Editor's note: this story contains scenes of incest or incest content.
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Just one week after a surprise wife/sister swap this fall, I was treated to another unexpected proposal from my lovely wife of three years. The night started as unassuming as any other, or at least with as little likelihood of what was to occur as any other. My little family and I met up with my father-in-law's side of the family that night at a restaurant for a traditional birthday party. Of course, all but two other people there had an idea of the sexual exploits my wife and I had been toying with over the past year or so, and those two were Brittany - Ann's sister - and her husband Jack. Everyone else would have been shocked to have heard of any of the details from even just one out our special outings.
Now Ann and Brittany made for as attractive a pair of sisters as I have ever seen, personally. Most people agree with me that Ann is the better catch. At 5'5" with a slender, tan frame, she is also armed with a good set of boobs and a tight ass that drives men wild. She has a very pretty face with dark brown eyes, dark brown hair and a captivating smile - all of that to say nothing of her fun, sweet personality. Brittany is no slouch though. She is shorter, maybe 5', with eyes, skin and hair that all are a lighter brown. Her ass is rounder and her boobs certainly rival Ann's, especially for such a small girl. She too is, obviously, a lot of fun as well.
The party didn't get off to a great start for us. It was clearly bedtime for our toddler, and she made sure we knew it. I ended up going home to put the kid to bed, and Brittany agreed to bring Ann home later. It was a appropriate end to what had been a stressful week for me.
About two hours later, Ann came through the front door, followed by Brittany, whom I did not expect to see. Even though I had sex with Brittany just a week ago, I still would have worn more than just the bed shorts I had on at the time if I had known we we having company. "Hi!" Brittany greeted me with an unmistakable excitement in her voice. Maybe I was too tired to process anything at the moment, but it seemed like something was up.
"Brittany thought we could all use a chance to blow off steam," my sweet wife said, a grin on her face. "Is the baby asleep?" I nodded my head, my hope immediately soaring as it started to make sense to me what was happening.
"Well then," Brittany chimed in as she took her coat off, "Let's get started. The living room?" Ann and I agreed with Brittany on that location. Typical of Ann, I had to grab a couple sheets for us to do the act on and a couple rags for cleanup.
"You two need to catch up," I said, when I came back down the hall, referring to the fact that I had but one piece of clothing on. They both giggled and joined me by the couch, undressing right in front of me as if it were a normal thing we were doing. Before I knew it, I had two gorgeous sisters standing naked in front of me, both of them clearly giddy about the outrageous thing we were about to do.
In an attempt to break the ice, I stood up and kissed my wife, who responded by reaching into my shorts and stroking my cock to full hardness, which didn't take long at all. I tossed the shorts aside, and we backed up toward the ottoman while Brittany trailed behind. I lay Ann on her back on that piece of furniture, and she lifted her legs while I stood in front of her and moved right along, pressing my cock against her pussy and sinking in while her little sister watched.
I wrapped my arms around my wife's legs and began to fuck her while Brittany climbed up onto the ottoman too, then squatting over Ann's head and sitting on her face, smothering my wife with her pussy as I stuffed Ann's own cunt. Ann put her hands on her sister's hips and held Brittany in place while beginning to lick that vagina that I had stuffed exactly one week prior. Brittany threw her head back, letting out a sexy moan as her long, brown hair flew around.
Watching my sexy sister-in-law law grind on my wife's face made me pound Ann only harder and harder. Ann's boobs jiggled up and down in sync with my cock's diving deep into her pussy over and over. I was breathing raggedy within a minute, slamming into Ann, my balls slapping against her taint as I watched make oral love to her beautiful sister. The three of us continued in this formation for a couple minutes, having a blast. Brittany grinded her pussy on Ann's face as we grinned at each other and held my wife in place on that ottoman. At last, Brittany raised herself, allowing her sister some fresh air. Brittany then stepped aside, and I took the opportunity to pull out of Ann and consider a new position. Right now, I was dying to touch Brittany.
"I want to watch you fuck my sister," Ann said as she sat up. Despite the fact that I had now had sex with Brittany twice and had a threesome with the sisters once before, I had never actually penetrated Brittany in Ann's view. I hadn't been sure how Ann would feel about seeing me inside another woman. Brittany, though, was not just another woman to either of us. Now that I had her clear permission, I positioned Brittany in front of the ottoman upon which Ann reclined back onto her elbows. I couldn't help but fondle my sister-in-law's luscious boobs and even kiss her neck as I stood behind her. Then I bent Brittany over like a whore as I set up.
Both girls looked at me as I pressed my cock against Brittany's folds, Brittany turning her head to peer over her shoulder, and Ann tilting her head to look past Brittany's upper body. Once I had my head in, I put both hands on Brittany's hips and sank balls-deep inside her, moaning as I did. Brittany moaned too, turning her head forward, and Ann grinned. I sank my nails into Brittany's flesh and then proceeded to pump in and out of her.