AUTHOR'S NOTE
This is a 3 part story written in an experimental style.
If you are not starting with part 1, it is HIGHLY recommended that you read all three parts IN ORDER.
This is important to understanding the story itself and what I was hoping to accomplish.
I hope you enjoy the story, and I would be grateful for feedback regarding it and the style that I chose.
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There was nothing particularly unusual about our relationship growing up. For the most part, we got along fine, and she was only a year older than me. We had no problems with each other, nor were we particularly affectionate with each other.
Sometimes we went to the movies, played video games, or just watched TV together. It was all convenience and having the company of someone that we, at the very least, didn't dislike.
Neither of us had much by way of friends, since we were both introverts, so we were pretty much respectively sufficient. In school, we never hung out, but neither did we avoid each other.
Our grades were always easily above average, but short of the honor roll. Since our parents weren't really worried about us, academically, they did not object to her taking a year off before nailing down any major plans.
The same applied to me after I graduated, but she decided a second year off was in order. Our parents didn't exactly love that, but she promised two years was the limit, so they let it slide since she has had such a history of being responsible.
Of course, all of this concern was simply related to the fact that we were still living at home. While our parents did acknowledge and respect the fact that my sister and I were both adults, there was a limit to how much freeloading would be tolerated. Two years' worth was the limit... for her at least.
Anyway, I didn't consider either of us to be unattractive, but we'd never garnered much attention, probably due to our introverted nature. We were both lean, and you could describe us as mildly athletic. I've done more than a few pushups with her sitting on my back, but I don't want to get ahead of myself.
During her first year off, she gradually went from modest clothes and behavior to a bit more immodest. For instance, she typically wore shorts and a T-shirt around the house, but then stopped wearing a bra.
The only real reason I noticed was that the convexity of her shirtfront went from always rounded to frequently noticeable points, to one degree or another, even though she had small breasts. They were noticeable but probably large As or small Bs, not that I'm any authority on cup sizes.
Come to think of it, her cup size may have also been a significant contributing factor to her lack of garnered attention, but I digress.
Another change was her exiting the bathroom wearing a towel after finishing a shower. She'd always previously exited wearing the aforementioned shorts and T-shirt or a robe fully wrapped around her neck.
Soon, on the warmer days, she began wearing tank tops. She didn't own many, but one was particularly snug, a couple were pretty normal, and one was suspiciously loose. Furthermore, the length of her shorts went from mid-thigh to almost crotch level, and the tightness mirrored the tank tops.
I'd never lusted after my sister as a person, but, you know, tits are tits, and an ass is an ass, and both had become more prevalent, so I did glance, and I did imagine. Bear in mind that we were both homebodies, so this was a daily thing for most of the day.
Things started getting very curious when she seemed to become more careless in her posture and actions leading to me catching glimpses through arm and neck holes. She had become more slothful, so a degree of carelessness would reasonably follow, but then it started happening a lot, to the point where I began to question whether or not she was doing it on purpose.
If it was on purpose, then she was doing an excellent job of making it look accidental, but she was my sister and had shown no even remotely sexual interest in me previously, so I was giving her the benefit of a doubt... for a while.
One day, I decided to do some exercise in the living room. It was nothing major; just some bodyweight training, which included pushups. She happened to come in when I was starting those, and then she just got down beside me to do some as well.
Her count was one behind mine, but she was trying to keep in time with me. I was going at a slow pace, and after about five, she got up and decided to sit on my upper back without saying a word.
The extra weight made the next couple more difficult, but I could handle them. Then she scooted down and lay back-to-back along the length of my body. Even though she was a year older, she was shorter than I was by enough that put her head between my shoulders, and her heel nestled along the valley between my lower legs, just shy of my ankles.
I noted to myself how weirdly a perfect fit she was as I continued with the easier pushups. She lay still and quiet until I reached my limit and then I lay on the floor waiting for her to get off, or something.
No longer distracted by the actual pushups, I became more aware of the fact that, although she was my sister, I still had a female body pressing firmly against mine, and since I was wearing only shorts and underwear, the flesh of her bare calves and shoulders stood out to me.
After about five seconds I asked, "You taking a nap or something?"
"Oh. Done already?" She said it so ambiguously that I wasn't sure if she was making fun of me or not.
"With pushups, yes."
She rolled to her left and landed on her stomach with her torso propped up on her elbows.
"What are we doing next?" she asked.
'We, huh? Alright. Fine with me,' I thought. I rose to stand as I said, "Squats."
