The pressure of the book in my lap intensified my cock’s twitch. It was rock hard now. I started fumbling with words here and there. She tried her b...st to understand. She was a sweet student. Suddenly she said “Let me do this sum.. I think I should be able to do it” Saying that, she pulled the book out of my lap. My cock did a quick jiggle and shamelessly stood up to make a tent. She pretended as if she didn’t look at it. I am moderately endowed. I’m close to 7 inches when horny. I don’t. We got along like most siblings, playing together when the mood dictated and staying out of each other’s way when need be.Things started to change around the time she turned eighteen, though. Most of the guys in my school had no problem telling me how hot my stepsister was, which I’d tried to avoid thinking about, despite the fact I had noticed the great changes to her body over the years. Val always had bright hazel eyes and perfect brown skin, but after she became an adult, it was hard not. But in Felicia's case, the way her large boobs just rocketed away from her rib cage was dizzying. We aren't talking about the average high school girl's boobs here. They were full and round and just incredible. Her boobs belonged on a thirty year old woman. Her waist narrowed and then veered outwards creating that hourglass shape that never, ever goes out of style.Her shorts were modest, but the legs that extended from them were incredible. Every detail of her body was feminine perfection. Even. During dinner he would respond to people talking to him, but he was reserved. He told me he was trying to put it all together to figure out what my father's plan was. I continued to argue there didn't seem to be a plan.I found out, because he told me, he had been spending time talking with Sabrina. He said she was a friendly person and pleasant to talk with. She was also asking his advice about what she should do when she graduated. She asked questions about various professions and what kind of.