Whatever he wants

John took the slate to his room. He looked down at it and thought about what to try it out on. There was a knock on the door. "Hey, dumbass, mom wants you to take out trash and pick up the dog shit in the backyard."

John seethed. "Why can't your fat ass do it?"

"Don't call me 'fat ass,' loser!"

John heard Olive walk off and her bedroom door slam.

John tapped the slate. "I wish I knew Olive's measurements. Suddenly he knew his sister was 5'6, 121 pounds, with a 34-32-35 body. He smiled evilly. He used the slate again. "Olive's measurements are 34-32-42 with a corresponding increase in weight."

John needed to see if the device worked, and he had another plan. "I have a hidden camera in Olive's room that streams to my phone." He picked up his phone and saw the app for the camera. "Fuckin' A!" He opened the app. Olive was lying on her stomach on her bed, texting on her phone, and sure enough her ass was huge. "Damn! I've hit the universal jackpot!"

John tapped the gem again. "Olive will feel compelled to do all of her brother's chores right now; in fact, she must do all of the family's chores even though she hates it."

John watched the video feed. Olive slammed her phone on the pillow and got off her bed. John left his phone and slate in his room and met Olive in the hall. "Where are you going?"

"Like it's any of your business, but I have to do my chores. God, why can't you have any?!"

John watched her fat ass walk off down the hall towards the kitchen then he went back to his room. He thought about what to do next with the slate: improve himself, use it on Olive's friend Kayley, who was just as bitchy as Olive but incredibly hot, take the slate for a walk and have some fun in the neighborhood, or fuck with Olive some more?