This isn't actually a new topic. I sent a reply to someone once that ended up as this story (based on fact, seasoned by fantasy)
I was married for about six months to a woman who had an identical twin. I fantasized way too much about fucking the sister while I was fucking the wife. This story, though, isn't about the her sister, but about their mother. When my wife told me she wanted a divorce, her mother talked to me on the phone the next day saying she thought her daughter was crazy. She had talked to her husband and they decided that I could stay at their house for several months until I got myself together.
They lived in a double wide trailer. My bedroom had been my ex's room. One evening, while my ex-father-in-law Eddie was at a gig playing saxophone for a small jazz group, Darlene and I sat and talked while drinking some wine. She told me again how sorry she was that her daughter was so strange. She said that anyone who had what she had with me and let it go was out of her mind.
I said thanks and patted her hand as it lay on the table. She turned her hand over, took my wrist and pulled my hand to her face. She kissed my palm and then, looking into my eyes, wordlessly placed it against her breast. I was stunned by her move. I did resist the temptation to pull away...trying to be cool about all this. Then she said, "Peter, I have thought about you every time that Eddie has fucked me for the past three years. That was when Melody and I had started dating.
I know my face was bright red, but all I could say was "Really?" That's when Darlene told me that her "pussy was dripping wet right now" if I wanted to fuck her. We looked at each other for what seemed a long time, but was probably only a few minutes. Again, I said "Really".
That's when she stood up and pulled off her blouse and undid her shorts. She had a nice figure...the kind I like...small breasts, slim hips, and long legs. Darlene was standing there in her bra and panties, her hands on the table leaning forward, looking at me. This was the moment that I knew my marriage was really at an end.
I stood up then and Darlene smiled at the tent in my pants. She said Eddie won't be home for hours. We had almost the whole night. She led me down the hall to their room. When we got there Darlene closed the door, put her arms around me. We started kissing. I unhooked her bra and knew then where my ex had gotten her brown nipples.. They were tight and hard. I put a hand on one breast, squeezing that nip between the base of my thumb and the base of my forefinger....sort of scissoring it. She pressed her hips into mine and said, "take off your fucking clothes."
She sat on their bed watching me as I stripped. When my cock finally bounced out of my underwear, she smiled broadly and said, "I have been dreaming about this. I can't believe it's really going to happen." Darlene had me lay on my back on the center of the bed. She was a former dancer and had very strong legs. She stood on the bed and pulled her panties down her legs. Her cunt was bushier than her daughter's. She put a foot on either side of my waist and slowly squatted down, lowering her pussy to the head of my cock. With the target attained, she put her hands on my chest, staring with a huge smile at my face as she lowered her cunt down onto my prick.
When she had bottomed out onto my cock, her breathing was less controlled. Gasping a bit she said, "Oh my god! Your cock is in me. I've had to stop myself from yelling your name so many times when he's fucking me. It's you now Peter. You are fucking me now. I want all that you have to give."
She used those strong legs to slide up and down on my shaft. Her cunt wasn't really tight, but it was VERY wet. When I would be close to cumming, I would let her know. She would take me all the way inside her again and would stop so I could rest and get back my composure. Darlene lay against my chest quietly whispering in my ear, "she would go crazy if she knew we were doing this...and so would he." She told me then that my cock felt so hard inside of her and that she hadn't felt a prick that hard in years. She went on about all the boyfriends my ex had. How Darlene would flirt with them, but they either never got it or were too embarrassed to respond. She told me then that I was the one she wanted the most. She kissed me and whispered, "I think we should run off together."
Finally she said, "it's okay to cum inside of me, but I want to have you on top of me now Peter. I want to feel your weight pushing me into the bed as you fuck my slippery pussy and shoot your seed deep into me." I rolled her over and looked at my mother-in-law's face. She looked up at me smiling and grimacing as I fucked her. Her daughter had nothing on her in the fucking department. She was a much better lay than my ex had ever been.
It had been, by that time, a month and a half since my ex and I had fucked. I had pent up frustration in me that resulted in an amazing amount of cum. We were fucking like wild animals...the bed squeaking loudly as I slammed into her. When I started cumming her cunt walls squeezed my shaft, trying to get all of my seed inside. When we were through, I lay there on top of her and we both fell asleep.
Some time later I woke up and got off the bed. She was still asleep, her legs still open. My cock had fallen out while we had slept and her pussy had oozed semen and pussy juice between her legs. A large wet spot on the bed. I covered her with a blanket, and went to the room next to theirs and climbed into bed. I lay there thinking about that...about everything. I must have dozed off when around 3:00 a.m. I heard car wheels on the gravel driveway. Eddie was home. I got up quickly and shook Darlene until she was awake and told her. She smiled and said, "Don't worry about it. Just go on back to your room Peter."
I lay in the bed listening as Eddie walked into the trailer. I heard him put his sax away and then get something from the refrigerator. I listened as he walked down the hall. My heart was pounding with...not fear...but anticipation. I heard the door open and close. Listened as the bed squeaked. That's when I heard Darlene say, "how was your night baby?" He answered in his low voice and I didn't get it all, but heard something about the audience being really good and the band was cookin'. I heard him ask how her evening was. Darlene told him about having some wine with me. That we had talked about the situation for a long time. Then I could almost hear her whispering, but didn't discern the words. His answer I DID hear. "Oh yeah?"
After a minute or so I heard the bed start to squeak. I knew that squeak. They were fucking! My cock was standing up straight. It was still sticky with our juices. I spit into my hand a few times and jacked to the sounds of the bed squeaking. I wondered if he noticed that her cunt was wetter than usual. I listened carefully trying to hear everything. I heard Darlene's voice start to get louder as she was cumming...the same sound that had been right in my ear earlier. I heard a shushing sound...presumably Eddie trying to get her to be quiet.
The springs were going quick time now...then suddenly the sounds stopped. I didn't stop. I was jerking hard on my meat now and when I shot off some of it hit me on the neck...the rest on my chest and belly.
I stayed there just two more weeks. We fucked every time Eddie had a gig. When Darlene again said that we should run off, I told her that wouldn't work. The day after that I moved out.