One day I was sitting in class daydreaming about my sister who was in the same class. She has perky breasts and long, slender legs. I had been dreaming about my sister, Jenna, since she hit puberty and started developing. Now she was 18 and dressing in tighter, smaller clothing, just asking to be looked at.
All of a sudden, I was being snapped back to reality by our teacher, Ms. Nelson. She was semi-attractive being 35. She had big 28C breasts and the round ass of a black chick. She asked me the solution to the math problem on the board. I glanced at it and said, "I have no idea, Ms. Nelson." which was my honest answer. She told me that my grades were slipping and that I needed to see her at the end of the day, causing a round of ohhhs from the class. As class was let go my sister came up and told me she that she would wait on me since I was her ride home. At the end of the day I walked back to Ms. Nelson's class and saw my sister waiting outside. She stepped inside and I walked in behind her watching her ass move in her short skirt.
Ms. Nelson was wearing her usual dress and asked me to sit down in the desk closest to hers. I was surprised to see her desk kindof cleaned off since it was usually really messy. I sat down and expected her to start yelling at me for my grades which really weren't that bad. I was really surprised when she asked my sister to sit on her desk. My sister went and didn't look shocked. once she was there Ms. Nelson started rubbing Jenna's breasts through her shirt. My sister just tilted her head back and relaxed as I could feel my cock springing to life. Ms. Nelson then slipped of Jenna's shirt and bra, exposing her small, perky breasts.