I am a 19 year old bloke, and I have a younger sister, Ana, who's just turned 18, and I have to tell you about what happened one summer day.
My father is from a Chinese background and my mum is from Australia, so both Ana and I have a mid dark complexion. And a bit more about Ana, she's about 5" 7', curly black hair, very smooth skin, athletic body, and has very recently grown 32 C tits, which have so quickly come to my attention.
Ana and I were very close as kids, being only a year apart, as well as being the only kids to our parents. We used to do everything together. We were both involved in heaps of sports like swimming and football, so we kept quite competitive and coincidentally fit.
My parents and I had gone to visit my grandma's for the day, leaving Ana by herself at home, although just before my parents picked me up from football to go to my grandma's, I decided that I wasn't really in the mood to go anywhere that day. So my parents dropped me back home, and they left straight after. I walked through the door, and couldn't see or hear Ana, so I assumed she had gone out to see her friends.
As I walked out the back, I could see Ana lying on her back sunbaking on a pool chair, and to my astonishment and delight, she was topless! She seemed to be resting with her eyes closed. It was a beautiful sight. I had thought about my sister many times before, but I had never even seen her half naked before. I just stood there, staring at my sister's goddess-like body like a cow would to an oncoming train. I pertinently scanned her entire physique, making sure she wasn't awakening.
Her legs were very smooth and freshly waxed, and her golden skin glowed in the sun, with the assistance of what must have been some body lotion she had previously applied. The only thing preventing her from complete nakedness was her tiny red bikini bottom, which her tight, round ass was desperately seeking its way out. Her flat stomach contrasted immediately with the large, round breasts, which she had accrued from her mid stages of puberty. I could tell her breasts hadn't seen much of the sun, by their slight paleness. Each of her perfect breasts slightly parted outward, resting on her slender arms, which lay beside her. Her nipples were larger then I imagined they would be, protruding about half an inch.
As I continued searching her body with my sinful eyes, I delighted upon her curly black hair, which was still quite wet from when she must have swum previously. Her hair draped across her chest, hugging the curves of her large, natural boobs. The sight was quite magnificent, even though she was my sister, I couldn't deny that she was the most beautiful girl I had ever seen.
After seeing my hot sister half naked on the pool chair, I was getting quite aroused, and my cock was rapidly growing in my thin football shorts. I thought I better leave, just in case she woke up and saw me standing there with a massive 8 ½ inch erection. I felt like taking a photo, she was so damn hot! If only my parents hadn't taken the camera. So I decided to head back inside, and not embarrass my little sister and myself. I was so excited from the fact that my sister was half naked, and was still in awe of how beautiful she was. I decided I needed to cool down from my football game, and I got ready to go for a swim, next to where my sister was. So I got my speedos, and put them on, and noticed my cock was still half solid, so it was still about 7" long and quite thick, as my cock had to curl up in my tight speedos.
I started to head to go out the back again, and was thinking how I would approach the situation and wake her up. To my relief somewhat, she had gotten up off her seat, and was standing there drying her hair with her towel, and her tits were flying and bouncing side to side as she swayed her body to dry her hair. When she stopped, she saw me, and I stopped as well, pretending as if I was completely surprised. She made no effort to cover her boobs and instead, converted her surprise into asking me why I was home. I said that I changed my mind and decided to come home. As I spoke to her, I made my best efforts to look up from her perfect breasts and into her eyes.
After I explained why I was home, she accepted it and said, "I didn't know you were going to come home, so I thought I could sunbake without anyone seeing me."
I said, "Look, don't worry about it, you know I don't care. Now, do you want to go for a swim with me, sis?"
My sister seemed to let it pass her, and she gave me a big smile and said in her sweet little voice, "Sure!"
So she ran over to where her bikini top was hanging and put it on, and I got a good eyeful of her boobs bouncing around.
Just as she tied the knot on her bikini top I ran up to her and picked her up, one arm under her legs, one under her back, and she screamed, and then laughed as I ran with her in my arms and jumped into the pool with her. She giggled, and playfully pushed me down under the water by my shoulders, and as she came down, her boobs passed down along my chest. In retaliation, I swam back up to her and bear hugged her front on, with my big arms tightly wrapped around her body, her boobs squashed up against my chest. I wrapped my legs around her ass, causing the bulge in my tight speedos to force into her red bikini bottom. I used every limb on my body to hug Ana, and there is no doubt she felt my large dick press onto her pussy.
There was nothing weird about it though, because I was just getting her back from dunking me, and we were both having so much fun. We were both laughing and giggling as we innocently wrestled in the water. I was loving it so much, as I was feeling every part of her body, up onto my bare skin. And it seemed like Ana was enjoying it as well, as I could see her large nipples were getting hard. They were unmistakable as they pressed through her red bikini top. I was so turned on from touching her and seeing her boobs.
After I bear hugged her, she tried to swim away, laughing uncontrollably as I swam after her. I grabbed her by her ankles and dragged her back to me, and when I had full control of her I decided to return the favour, and I playfully dunked her under the water right in front of me. As I pushed her down by her head, she sank down and her face scrolled into the ever increasing bulge in my speedos. Wow! She practically just touched my cock with her face, I thought. That was awesome!