Exercising with Brittany

Brittany and Ann are as attractive as any sisters in their 30s that one will find. Brittany had been married to a guy named Jack for about six years now, and Ann had been married to me for almost four. Both Jack and I were hopelessly attracted to our respective wives and enjoyed good marriages, which seem to be harder and harder to find these days. More than a year ago, the dynamic of the relationship among the four of us changed significantly, and our marriages have gotten only stronger as a result, at least in my case.

Before I was even on the scene, it had been uncovered that Jack thought Ann was hot, as any red-blooded male does. Not that he would ever risk his relationship with Brittany, but if he were going to have sex with any other woman, it would be Ann. No one could honestly blame him. Ann has an ass and boobs no one can ignore, and her beautiful brown eyes, smile and dark brown hair are captivating. Her dark Italian skin is just a bonus. She stands about 5'5", and even after adding a little weight since having a baby, she still keeps it tight.

Years later, the girls caught me in the same trap. I would be lying if I said I didn't find Brittany attractive from the start, but it would be equally false to say I thought she was hotter than Ann. Still, she often stole my attention. She's not as tall as Ann, at maybe 5', but after that, the two are very similar. I will admit that Brittany has bigger boobs, which to this day still stun me - and that is saying something because my wife's breasts are awesome. Brittany also rocks a tight, round ass, like her sister. I've been caught staring at those two parts of her body more than once. Equally entrancing are her big, bright brown eyes, a lighter shade than Ann's. Her hair, a little longer than my wife's, is also a lighter shade, as is her Italian tan, which is a beautiful light brown.

One more thing that my wife certainly has on her sister is a tighter pussy, a fact both Jack and I have now experienced. Yes, things really took a turn, not when I finally confessed that my wife's sister turned me on, but there was that one night toward the end of a party when both girls were caught in a similar trap they often put us guys in and so chose each other as the girl they would kiss. They didn't kiss that night, but Ann did reveal to me later that she had in fact kissed her sister in the past - and much more.

Since then, while Jack and I have never performed alongside each other, we had both enjoyed threesomes with the sisters as well as a couple spouse swaps. There would have been more swaps too, but there were a couple times where I just didn't want to pass up a night with my wife. As sexy as Brittany is, Ann is always sexier, in my estimation. Of course, that door for another switch remains open in case the appeal of something less familiar wins out.

The first few times we did something outrageous, we said it would be the last. In fact, following the first switch, it was really uncomfortable for all four of us to be in the same room afterward. We hadn't all fucked in the same room, but different floors in the same house. Having solo sex with Brittany was by far the hottest experience I had enjoyed that didn't involve Ann, but the aftermath had me convinced it wouldn't happen again.

Since then, though, we all moved past it, and the attraction to each other's spouses (Ann and Brittany revealed they are likewise attracted to Jack and me, respectively) remained too strong not to act on it, now that we had indulged ourselves. The sessions were infrequent, and on at least one occasion interrupted, but just the possibility of some extra fun made it all the more exciting to hang out with my sister-in-law. What I would really love is teaming up with Jack on either or both of the girls, but to this day he is still too uncomfortable with sharing a girl with another guy. On the other hand, Ann and I have no such qualms with having more men in the room.

The most recent episode came just this past weekend. Not long after Ann and I had taken a short vacation (during which I had shared my wife in a hot six-man gangbang), Ann was texting while we were watching TV after putting our daughter to bed. I wondered whom she was talking to but I never ask. Suddenly, she matter-of-factly said, "Brittany's coming over Saturday to work out. Should we have sex with her?" From all appearances, we were as wholesome and normal a married couple as you'll find. Then there are moments like this.

My eyes widened, and I was thrown off by the question. "Yeah," I said, like it was no big deal. "You and me with her?"

"Mmhmm," she said. "I was just thinking it's been a while and it would be fun." And so it was settled.

Saturday rolled around like any other day. We put our daughter to bed around 7:30. She was still too young to be aware of what would be transpiring elsewhere in the house and slept through anything at night anyway. When Ann and I work out, it's right after we put the toddler to bed, so everything remained normal. Brittany was running late, so I started out on a short jog while Ann set up the living room. By the time I was back, Brittany's car was in the driveway. I proceeded downstairs to work out a little but heard both girls doing their cardio workout in the living room. After my workout, I showered in the downstairs bathroom while Ann and Brittany were finishing up.

While I was in the shower, both girls came into the bathroom, I guess to tease me. A couple years ago, I would have locked the door while in the bathroom when Brittany was around, but obviously I had nothing to hide from her anymore as I was showering. Nothing happened right there beside some playful conversation as I finished up and then dried myself off, not at all concerned about stepping out naked in front to my sister-in-law, but not flaunting it or anything. I did feel confident about how I looked, having just worked out. Following exercise, my muscles really bulged out of my tall, thin frame. As I put just a pair of shorts on (knowing whatever clothes we put on would be off soon enough), I left the bathroom with Ann following behind me as Brittany took her turn in the shower.

It was a good hour at least before both girls were done showering. It was agonizing.

I watched TV with Ann while Brittany got clean, and then the girls switched. Brittany was wearing gym shorts and a tank top as she sat next to me on the couch and chatted with me. I kind of wanted to make out with her while we waited for my wife, just to get things prepared, but I felt like that would be cheating on Ann since she wasn't in the room yet and she hadn't given her express permission. In fact, I had kissed Brittany fewer times than I had fucked her. Anyway, Ann finally finished washing and drying her hair and joined us in the living room wearing nothing at all.

"Hey, hot stuff!" Brittany said as I immediately turned off the TV. It was almost 10 pm, and I for one was ready and rearing to go. Ann did a sexy little dance move with her hips while grinning at both her sister and her husband, who admired her flawless bare body.

"How about you?" I said to Brittany as I pointed to her sister. Brittany smiled, clearly a bit nervous, but stood up and without delay took off her top. There had been no bra underneath, so she went right to the main attraction, showing off her stunning boobs. While my wife's strutting in naked had gotten the blood flow started to my penis, seeing Brittany's big boobs on that small frame had me fully hard in an instant.

"Your turn!" Ann said to me, but I deferred back to them as I left on my only piece of clothing for now.

"Maybe you can show me a little something first," I replied, pointing to the ottoman in front of us. Ann took the cue and sat down on the piece of furniture, her legs out in front of her, her left side facing me as I sat on the couch and squirmed, refraining from touching myself for a moment longer. Brittany, wearing only those short shorts, got on her knees between Ann's legs, which spread to make room for her sister's head. Brittany pushed her hair to the side, which Ann then held back for her, as my sister-in-law's tongue poked out and pressed against my wife's eager pussy.

Ann writhed, her pelvis pushing forward as Brittany pressed her face against her sister and began to eat her out. At this point, I took my shorts off because my cock needed to breathe. I couldn't help but stroke it as these two gorgeous sisters played for my enjoyment. Anytime Ann and I have group sex, it is so surreal. I can't believe how lucky I am to be married to this woman. Whenever it's with her sister, I am even more in disbelief.

Brittany ate Ann out like a champ, and Ann was really enjoying it. Eventually she lay down on her back on the ottoman and kicked her legs out while Brittany really got in there. Using her fingers, tongue, lips and teeth, Brittany pleasured every part of my wife's vagina while I remained in silent awe, aside from the fapping sound I made as I masturbated to this glorious spectacle. Ann hung on to the ottoman and rested her heels on her sister's back as Brittany now alternated between her mouth and hand, giving each a turn to rest as she orally serviced her big sister.

Before long, Ann came with a loud cry, and Brittany stood up, satisfied with her work. As Ann took a moment to come down from her orgasm, Brittany removed her shorts so that all three of us were completely naked. As Ann sat up, Brittany sat down next to me and complimented my dick, replacing my hand with her own for a minute and leaning over to suck just the tip for just a couple seconds as she stroked my shaft. Just the brief contact of Brittany's mouth on my cock sent shivers down my spine.

"Hey!" Ann said as she was now standing over us. "That's my man!" She then got to her knees on the floor in front of me and took my dick away from her sister so that she could take her turn giving me a brief blowjob while Brittany watched. I was in heaven.

Ann then slid over so that she was kneeling in front of her sister instead of me. Brittany spread her legs, her toes still on the floor, and put one hand on Ann's head as she gently guided her sister's mouth to her pussy. I observed on the couch next to my sister-in-law for a minute while my wife licked Brittany's pussy. Ann relented for only a few seconds and only to tell me to fuck her from behind while the girls remained in that position. I wasted no time setting up behind my wife and quickly inserted my aching cock into her tight, wet pussy. As my manhood sank into her, I put my hands on her waist and began to fuck her while she ate out her squirming sister.

I cursed and moaned as I fucked my wife while she fucked her sister. As much as I enjoy watching my cock plunge into my wife when we have sex, I couldn't help but watch Ann pleasure Brittany while Brittany writhed and moaned on the couch. That's not a sight I get to see too often. I hammered Ann uncontrollably, as I was utterly aroused by what was in front of me. We were all moaning as my flesh slapped over and over again against my wife's behind. Ann eventually pulled her head away and shifted forward, now using her hand to prode Brittany's pussy while her mouth now took turns on Brittany's tits and lips. Ann fingered her sister furiously as the girls kissed, driving me mad with lust as railed my wife hard and fast from behind.

Soon, Brittany was cumming. Ann pulled her hand away, and I grabbed Ann's tits and held her against me as I continued to fuck her pussy from behind. As I did so, Ann said to me, "If you make me cum, I'll let you make her cum." I accepted the challenge.

I pulled out briefly, and my wife and I stood up. As Brittany stayed at one end of the couch, I lay Ann down on the other end. She spread her legs for me and helped guide my cock back into her pussy. Once I was inside, I held Ann's legs up and out as I pumped in and out of her, admiring her sexy body as it took my hard dick. I paid no attention to Brittany for the next few moments as I made love to my amazing wife and worked on getting her to a second climax for the night.

After a minute, I lay down on Ann, her boobs pressing against my chest, our mouths fighting with each other as Ann wrapped her arms and legs around me, keeping me tight against her. I pumped in and out of her, needing to slow down a couple times so I wouldn't cum too soon. I was saving that for my sister-in-law. Before long, though, I could tell Ann was approaching another orgasm. As she panted and moaned, soon enough her breathing grew ragged. Finally, she moaned loudly, cumming on my cock as I fucked her through her orgasm.

As Ann cried out, Brittany got my attention back. "My turn!" she said. My obsession with my wife's sister waxed and waned between simply noticing her and desperately wanting to fuck her. There had been plenty of moments like the latter since I had last had a satisfying session with Brittany, so I was more than ready to unleash that pent-up lust on her. After pulling out of my wife, I allowed Ann to lie there for a moment and catch her breath as I shuffled to the other side of the couch with Brittany.

My initial thought was to take Brittany in the same position I had finished off my wife, but Brittany took charge, having me lie on my back while she straddled on top of me. Then, as Ann sat up at the other end, Brittany lowered her small, sexy body down my cock until I was fully inside my sister-in-law. We both moaned in unison while my wife watched on, a satisfied look on her face. I took this opportunity to squeeze Brittany's boobs just as she began shift her body up and down me, riding me like she had done so well on a couple other occasions.

Once Brittany was really going, I released her boobs so I could watch them bounce up and down while their owner skillfully rode me. It was encouraging to see how much fun she was having fucking me! After a few minutes, I knew it wouldn't be long until I came, so I pushed her onto her back, my cock only momentarily slipping out of her pussy. We landed right beside Ann, who smiled and rubbed her sister's boobs for a brief moment while exchanging a kiss with me. "Make my sister cum," she whispered. I can't imagine she wanted me to make Brittany cum that bad, but she knew just how turned on that statement would make me. After all, everything we did sexually, whether just the two of us or with others, was always to please each other.

We adjusted our positions on the couch, and Brittany lifted her legs so that she was practically folded and half, leaving her open pussy in full view. I can't remember exactly what she said but the idea was she wanted me to fuck her hard. I then lay on top of Brittany, slipping my cock, which was as hard as could be, back deep inside her wet hold. I wanted to feel those breasts against my chest as I hammered her cunt, so I slipped past her legs so they were straight up in the air around my waist. Meanwhile, Ann stayed put, kneeling on the couch and scratching my back while Brittany kept her legs kicked out and put her hands on my ass. I pounded her pussy as hard and fast as I could, unleashing all that desire to fuck her. She had been a tease for too long and was now paying for it.

I want to lie and say I got Brittany over the edge. The truth is she kept coming close and just not getting there. It's much easier getting Ann to cum since we have such a connection, which I simply can't establish with anyone else. It was still intense, my cock rock hard the whole time, plunging deep inside my wife's sister again and again, nailing her to that couch. By the end, our flesh was slipping against each other's, so coated were we both in sweat. At the last second, Brittany was climbing to another climax, but I was railing her so hard to get her all the way there that I was about to cum myself. She begged me to stay in, but without protection, I couldn't take that risk. I finally pulled out, my dick ready to blow. I really wanted to cum on Brittany's pretty face, but I figured she would be pissed if I got it in her hair, since she had just washed it. Since I hoped to fuck her again someday, I opted to point my penis at the next best choice. With a loud moan, I shot a huge load all over those big tits, launching rope after rope on that sexy chest. By the time I was done, I was so overwhelmed from pleasure that I thought I might fall over.

After taking a moment to recover, I helped Ann clean her sister off with a rag and then got both girls to their feet. Brittany got ready to leave while Ann and I put the living room back together. I told Brittany she had better get home to Jack before he starts wondering where she is, but she said he was already well aware of what she was doing at our house. Honestly really has worked out well for both of these marriages! Brittany added that Jack would get his turn with the two girls again soon, to which I responded by saying I would be more than happy to make it a foursome if Jack changed his mind about that kind of setup.

"Don't count on it," my sister-in-law said, "but don't worry. I'll need to have you again soon so you can give me that orgasm you owe me."

"That's a debt I don't mind repaying," I said, or something along those lines. "In fact, I'm going to hold you to that." With that, she left, and Ann and I cleaned up a bit and headed to bed, but not before a hug and some kissing. No matter how unusual or sex life got, it always worked only to enhance our relationship. Plus, we were going to be in great shape if we kept exercising like that!