After dinner, we settled down on the couch in the living room to commence the evening's sexual festivities. To start out, Jean sat on my lap, and Sharon on Walt's. We started simple -- kissing and petting like high-school kids, except for the fact that we were all naked, and married to the opposite spouses. I kissed Jean passionately, probing with my tongue to the far corners of her mouth, and intertwining my tongue with hers. With one hand, I reached around her and fondled her breast; with the other, I fingered her pussy. She was purring happily as I tweaked her nipple, and again as I diddled her clit with my thumb, while driving two fingers in and out of her vagina. I looked over at Sharon and Walt, and they were doing the same thing, in the same position.

Jean was starting to grind her pelvis against my hand with greater urgency, when suddenly she got up off my lap, knelt between my knees, and started sucking my cock. And, at the same moment, Sharon did likewise to Walt. It was as if their movements had been choreographed.

My cock was standing straight up from the jungle of my pubic hair, precum oozing copiously from the tip, as Jean stroked it with her hands, then leaned in to lick and suck it. Walt's cock was likewise rigidly erect under Sharon's loving attention.

Then suddenly, both women stopped abruptly and looked at each other.

"It's time," said Sharon.

"Yeah," replied Jean. "Let's go."

And with that, they both stood up, pushed the man they'd just been blowing back onto the couch, and straddled his lap. Then they both slowly lowered themselves onto the cocks that were new to their pussies.

I watched wide-eyed with wonder as Jean's pussy lips touched the tip of my cock. I looked over at my wife, and her pussy was likewise situated against Walt's cockhead. Both women paused and looked at each other, then, with a wink and a nod, they continued downward. I felt Jean's cunt-lips open around my cockhead as she pressed herself onto me. Once I had entered her, and she was sliding down my shaft, I saw her eyes get wide as my thick cock spread her opening farther than Walt's ever had. Her cunt was incredibly tight, and I reveled in the sensations of being inside her, feeling her silky-smooth vaginal walls snugly embracing my erection. When she had taken me in completely, and her pubic hair was intertangled with mine, we both just sat still, savoring the sensations of a friendly but new sex partner.

I glanced over at my wife in time to see her eyes get wide as Walt's long cock was completely inside her, probing deeper into the far corners of her vagina than I had ever been. The two of them also paused for a few moments to savor the different sensations of an unfamiliar partner.

"My God!' Jean gasped, "your cock is so thick -- I just feel so. . . spread open! God, Sharon -- and you get this whenever you want!"

Sharon grinned. "Mmm-hmm; told ya. And your guy's equipment is amazing too. I have never been penetrated so deeply! So lovely . . ."

Slowly, Sharon and Jean began to grind their pussies on their respective erect cocks. Just the difference between Jean's vagina and Sharon's was almost intoxicating. And Jean's body moves in some delightfully different ways than Sharon's does -- her longer, leaner body generates smoother, gentler strokes, as compared to Sharon's shorter, more powerful ones. Jean seemed to squirm on my cock more than she did on Walt's, as if she was adjusting to its thickness. It was like adjusting to the movements of a new dance partner, except this was a much deeper and more intimate kind of dancing.

I watched my wife with Walt. She seemed determined to drive him as deeply into herself as she possibly could, as if exploring new corners of her womb on a cock that could finally reach them. And Walt seemed to be getting his mind blown by Sharon's powerful movements.

I don't know how long we fucked like that with our new partners, but it was a while. I just wanted to savor the new sensations from Jean's pussy for as long as I could. At last, Jean started grinding faster on me, until she was bobbing up and down on my cock at a furious pace. Which was more than I could stand. "Jeannie, I . . .", I tried to say, but before I could complete my sentence, my cum shot out the end of my cock, into her. "Oh, yeah!" she cried. "You're coming in me! Walt, honey, he's coming in me!" She continued bouncing on me until it was almost painful, the sensations were so intense.

Walt and Sharon weren't far behind us. I hadn't even caught my breath before I heard Walt grunting involuntarily as he blew his load into my wife.

We all just sat quietly for a while after we'd finished. We were very conscious of the significance of what we'd just done, but there were no regrets. Walt and Jean were still our best friends. We couldn't have done it with anyone else; no one else was intimate enough with us, or had our trust enough, for us to share our lives, and our bodies, like that.

Even so, it seemed right, even necessary, for us to return to our own spouses and make slow, intense, passionate love for a long time afterward.

*****

Saturday was to be our last full day at the cabin, and we were determined to end with a flourish. As we had the previous weekend, we went skinny-dipping early in the day. This time, there was much more playful groping going on. In the few days I'd had access to them, I'd really come to enjoy Jean's tits, and her pussy, almost as much as my wife's.

We went back to the cabin, and all four of us piled into Walt and Jean's bed, which was a king-size. The two women laid side-by-side on their backs, even holding hands, and Walt and I fucked them missionary-style. After a few minutes, one of the women would call for a switch, and Walt and I would trade places. That ended up being very cool -- a very direct comparison of the two women with each other, and an experience of both their bodies, both their vaginas, and the differences between them, cycled through repeatedly many times over. Jean and Sharon rolled through orgasm after orgasm, and Walt and I sent buckets of our semen into them. It was a very erotic sensation to fuck one or the other of the women with my cock sloshing through a thick soup of Walt's cum mixed with mine.

After that, we took a recovery break to grab some dinner, and let Walt's and my balls refill, before returning to the bed. At first, we just rolled our bodies together, savoring all the naked skin and body parts sliding against each other. And then suddenly, things took shape out of the chaos. I saw my wife's pussy in front of my face, her cunt-lips engorged and wet, so I reached over and slipped a couple fingers inside her, cupping my palm over her mound and rubbing her clit as I stroked my fingers in and out of her. Then I slid myself up under her and pulled her onto my face so I could eat her pussy, while she ground herself against my face. I became aware that, while I was eating my wife, she was busy sucking Walt's cock. And then, a few minutes later, I felt another mouth on my own cock. I glanced down to see that Jean had taken her place above my groin, and was blowing me while Walt ate her pussy, and the four of us made a complete circle of mouths tending to sex organs.

After a while, Jean sat up and pulled away from Walt's oral ministrations. "I need a cock inside me," she said, and she quickly climbed astride my hips. Raising herself up, she positioned her entrance against the tip of my cock and rammed herself onto my manhood, groaning, "Ooooohhhhh, yessss!"

Sharon saw what Jean was doing, and quickly climbed over to straddle my head, so I could continue to eat her. So Sharon was riding my face, while Jean rode my cock. The two women leaned together and embraced each other, so the three of us formed a triangle with our bodies.

Both Jean and Sharon were groaning in pleasure as the three of us ground together. Walt lay alongside us on the bed, slowly stroking his cock, watching our threesome in erotic wonder and awe. I had the worst seat in the house, as my wife's ass grinding on my face pretty completely obscured my view of anything else (not that it was an unpleasant view, in the least). Suddenly, I heard Walt suck in his breath sharply, followed by a long masculine groan from his throat. I strained to move around enough to catch a glimpse without disengaging from Sharon's pussy, and out of the corner of my eye, I could just barely see that Jean and Sharon were engaged in a sexy erotic kiss, their jaws and tongues moving feverishly in their lusty excitement. With one arm, they held their tight embrace, but each had her free hand on the other's breast, cupping and stroking and kneading the soft, firm flesh.

In short order, both women sat straight up. Holding each other by their forearms, they increased the tempo of their grinding, and soon both of them were squirming and writhing in orgasm -- Sharon on my mouth and Jean on my cock. I strove manfully to hold off my own climax, but my resistance was futile, and soon I was gasping and panting as I shot my hot seed into Jean's cunt.

After beholding the spectacle of Jean and Sharon and me sharing a threesome, Walt was ready for some action of his own. "My turn, ladies!" he gushed, and quickly, Sharon took her place at his loins, while Jean mounted her husband's face, her pussy newly-filled with my cum, which was beginning to ooze out of her, and onto Walt's chin. I couldn't believe that Walt was actually going to eat my cum out of his wife, but he didn't hesitate.

Even Jean was taken aback by Walt's raunchiness. "My Sweetheart!" she exclaimed. "Are you really eating Ben's cum out of me?"

Walt just continued orally plundering his wife, letting a muffled "Mmmm-hmmmm!" escape from between her legs.

Once again, Sharon impaled herself on Walt's long stick, squirming and twisting to stir her insides from every possible angle and direction. Once the two women had settled into their respective positions atop Walt, they returned their gazes to each other.