This story is fiction.
I awoke one morning to find out that my sister was coming over for the weekend. When my parents split up, she decided to live with mom. I chose to live with dad because of the lack of rules. I am 18 and my sister is 16. She is beautiful! Long auburn hair, very athletic, and an amazing body. I have gotten off to her many times in the past but this weekend would prove to be one to remember.
She arrived about 10:30 am and immediately came in and gave me the biggest hug. I was thinking to myself, how has she changed in a few short weeks. She really hasn't but I saw her in a different light this time. Her tits seemed to double in size. At least a full C up. After her and dad talked for a bit, she asked if we could go swimming. I told her I had some running around to do and then we could go. Dad had to work so it would just be the two of us for the day.
When we got home we both went and changed, and met out at the pool. Her bathing suit was so small. Barely covering her nipples and her pussy. I could see her slit thru the fabric and I started to get ideas running thru my head. Ideas I have always wanted to act on. We both jumped in and started to play around in the pool. She got out and layed on the lounge chair and put on some sun screen. About 10 mins later I got out of the pool and I could see her staring at my dick that was showing thru my wet shorts. So I rubbed it with my towel and she got a smile that I have never seen before. A dirty little smirk. I sat down next to her and we started talking about her boyfriend. She had been seeing this guy for about 3 months and she said she has given him head, and he had a really nice cock. I asked if its the only one she has ever seen and she said yes. I said well I know mine is bigger and she said she didn't think so. I stood up and pulled it out and her jaw just dropped. (I am about 9 inches long and pretty thick.) She couldn't believe her eyes. I shook it for her a couple of times and put it away.
I offered to make lunch for us and after eating we sat in the living room to watch some tv. She sat right next to me on the couch.
We both gathered up our clothes and went to clean up. Dad would be home soon and we would be going to dinner. I realized at that point I loved my sister more than I could imagine. I think she felt the same about me.
This is my first story. If I get good reactions, I will write another one.