Author's Note: All characters are at least 18 years old. Thanks for reading, and please send feedback!
CHAPTER 01:
All my life, my little sister, Sarah, was a pain in my ass. It was just the two of us, and she was the one who was always spoiled, just because she was a girl. Whenever we would get in a fight, my parents would always take her side. They always thought that their "precious little Sarah" was innocent, and I always got in trouble. Even though she succeeded in constantly frustrating me, I still always put up with her because deep down, I really liked hanging out with her.
Years later, when I was in college and she was in high school, I finally noticed her attitude had started to change. At 19, I was a confident, well-built, and smart kid. I had a good group of friends, and Sarah began to look up to me as a protective brother. She, on the other hand, was 18 and had developed into a stunning young woman. By running cross country and track, she kept her body fit. She maintained a healthy weight though and most guys couldn't keep their eyes off of her. Her long, dirty-blonde hair, entertaining personality, and C-cup breasts probably helped her in that department. Over time, I slowly began to realize that my feelings were changing from brotherly protection to my own sexual lust.
I don't know whether Sarah knew that she was turning me on or if it was just plain ignorance. Realistically though, I don't know how she could have ever thought I wouldn't get turned on. It was summertime, and because we live near the beach, this meant that Sarah was almost always in a bikini. She would be out with her friends most of the time, but whenever I saw her around the house, I couldn't help but get excited when I saw her beautiful orbs spilling out of her top.
One lazy day, I woke up around 11 A.M., and went upstairs for breakfast (my bedroom was in the basement). As usual, the house was empty, because my parents were off at work, and Sarah was probably at the beach. After making myself some breakfast, I retreated back to my bedroom. Because I had some time alone, I decided I might as well masturbate. After watching some videos online, I was getting close to cumming. However, thoughts of fucking Sarah kept popping into my mind. I got a crazy idea when I decided that jerking off to her would be much more satisfying if I did it with her underwear. I didn't know what kind she wore, but I could just picture her beautiful round ass all around a black satin thong, and her big, round tits squished together in a matching black lace bra.
On my way upstairs, I kept stroking myself. It always gave me a sense of excitement jerking off in the main part of my house where anyone could walk in at anytime and see me. I also had large sliding windows in the front through which people would be able to see me jerking off if they happened to glance over.
As I started to ascend the second staircase up to the top floor of my house, where Sarah's bedroom was, I began to hear a quiet whimpering above me. I immediately stuffed my cock back into my shorts, in actual fear that someone was upstairs and would see me stroking myself. I slowly crept up to the top of the stairs, and I noticed that Sarah's bedroom door was slightly ajar. I crept closer, and I couldn't believe what I saw. She was definitely moaning, but she was laying face down, so her voice was muffled by the pillow. Her gorgeous ass was up in the air, and her hand was a blur on her clit. I could just see the sides of her C-cups squished onto the bed underneath her.
I was stuck. I didn't want to leave, because this was one sight I had been dreaming about for months. On the other hand, I didn't want to walk in, in fear that she would become upset. As I kept listening, I heard her moaning. "Oh God. Oh God. Just like that Kev. Oh my God."
My heart began to suddenly beat in my chest much harder. My incredibly sexy younger sister had just said my name when masturbating. It couldn't have been a mistake and, I knew that I had to do something.
After rearranging myself so my cock wasn't tenting my shorts anymore, I knocked twice on her door, and it slowly opened with the knock. Sarah immediately stopped and locked up at me with terror in her eyes. I had caught her masturbating to me, and she was instantly incredibly embarrassed. For a few seconds neither of us spoke, and I took this time to finally admire her voluptuous boobs and quickly glance at her neatly trimmed patch of pubic hair.
Finally, "Kev what are you doing in here! I thought you were still sleeping! Get out of here now!"
"Wait a second," I said, trying to explain the situation. "It's alright, I..."
"No! No it's not! Leave!" shouted my still completely naked sister, obviously very embarrassed at the predicament she was in.
I didn't realize she was going to be this upset, so I backed up and left her alone, with an apologetic look on my face. She just stared at me with a look of anger and fear. After deciding she needed her space for a little while, I went back down to my bedroom and flipped on the T.V.
About twenty minutes later, there was a knocking on my bedroom door. Sarah had the courtesy of waiting until I said "enter" before walking into my room. She had put on a tight red halter top and a jean skirt. She still looked sexier than ever.
Again, we both looked at each other for a few seconds before speaking. Then at the same time I said, "Sarah listen" and she said, "Kev please."
I just laughed and said, "Alright, you go ahead."
With a sad look, Sarah said, "Kev I am really sorry you had to walk in on that. I honestly didn't expect you to be up for another half hour at least, and I wouldn't have done it if I knew you were awake. I'm really really sorry Kev. Just please don't tell Mom and Dad though. I don't even know how pissed they'd be if they knew I was...you know..."
"Masturbating?" I replied with another laugh.
"Yeah I guess so," she replied, looking sadder than ever.
I couldn't stand letting her be this sad, so I told her, "Listen Sarah it's not a big deal. Plenty of people masturbate. It's just a normal human feeling to want to have an orgasm. Alright listen, before I went upstairs today, I was actually jerking off myself. I just thought that...I don't know...maybe it might be better to do it with...something more exciting like...."
"Like what?"
Now it was my turn to be embarrassed. "Alright don't get mad, but I just thought it might be better to jerk off with your underwear." I finished quickly, before I lost the nerve to actually tell her.
Sarah came over and sat down on my bed, looking confused for a minute. "Wait seriously? You would want to jerk off in my panties?"
"Well yeah I guess so. It's just that you're so hot these days, and I mean obviously your panties had already touched your pussy, so I just thought it would be pretty exciting."
"Wow Kev. I never thought that you would've wanted to..."
"Okay Sarah I'm sorry. I didn't mean to upset you more, I was just trying to explain that it's ok to masturbate."
