My sister Kim is a few years older than me. I have thought Kim was hot for some time know.  I often masturbate while I watch her from my room when she is in her bikini sun baking or swimming.

 This day our parents were out I was sitting by the pool when Kim comes out. She stood next to me and asked me if I would rub some sunscreen on her. I stood up and rubbed the sunscreen on Kim's back, then she turned around and took off her bikini top.

 "Now the front." she said.

 I stood there staring at Kim tits and my cock got hard.

"Go ahead, I know you want to, I have seen you watching me." Kim said.

I started rubbing sunscreen on my sister tits, and it was really turning me on. But then Kim went even further and took of her bikini bottom. My mouth dropped and my eyes popped out, I was staring at Kim's pussy. I had thought about seeing Kim naked I had masturbated over the thought, and here I was looking at my naked sister who then told me to rub sunscreen around her pussy which I willing did.

 "Now I get to rub sunscreen on you." Kim said.

She rubbed it on my back and my chest.

"Know your cock." Kim said.

But I stopped her, my cock was so hard I didn't know if I wanted Kim to see it, and if she touched it I thought I would cum. I told Kim about this, and she said she wanted me to cum. So I let her rub sunscreen on my cock and I did come in Kim's hand she smiled and licked my cum off her fingers.

"Now you make me cum." Kim told me.

 So I rubbed her pussy and made her cum, I made my big sister come. That is as far as we went.

 The next time we were alone Kim came into my room walked up to me and pulled my pants down knelt down and took my cock in her mouth and sucked my cock. My totally hot sister was sucking my cock. When I came in her mouth she swallowed all my cum. Kim remove her panties and laid down on my bed and spread her legs.

"Lick me" she told me.

  Being the good obedient brother that I am I started to lick. I was the first pussy I had tasted and it was my sister's. I lapped up Kim's juices as she came on my face. I wanted to fuck Kim's then and there but she said I would have to wait.

 My chance came when our parents went away for a week.

 It was time to go all the way. I told Kim I wanted to fuck her. She took me by the hand and led me to her bedroom. We took off our cloths.

 "Lay on the bed" Kim told me.

 When I was on the bed Kim got on to of me and lowed herself onto my cock. The feeling of my cock sliding into my sister's pussy nearly mad me cum right then. Kim rode up and down on my cock. Her beautiful tits bouncing in front of my face. I couldn't hold out long.

 "I'm cumming" yelled.

"Fill me with your cum" Kim replied.

Which is just what I did.  We fucked constantly for the next week. We never wore cloths the whole week. My cock felt so good in Kim's pussy and the fact that she is my sister made it so much better.

 Kim moved out some time later into a place of her own. I was very happy about it because it meant I could go to Kim's when ever I wanted to have sex with her. Which meant I spent most of my time there. I never felt as happy as when Kim and I were fucking.