We often talked about the fact that we each sort of envied the other’s childhood. Not long after our son was born, I confessed that I felt I had not experienced enough women in my single days and wanted to try swinging. I didn’t know what her reaction would be.

Surprisingly she was agreeable and we worked on the potential issues and how we would handle them, especially the matter of pregnancy, since she wanted another child. We would work around her fertile periods and use protection.

She cautioned me about being jealous of her with another man, that I should be secure in her love, and know that we will always reconnect. She seemed to know that I was hers for good.

I knew Cass was not a virgin when we met; she was an experienced and superb sexual partner. We never discussed her past, but she had no trouble finding one of the several swing houses in the Bay Area.

It was in the East Bay foothills; a large house with several bedrooms and a tented back yard with a large above-ground hot tub. There were many chaises out there, mattresses, and a sex swing hanging from a tree limb. I was agog at it all.

“Oh good, a hot tub, that’s for me,” Cass cried. “Let’s soak.” She immediately disrobed and climbed in.

I could see one male head over the edge of the tub. She wouldn’t be alone.

“You go ahead, I want to look around more,” I needed to check out the potential female partners, and hopefully watch people fucking.

Cassie would definitely be the star of this crowd, no one compared with her. When I finally returned to the backyard, I saw her lying on a chaise with a naked man between her legs licking her pussy. Her legs were over his shoulders and her hands guided his head.

I watched from a distance as another guy strode up to them with his rather large cock hanging out. When she opened her eyes and saw it, she reached for it. Soon the guy between her legs stood up and motioned for her to turn over.

She knelt across the chaise, presenting her pussy for the licker and her mouth for the, now erect and very large, other cock. The licker pressed his cock into her waiting pussy and began fucking her. It was like watching a synchronized dance, her breasts swaying back and forth together in rhythm with their thrusts.

Before long I saw her tense up, her first orgasm rising in her belly. Her upper body collapsed onto the chaise and her legs trembled. She buried her face in the cushion and came. Her partner must have felt it too; he started slamming his cock into her rapidly until, with a yell he came in her.

I was paralyzed with a combination of fear, jealousy and arousal at the same time; I couldn’t take my eyes off them. The licker slipped out of her and left. She rolled onto her back and wiped his cum from her ass with her towel.

The other man kneeled between her legs and presented his fat cock to her. It looked to be about nine inches long, making me wonder if I should intervene, but before I could move, Cassie held out her arms to him and planted her feet apart on the chaise pad.

I thought I could see her tilt her pelvis up to align her pussy with the big head. Once he was about half in her, she wrapped her arms around his head and pulled him in for a deep kiss. I felt a stab to my heart, “Oh no! Don’t kiss him,” I screamed in my head, too late.

They stayed connected, mouths and genitals while she hooked her ankles together behind his back pulling him in fully with no difficulty. I couldn’t watch any more. I went into the house and sat on a sofa with my drink, feeling despondent and alone.

I was appalled that she would kiss a stranger like that.

Finally, a kind woman took pity on me and led me to a bedroom for a very nice fuck. She talked to me, calming my fears and reassured me that my wife would welcome me with open arms later; she was right. We made pleasant love and parted when Cass came looking for me to go home.

She had showered off and dressed. Neither of us spoke on the way home. I hugged her extra tightly in bed until we slept. In the morning we made slow tender love.

At breakfast, we discussed our experiences. I told Cassie how exciting it was to watch her fucking someone else and how it hurt to see her kissing the second guy. She assured me that, although she had fun, she had no further interest in either of them.

“For me, kissing is an integral part of the missionary position, and is instinctive. It has no particular significance except when it’s you kissing me. I have the only man I want in my life right here… though that big dick did touch some new territory,” she chuckled. “Joking.”

We agreed we would like to try again some time. About a month later we went back.

On our second try we met a woman she had known as a teenager and her husband. The four of us swapped mates and stayed together for the entire evening. This woman was not as nice as my previous encounter, but Cassie seemed to enjoy her husband, they fucked twice with the woman joining them the second time, as I watched entranced.

That was my first exposure to girl-on-girl sex. We parted after exchanging contact details and promising to meet again.

Jill and Frank are a mixed-race couple. Frank is black and also has a bigger dick than me. They seemed ideally suited with us in temperaments and sexual preferences.

Over the next few months we saw no need to return to the swinging with strangers scene; we were exclusive with them. The women bonded almost immediately; they became like sisters, nearly inseparable.

Watching Cassie with Jill was very different from her and Frank; the tenderness with which they touched and kissed each other seemed too private to watch. They were in their own world.

When she opened her arms and legs to welcome Frank’s big cock into her waiting pussy, I felt like joining them. On more than one occasion I guided Frank’s throbbing cock to her pussy lips and I fantasized licking her clit as he slowly pressed himself deep in her.

That her anatomy could accommodate the insertion such a large object and get pleasure from the act amazed me endlessly, and I wondered if he and I could both fit. I once suggested that to her, but we never actually tried it, though she had said it sounded interesting. Who would be on the bottom?

We did try a variety of mix and match situations; I learned how to give head to another man and so did Frank. The women shared their bodies with each other too. It turned out that Jill was already pregnant when we met, allowing me to forgo condoms.

When Jill became too far along for regular sex, we all found other ways to enjoy each other.

Cassie’s pussy was always very loose after she and Frank fucked. She was always wet when we fucked, but he left her wide open and more slippery than I did.

He took his time fucking her, making her cum again and again before filling her pussy with his sperm. Each time she came, she kissed him lustily. She always thanked him as his cock slipped from her, followed by his semen.

She rarely came with me after him, but she was always extra caring and whispered love words as she held me in her, soothing away the jealousy I felt.

Before long, Cass decided she was ready to complete our family, so we took a break until I impregnated her. She told me that when we had a second healthy child, she intended to have her tubes tied.

“So that you can be promiscuous?” I asked jokingly.

“No dummy, I will have my perfect family, two beautiful children, and a wonderful husband who loves me. I intend to be a loving wife and mother, and we can have sex at will with no worries. I don’t like birth control pills.”

“What about Jill and Frank? Are we ending it with them?” I was not ready to stop sharing her.

“I’m sure we can enjoy their company for a long time yet. She and I are becoming quite close.” I remember that they were spending a lot of time together.