Let me tell you the story of my sister Shannon and how she started letting me jerk of to her this summer.
My name is Chris and I'm attracted to my older sister Shannon. I've jacked off thinking about her huge tits hundreds of times. Every once in a while I feel weird about fantasizing about my sister, but the awkward feeling usually doesn't last long.
I'm 18 and just graduated high school. I've been accepted into a local college and will stay living at home while I attend in order to save money. I'm a fairly average student who likes sports but is also a bit of a geek, enjoying video games and Magic the Gathering. I wouldn't say I'm good looking but I'm not ugly and am in pretty good shape. I have a good sized cock; no porn star material, but about 6" long when hard and pretty thick, though I haven't had a lot of sexual opportunities.
Shannon is 19 and just finished her first year away at college. She was only home for a few days at Christmas and it's been a long year not being able to ogle her boobs. She's been back for about four weeks now and it's like my cock is constantly hard. I've pretty much rubbed one out thinking about her every night since she's been home.
Shannon is about 5'6, with amazing curves, smooth skin, gorgeous blue eyes, and huge titties. She has shoulder-length dirty blonde hair, and is a little chubby. She's definitely no super model that's for sure, but she is very cute and there's something about the way she carries herself - shy but confident - that drives me bananas. She almost always wears cleavage-revealing shirts, and frequently goes braless around the house.
It had been so long since I had seen her, that I wasn't quite as sneaky as I used to be for the first few weeks she was home, in my urgency to take in that body again, and I was sure she caught me looking down her top and staring at her in her bathing suit or bath robe. She didn't let on that she saw me looking though. However I did notice that she seemed to be exposing more and more skin, especially when mom and dad weren't around; I have no idea how her grades were, but college seemed to have made her even more confident about her body.
So, how did this start to get more serious? My dad had a convention to go to for work early in July, and my mom went with him. That left me and Shannon alone in the house for five days. I was working at a grocery store as a stocker for the summer. Shannon worked part-time at the library. We were both usually at our jobs for most of the day, but home in the afternoons or evenings. That first night was a Tuesday; I worked until close, and Shannon stayed out late with friends so we didn't see much of each other.
Wednesday was a crazy hot and humid day. I had a morning shift and Shannon had the day off. I returned home from work just after 2:00 PM, and after grabbing a cola from the fridge, I spotted Shannon through our patio door. She was in the backyard lying on a chaise longue, wearing a bathing suit. It was a red one-piece, and was fairly modest, but even the most modest bathing suits couldn't hide her curvy ass or big juggs. I almost choked on my drink as I stared out at her, my hand instinctively going to my crotch to rub my hardening cock over my pants. It looked like she had just finished swimming as her hair was wet and her skin glistened. She was between the patio door and the pool, barely fifteen feet away.
I couldn't help myself and unzipped my fly, pulling my half-hard cock out to stroke it while I looked at her. I didn't get chances like this when mom and dad were around and didn't want to waste the opportunity. I stood at the end of the counter by the patio door and lightly slid my hand up and down my shaft, going rock hard within seconds as I stared at my busty sister. A couple of times I would move right out so I was standing in front of the glass door; if she were to look up, she'd see me stroking my hard cock while watching her. She did turn slightly and I jumped back, heart pounding, but she was only adjusting her position slightly and did not look towards the door.
I noticed her shirt and shorts on the table beside her and had an idea. This was a great time to have a snoop around her room. I had touched her panties briefly once before in the laundry room, but had never really had a good opportunity to look through her stuff before.
I tucked my boner back into my pants, quickly left the kitchen and skipped up the stairs. First I went into my room and changed into my bathing trunks; "just going for a swim sis!" I could say if she wondered why I was only wearing a bathing suit around the house. Then I went across the hall to her room.
The window in her room overlooked the backyard so I first took a peek outside; she was still lying in the chair. I rubbed my cock over my trunks a little as I watched her again for a bit. Then I turned my attention to her room.
She wasn't particularly organized, but her room wasn't too messy. There were clothes all over the place though. I very quickly spotted a bra on her bed. It was purple with a very sturdy underwire with four hooks at the back of the straps. I picked it up and looked at the label. 36G! Holy fuck she had huge tits! I brought the bra to my face and inhaled, but it just smelled like laundry detergent; she obviously hadn't worn this yet since it was washed.
I looked to the corner of her room and saw her laundry hamper. It was overflowing and clothes spilled a little into the floor. I took a peek out the window; she hadn't moved. I went to the hamper and started looking through it. I didn't worry too much about leaving it exactly as I found it since I guessed she didn't keep track of what her dirty laundry pile looked like. I found another bra; all black and lacy on the cups; damn, I'd be able to see her nipples through the lace if I ever caught her wearing this. I held it to my face and could smell her scent. I don't know what lotion or perfume she used but after smelling that bra, it was a smell that I would always associate with my sister's big tits.
I pulled my bathing suit down at the waist, letting my hard cock pop out and I rubbed my cock in the cups of that bra. Then I decided to do the same with the clean bra on the bed. Doing it on the used one was hot, but the thought of her putting this bra on after I had rubbed my cock on it was even hotter. I imagined her nipples pressing against the material of the cups right where my cock had been. A little precum leaked out and I rubbed it in, leaving just a slight damp stain where her big tits would be pressing against the material. Oh god, my precum would be rubbing into her nipples!
My heart was pounding very hard in my chest as I perved on her bras. I replaced the clean bra on her bed and went back to the hamper. Still half tucked into some jean shorts I found a pair of her panties. I pulled them out and brought them to my face and I could smell her pussy! God that drove me crazy. I licked the inside of the panties, tasting the hint of her juices and then moved to the window.
