I must have been about 16 (two years ago) when I first admitted to myself that I found my sister Jane attractive. She was 3 years older than me and up to that point I never really thought much about her other than as a big sister. It all hit me when she came home from college for the first time during her freshman year. While away, she had for the first time in her life really gotten into working out. She had always been slim but never really toned or muscular that I noticed. Whatever it was she did that first year away was really working, because she looked great. Jane is about 5'5" and I guess about 110 pounds. She has pretty green eyes, very dark brown hair, cut shorter at the time, but now about shoulder length. She has classic cheerleader-type looks that were now leaning more toward gymnast-type with the new workouts. Her butt was firm and round, and her breasts were as nice as I have ever seen ... about a 34C I guess... the perfect size for her athletic new body. When she walked in the door, it hit me hard, I almost couldn't speak. She even had pretty feet now that I looked at them while trying to avoid staring at anything obvious.
"Hey little brother" she said, "what are you staring at?"
"Nothing Jane, just haven't seen you in a while is all". I actually think she knew I was checking her out but she never said anything. The rest of that visit two years ago was pretty uneventful. It was mostly a matter of her hanging around the house in various workout and swimming outfits, generally driving me wild with lust without a clue she was doing so. Or did she? I alternately dreamed about having her soft tongue wrapped around my shaft, sucking her toes, licking her thighs, doing her every way imaginable from behind, biting her nipples, blowing a thick load on her neck and every other act that two people can do. Anyhow, after 3 weeks she headed back to school and because she was so far away and I was gone myself a fair amount because of a traveling summer-league baseball team that I played for, we didn’t see each other for another 2 years. I wrote off my obsession with her to hormones and moved on to a string of girlfriends, most of them athletic types with dark brown hair and green eyes now that I think about it.
That brings us up to today, I am now 18 and just finished high school, with plans to start college in the fall at a local university. I was planning to be home for the summer and was looking forward to it for lots of reasons but mostly for one particular reason, Jane was coming home for her last summer before graduating college. It wasn't that I had a plan or anything but she just had such a way about her that I looked forward to being around her. I knew what to expect this time so I was able to make less of a fool of myself when she walked in the door looking even hotter than two years before. She not only looked better this time around (clearly she was keeping up with the workouts), but she just seemed to carry herself more confidently. She was after all a 21 year old with just one year to go in college. I too had changed I suppose with regular weight training and a lot of swimming in our backyard pool. I already had a pretty good tan going and Jane immediately commented about how she planned to catch up to me by spending a lot of time out by the pool. She had landed a job for the summer working nights at a local health club. She had changed her major to Sports Medicine and had arranged an internship there. She would mostly be doing personal training but it was related to her degree and would look good on her resume once she graduated. My summer job wouldn't be starting until early June so at least for the first month, it would be just she and I at the house during the day.
The first week we pretty much kept to ourselves except the times when we were both out by the pool. Jane usually wore a dark green bikini that was cut nice and low on her sexy hips. She wasn’t too big on swimming and spent most of her pool time laying in a lounge chair soaking up the California sun. Sometimes she would undo her top while laying on her stomach but I can't say I ever really got a good look at anything, she was pretty modest about her body, at least it seemed that first week. After the first week we started to settle into our routine and spent more time talking around the pool. I gave her a hard time about never swimming and she offered me a few workout tips here and there. Finally toward the end of the second week we started to talk about more personal things. Jane confessed that she had fallen for a guy that turned out to be a jerk and said she was just happy being single for now. She dug a little bit into my love life but all I really said was that I dated a few of the cheerleaders in school my senior year but was looking forward to meeting new girls when I started college. She did make a few comments about me looking good and I was just happy to find that she at least noticed but I wasn't sure it really went beyond a sister being nice to her little brother. I had always thought of her as being so much older than me and I figured she still thought of me as so much younger. I still was deeply in lust for her but would never have considered making a move. We were after all brother and sister and I not only thought she would find any advances a sure sign that I was a total pervert but also assumed she wouldn't see me as old enough for her. I found out the next week that I was wrong on both counts.
It was about noon that third Monday and Jane was once again out by the pool. I walked out with a few sandwiches and started in on her about never swimming. After a while she gave in and agreed to do a few laps with me. It was after all good exercise and she had been a little lax about working out because the gym she worked at was 15 miles away and closed right when she got off work. Her only chance to work out there was if she went in early and that meant giving up what she called the "peak sun tanning hours". Before we could start to eat, Jane suddenly got up and dove into the deep end of the pool. I watched in awe as this graceful creature made a perfect entry into the pool and surfaced at the other end. I dove in after her and came up along side her. We agreed on 10 laps and took our places beside each other. As we swam slowly back and forth, I could see that Jane was tiring after about 6 laps, I guess the workouts she did were more aimed at toning that sexy body than building any kind of stamina. She stopped after 7 laps and leaned by the edge of the pool while I finished up the last 3 laps. "What's wrong sis?" I joked, "too much Thighmaster and not enough treadmill time maybe?"
"Maybe so", Jane answered, "but I got to keep it firm ya know". "Well it looks like that part is working Jane, you look great". It probably wasn't what I said as much as the way I said it because she just looked at me with a wicked look in her eyes that I had never seen before. "I've noticed you like this bikini Dave and if I wasn't your sister I'd think you had been checking me out all summer". I am not sure if my face went red at that point but I do know my cock went nearly rock hard when she said that. I just stood there a while, not sure what to say. Before I could recover she ducked under water and swam away.