This is a story of fantasy, fiction, the characters aren't real, and any similarities are pure coincidental. I love feedback --- Thanks Jack
=============
It was late on Friday night when I was coming home from another disappointing party I had one of the biggest surprises of my life. Let me tell you a little about me before I get started. My name is Dean, I was 18, 6 feet, light brown eyes and dirty blonde hair. Personality wise I was very social and got laid when I could and always suffering from the perversion of my mind.
My sister Jessica is a looker 19 long dark hair, hazel eyes and had a killer smile that could always brighten a room. She was always a free spirited girl and never stuck with sports or activities, even though she was pretty good in them. My parents we understanding in our choices and pretty much understood our opinions, my sister on the other had got bored pretty easy. Body wise I am not blind my sis was 5'5 gorgeous ass and 36 c rack, growing up with her made puberty hard especially when you are stuck at home and you have a hot girl walking around with a tight t-shirt and booty shorts acting like its nothing while I transition through a state where everything gets me going and I'm beating my meat 24/7, so yes she was a fantasy.
I usually don't get home till 3 in the morning, especially on weekends like these, when our parents go off for the weekend and my sis and I have the house to us. After grabbing a beer from the kitchen I crept up the stairs to probably end up watching a movie and passing out. When I reached the top of the stairs just before I entered my room I saw that my sisters door was cracked a bit so I decided to say hi and have a little small talk, but as I approached I could hear murmurs and knew she was not alone, little did I know it was much more than that.
As I pushed open the door slightly there was my sister in all her glory standing fucking her best friend Chelsea over her bed! It was the most exotic thing I have ever seen in my life.
"FUCK me Jess!" was all I could hear from Chelsea's in between moans of being pleasured. She had one of the sexiest looks of pain and pleasure. "No..." was the next thing she moaned.
"What do you want?" my sister asked and teased as I just then noticed the huge strap on my sister was teasing her hole with.
"Put your hard cock back in my ass..." she moaned and begged "I need to cum, please... I'm so close!"
My sister had a smile of knowing she had what she wanted, control. Without waiting she penetrated her best friend's ass and resumed the playing.
What's a guy to do at such a rare occasion so I did what I did without thinking; I dropped my shorts and started stroking my cock, as my sister kept rhythm with her.
I knew I wouldn't last long especially since my sister picked up her pace and started smacking Chelsea's ass. "Take it you dirty slut!" Was the last line to push me over the edge, my knee's got weak and grabbed the door way to keep balance. It was the biggest load of my life and it went all on her door. As I composed myself I noticed my sis looking in my direction with a smirk on her face, caught in a trance she picked up pace while keeping eye contact with me.
Our stare is interrupted by the cry of Chelsea "I'm Cumming!" her body shakes and her body goes limp as her orgasm washed over her. If she looked back up at the door I was already gone back to my room.
I waited in my room till I heard them both go downstairs for me clean up the door, as I was cleaning it I noticed that the streak of liquid that a line as if someone moved their finger through it, as I cleaned the stain I decided to grab another beer.
As I was standing at the fridge door I noticed a cucumber on the shelf, my mind flashed back to the device my sister demolished her friend with, and why was I getting aroused.
