then she saw the 'demonstration' on the screen. It was a porno of her brother and her friend Melody!
Then she realized she could hear similar noises coming from down the hall! She tiptoed down to her brother's room and peeked, to see the same scene as on the computer, and her brother with all his changes!
Sneaking back to the computer, unable to believe what she had just saw, she decides to make more changes and confirm that they really happened.