As it turned out the next day it rained so I had no intention of walking down to the swimming hole. My sister came into my room, bag in hand and asked when we were leaving. I was not really prepared so I said what’s the point it’s raining! She seemed disappointed and said oh I thought it’d still be fun. I finally really looked at her and saw she was barefoot and had on these little loose shorts that were fashionable at the time. Also I could tell she was not wearing a bra. Now my sister does not have big boobs but it was obvious there was nothing between her little, rock hard nipples and her gray t-shirt. So I said, fine we can go I just need to change. She didn’t make a move to leave so I just pulled off my sweats and put on some basketball shorts making sure I was facing her while I did it.

After grabbing my bag with the towel and oil in it we started to walk down to the wooded path that led to the hole. She stayed barefoot walking in the rain which I must admit made me stare. Although her shirt was not white and sheer, the rain plastered it to her small A cups and the shape of her nipples was obvious. She mentioned that today was perfect for a dip because it was still warm and no one would be out walking in this weather. She seemed light and cheerful and very eager to get to the hole. I had to tell her to slow up a bit!

When we got to the hole she trudged up the outside bank and over the other side. When I crested the top she was already removing her top. Her dime sized areola and pebble nipples stood out hard in the rain. She took her shorts off and I could see she wasn’t wearing any underwear. Her bush was small and made of fine, silky looking dark brown hair. She waded into the water and turned to face me and said, well hurry up and get in! I peeled my shirt off and dropped my shorts all while staring at her. My fully hard cock sprung out and bobbed as I made my way into the water. She said your thing is already big today. I told her it was because I’m excited.

We waded around and chatted about this and that. When I stepped into shallower parts the tip of my hard penis would poke through the surface of the water and she would stare at it. After a bit she asked if I wanted to go lay on the banks so we got out and lay down on the sandy incline. The rain had pretty much let up but there was obviously no sun so there was no reason to oil up as we had done before. My sister was staring at my penis and said, I just don’t get how it gets that big from when I saw it small. I told her it just happens and it goes away and usually it stays small. But why is it big now? She asked and I had a hard time explaining it but I said, basically it gets hard when I see or even think of naked people and you are naked so it got hard. She said, oh so you like seeing me naked? I said of course I do, you look so beautiful! She said thanks but she worried her boobs were too small. I said, nonsense they’re amazing!

She said I like to look at you naked too. I don’t know what it is but when I look at your thing it makes me tingle down there. As she said this she ran her fingers through her bush, up her stomach and over her pert nipples. Seeing this made a drop of precum ooze out the head of my dick. She asked what it was and I used my thumb to spread it over my mushroom head. I told her it was something that the body produces when it gets excited. I grabbed the base of my cock ams slowly squeezed up so more came out and stared to drip down the head. Without thinking I wiped it on my thumb and brought it to my mouth and licked it off.

Her eyes went wide and said, it tastes good? I said yes to me it does but it’s not for everyone. She shifted from her back to her side and propped her head up with her elbow on the sand. She said, could I taste it? Without answering I stroked my cock so more precum dripped out of it. She reached over and scooped some up on her finger and put it in her mouth. oh, she said, it’s salty! She reached over again and I thought she was going for more but to my surprise she put her had around my shaft and slowly pumped it the way she saw me do it.

I gasped and she asked if I was ok and I told her it just feels really good. The precum was now flowing freely and reached her hand making it slippery and making me make even more noise. I told her it felt so good and put my arm around her to bring her closer. I caressed her naked back and slid my had over her ass. I kissed her shoulder and she turned her face to mine. I said, sweetie you’re going to make me cum. A lot of stuff will come out of my thing but it’ll feel good, ok? She said ok and kept staring at my lips so I kissed her mouth. First slowly but then my tongue found hers and she reciprocated my eagerness.

I wanted to warn her when I was about to cum but the kiss sent my first shot into the air and back down on her wrist. I moved my head to watch rope after rope of semen jet out of my cock and land on my beautiful sister. My orgasm ripped through me and I bucked under her making some cumshots hit her stomach and pubic area. My cock and her hand were covered in thick, white cum. She slowly pumped the last drops out of me and I brought her face to mine. I kissed her tenderly and told her I loved her. She smiled and said she loved me too and that was crazy! We both giggled at the absurdity of it and I said well we made quite a mess! She said, well we can wash off in the water? I told her, no, I have a better idea....to be continued