My younger sister had always been prudish. Even by the time she reached 18 she had never had a boyfriend, never drank, never smoked, never did anything fun. All she would do is walk around in her prissy clothes and look down upon everyone as if they were below her.
Jasmine was what I thought to be pretty average looking. She always wore jeans that were loose enough to not anything off, but not loose enough to be called baggy and always wore conservative shirts never exposing anything at all to anyone. All in all I thought there was nothing special about her at all. Until the day I accidentally walked in on her as she was getting changed.
There before me stood my sister in nothing but a white, lacy bra and panty set. I stood there dumbfounded as I saw for the first time her long smooth legs running high up to her small waist, I could see her ass was extremely tight hidden beneath her panties. Her stomach was as flat as any other I have seen before which made her full round breasts seem even more perfect. I later found out they are 14C's. Her tanned skin looked great against the white of her underwear. I stood their dumbfounded taking it all in, my perfect vision was interrupted by a shrill high voice.
"What the hell are you doing, get out you pervert!" she yelled. I snapped out of my trance and ran out of the room into the hallway slamming the door shut behind me. I stood there trying to settle my mind as those beautiful images of my bitch of a sister ran through my mind over and over. Suddenly she came out of the room again and turned to me with the death stare she gives most people, that look turned into surprise and then disgust as she stormed away, then I realised that what I had just seen had given me the hardest erection I have ever had.
From that day on I was obsessed with her, going through her room when I was alone in the house looking for anything at all, looking through her underwear, holding them as I whacked off. My favourite was still those matching white lacy bra and panties that I saw her in.
One day when she had left for work, I waited for about 5 minutes then ran into her room, looking around on the floor I saw those white panties that I love so much. She had worn them the day before and I could still smell her sweet scent on them. I got hard instantly. I dropped my pants and started stoking myself, the panties held to my nose as I thought of getting my hands on that tight ass I longed to hold. As I got closer and closer to cumming I brought down the panties and wrapped them around my cock. The cool material sliding up and down my shaft, the image of my sister's pussy in that same material drove over the edge, I felt my balls begin to tighten as they started filling with my cum ready to shoot.