22/05/2017
So I'm married to my high school sweetheart. And I've been having sex with her sister since high school. There is a weird twist to the story though. My wife knows that I've been sleeping with her sister, but she doesn't know that I know.
You see, my wife and her sister are identical twins. Julie and Ashley are so identical that nobody can tell them apart. They always did that stereotypical twin thing where they switch places as a joke. At school and with friends. Even their parents were always fooled.
So one day I'm going down on Julie, and I see a small scar on her hip. I had never seen a scar there before. I'm not saying I didn't notice it before, I'm saying that it wasn't there at all before. I was a high school boy, after all, and I was regularly having sex with my beautiful girlfriend. That scar simply hadn't been there. And that is when I remembered that Ashley had crashed her bike into their car when they were little and had gotten pretty banged up.
I was a bit freaked. I knew I shouldn't be doing what I was doing, but I figured I wouldn't have the chance again. So I fucked my girlfriends sister. And it was as great as it sounds. I was sure that the truth would come out, but nobody said a thing. Ashley continued to act the same around me as she always had, and Julie never showed any sign of knowing what Ashley and I did together.
Around a month later I was over at their house. Their parents were out of town, so I was there hanging out with them. We were watching a movie and eating pizza and having a nice night. After the movie was over, Ashley said she was tired so she went up to bed. She had hardly left the room before Julie was unzipping my pants and pulling my cock out. She gives me a great blowjob and then gets on her hands and knees. Of course I obliged her and fucked her from behind.
After she cums, she gets up and says she wants to show me something. She goes upstairs and comes back a minute later with a small vibrator. She also comes back with a scar. She drops to her knees in front of me, and starts sucking my dick. I'm worried that Julie will come downstairs and catch us, but I forget that when she tells me that she likes that my cock tastes like pussy.
When she had her fill of sucking me she straddled me and sank down onto my cock. We were making out and I was playing with her breasts as she rode me. Then she takes her little toy, turns it on and starts to tease her clit with it. And she goes wild. She is grinding on me with the vibe in between us. She begins to thrash about and yell. I know that there isn't a way for Julie not to have heard, and the idea of my girlfriend hearing me fuck her sister causes me to cum deep in Ashley's pussy.
After we had calmed down, she takes me by the hand and leads me up to Julie's room. I noticed that Ashley's door is closed and the lights are off. We climb into bed and go to sleep. I vaguely remember her getting up in the middle of the night, and in the morning I wake up with Julie next to me. That's when I received a bigger shock. I realized that not only did I have sex with my girlfriends sister, but she was not only allowing it they had planned it.
Of course I've never let on that I know. And they still switch on me fairly regularly. And yes. I have to assume that when I am fucking my sister in law, my wife has often been with her sisters boyfriends. And the first weekend in June my sister in law will be getting married. Hopefully there will be some wedding fun with the new bride.