Author's Note: I wrote this story for one of my fans Viv. I know he enjoyed it. I hope you do to. If you are not into incest between a brother and sister don't read this.
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One day while I was out with my girlfriend she said she really wanted to suck my cock and that if I hurried she would swallow it down. This got me very excited because up till now she had only jerked me off and when I exploded let my seed fall to the ground.
I told her that we could go to my house since I knew my parents were not home. We hurried to my house and headed to my room. As my girlfriend was working on taking more and more of my cock into her mouth and down her throat I was moaning and telling her how good it felt.
Just then my sister Rama opened my door and walked into my room. With Rama being 28 and I 25 she knows better than to just barge in on me like that. As my girlfriend held my cock in her mouth my sister just stared wide eyed. Rama mumbled something about locking my door in the future and without looking away from my cock left my room and closed the door.
My girlfriend was a bit taken aback by the whole event and pulled my cock out of my mouth and told me that she needed to go. I looked crestfallen as she straightened herself up and left. So there I sat on my bed naked with a hard on and a set of blue balls.
I threw on a pair of shorts and decided to go and yell at my sister for barging into my room, but found that she too had left. I didn't see her for the rest of the night as I decided to go out with some buddies.
The next morning at breakfast my sister kept looking at me and smiling. When I would catch her, she would just grin even bigger. This went on for several weeks. I also started to notice that my sister was dressing more and more provocative around the house and wondered about that.
One day when we were both home she walked in wearing a very short skirt, a low cut top which easily showed her not wearing a bra and asked if I liked the shade of lipstick she had on. When I said I couldn't tell, she moved closer to me and placing her hands on my thighs leaned in and kissed me on the lips and asked me if I could see it now. I was shocked at her action, but was blown away by what happened next.
Dropping to her knees between my feet, she unzipped my shorts and fished out my semi hard cock. Without missing a beat she began kissing the head and working her way down the shaft leaving bright red lipstick marks all over my cock. The sight of those red lipstick prints on my dick made it jump and I thought I was going to blow my load right then and there.
After covering my cock in kisses she then took the tip into her mouth and swirled her tongue around it getting the pre cum off of it. As I stared down at her, she wantonly stared into my eyes and proceeded to take my cock down her throat until her nose was resting in my pubic hair.
Then she started to pull out until just the tip was in her mouth and swallowed it whole again. She set up a nice rhythm and continued to give me one the best blow jobs I have ever had. As I got ready to shoot my load she took me all the way down her throat and swallowed string after string of my hot, salty cum.