I was entering my second year of college and my sister was entering her first. It so happened that she decided to go to the same college as me. Since we both were attending the same college my parents elected to find an apartment close to school that both of us could share in order to keep the expenses down. Shelli and I were both close so I didn't mind. It was better than being in the dorm any day. It had it's advantages to.
Ever since I can remember I have been sexually attracted to my sister. She was always a great-looking girl with a body that drove me crazy. I went to bed many a night jacking off to thoughts of her. This past year though, she developed into a woman. Her breasts and ass filled out nicely. Knowing that I would be sharing a small apartment with her made me hornier than ever. I looked for any opportunity I could to be home and around her. Wednesday evening Shelli had been studying and was feeling pretty stressed and asked me to rub her shoulders. It was rather warm in the apartment that evening and I was in athletic shorts while Shelli was wearing a thin t-shirt and panties. We were sitting on the couch so I positioned her between my legs and started massaging her neck.
I could tell that Shelli was enjoying this because she started to really relax and lean back into me. My cock started getting extremely hard from feeling her against my body. I was afraid that she would notice and pull away from me. But the opposite happened. She moved back closer, moving her ass directly against my cock. I was feeling very excited by this time and decided to get a little brave with my massage. I started bringing my hands down her back and around to her sides. There I would brush up against her tits. She seemed to be liking that because I noticed her breathing was getting as excited as mine. My hands rested against her breasts and started feeling the weight of them. Her nipples were now very excited as my hands cupped and rubbed her breasts. She then took her hands and placed them over my hands squeezing my hands harder onto her breasts. I took this cue and started passionately kissing her neck. She was getting extremely turned on.