The warm weather prompted Grace, my lovely wife of 24 years, to don her skimpy yellow bikini to sunbathe by the pool of our time-share condo in Florida.

Because it was a weekday mid-afternoon, she had the pool area to herself. In a way I was sorry. Grace in her late 40s can pass for mid-20s, and I enjoy watching men check her out.

Inside, I was watching a baseball game, occasionally glancing out the sliding glass doors to look at my woman. The ball game was fairly dull, and I dozed off. When I awoke, the game was over but I saw outside that Grace had company. A huge bodybuilder type was kneeling by her chaise rubbing suntan lotion into her back. His hands slid downward, spending significant time on her thong-clad ass, then moving down to her thighs, calves and feet.

Grace’s top was untied, and Mr. Universe was ogling the sides of her tits, crushed under her as she lay on her stomach. To get a better look I jumped out of my recliner, but by the time I got to the window Grace wasn’t in her chaise. Scanning the area, I saw her walking with her new friend toward the wooden building that housed an indoor hot tub.

My instinctive reaction was that I had to see more. As they entered the building, I left the condo and made my way there. Luckily, the hot-tub room had a window, and by chance the blind that usually covered it had been lowered carelessly, leaving just space enough to peek through. And there was my buxom wife standing in the hot tub in the muscleman’s embrace, kissing him wildly!

I know I shouldn’t have been turned on, but as I watched the two of them — with her tongue circling his, bobbing in and out of his mouth, and his hands pawing her voluptuous tits — I was afraid my already rock-hard cock might explode!

Grace’s hands were in the water, stroking the guy’s cock, I assumed. As he pulled her closer, reaching down to play with her ass, she pressed her upper body into him with unbelievable sexual aggressiveness. All at once her arms came up and wrapped around his neck, and at the same time she slung her legs over his hips, locking her ankles behind his back.

By the look on Grace’s face I knew the moment the guy entered her. Her head fell back, and she began pumping away at him while he stood firm, bracing her. Surprisingly quickly, the stiffening and spasming of her body told me that she was coming. Her head rose back up, and I could read her lips crying out, “Fuck me! Fuck me hard!”

I was suddenly startled to hear a voice behind me say, “All right! Looks like Grace is back in town, and Little Anthony’s got first dibs!”

Stunned, I turned around and saw another huge guy looking over my shoulder. He smiled, then stuck out his hand, introducing himself as Hack. I stammered, “You — you know them?”

Hack said the guy was his brother and the woman was an out-of-towner who had a vacation place here. She came several times a year, usually arriving mid-week, several days ahead of her husband. “She’s a wild one!” he said, heading for the door. “And it’s time for me to get some!”

I backed away from the window, wondering if Hack would inform the others that someone was outside watching them. But after a minute my curiosity got the better of me and I moved cautiously back to the window.

Not-so-little Anthony was still fucking the shit out of my wife, while Hack took off his clothes. He was already hard, and I was amazed at the thickness of his cock. He sat on the edge of the tub and called out to Grace, motioning with his finger for her to come to him. She hopped off of Anthony and waded over, then wasted no time placing her head between Hack’s legs and attacking his cock. For me this was even more of a rush!

As Grace’s tongue moved sensuously up and down Hack’s cock, Anthony positioned himself behind her and began to fuck her doggie-style. After several minutes the brothers changed places and I got my first good look at Anthony’s cock. It looked kind of small relative to his massive body, but the way he fucked Grace, he sure knew how to use it. I was shocked by the look of ecstasy on her face as she gobbled his cock down, then sucked him like mad till he exploded inside her.

Seeing the happy threesome climbing out of the tub, I figured I better make my getaway. I sprinted back to the condo and assumed my position in my recliner. To my amazement, it was another half-hour before Grace came in, making me wonder what went on in the hot-tub building after I left!

I pretended I’d just woken up from a nap. “Hi, babe,” I said. “Did you have a nice time sunbathing?”

“You bet,” she said, making her way to the bathroom.

I sat there staring at the TV, but not seeing it. A part of me said I should confront Grace, but when she walked out of the bathroom in nothing but a towel and her sexy smile, I decided that could wait. We made love for two hours that afternoon!

When I plunged my cock in Grace, her pussy felt looser than I’d ever felt it, which, oddly, thrilled me. When we kissed and she slipped her tongue in my mouth, I could not help thinking about that tongue kissing and sucking the cocks of those two bruisers twice my size.

We had fun the remainder of the weekend before flying home Monday night. When we got back I suggested to Grace that we schedule our next trip sooner than usual — in six weeks, say, rather than the usual three or four months. She thought it was a great idea. So I went to the computer to make reservations. As usual I booked her to leave Wednesday, but while I told her I would be following on Saturday as usual, in fact I made my reservation for Thursday morning. I also booked a hotel room for Thursday and Friday nights. My curiosity was killing me. I had to see.

Basically, for two days I stalked my wife. Thursday afternoon I observed Hack and Anthony come to the condo about one in the afternoon and leave about quarter to five. That night a tall blond guy picked Grace up around eight. They went to dinner at a nice restaurant, went dancing until about one in the morning, then drove around the entertainment district. At one point, while I was driving behind them, I saw Grace’s head disappear into the blond’s lap and not come up for at least 20 minutes. Finally they went back to the condo and spent the night together.

Early Friday I spent at my hotel getting some rest, but by late afternoon I was back staking out the condo. It wasn’t until about half past nine that my wife emerged. Though it was dark, I could see that her short minidress barely covered her ass and also much cleavage was exposed. Her big tits bounced as she walked to her rental car in four-inch heels.

She drove to a place on the outskirts of town, which I found out later was a swingers’ club. When she came out, around two in the morning, she was staggering a bit, holding on to a really tall black guy who followed her back to the condo.

I decided tonight was the night my wife was going to be busted. I waited outside awhile to give them time to get started, then used my key to enter.

My wife’s moaning could be heard over the soul music coming from the stereo. They were so absorbed, they didn’t even notice when I entered the bedroom and stood at the foot of the bed gazing at Grace lying spread-eagle on her back while the tall guy pounded away at her. Even when they switched positions so the guy was on his back with my wife squatting over him humping him, they didn’t notice me.

It wasn’t till Grace, still riding the guy’s cock, turned facing away from him that she saw me. Her eyes widened with shock and she abruptly stopped moving. I smiled at her and with a wave of my hand motioned her to continue.

I stripped quickly and got on the bed. I stood in front of Grace with my cock in her face, pulling her head toward it. Her partner, unfazed by my sudden appearance, just kept on fucking her while she proceeded to blow me and resumed her bouncing on his cock. I came in her mouth within two minutes, then jumped off the bed, left the bedroom and fell asleep in my recliner. After two days of playing detective, I was exhausted!

The next morning, after the tall guy left (I never did find out his name), Grace came over to me, sat on the arm of the recliner and asked if I had any questions. Of course I had plenty, and she answered them all freely and frankly. I learned that she’d been having sex with other men for all the 12 years we’d had the time share. In that time she figured she’d fucked at least 40 guys. She also always made at least one trip to the swingers’ club before I arrived on Saturday.

She asked me if I could ever forgive her and if there was anything she could do. I smiled and said there was nothing to forgive her for, that she would always be my beautiful sexy wife. I said I did have one request. When she asked what, I said, “Can we both go to that swingers’ club tonight?” She threw her arms around me.

Now Grace and I always go to the swingers’ club at least once on every trip. As for what she does between Wednesday and Saturday, I leave that to her. It’s a major turn-on for me to imagine what she’s doing with her “friends,” and even more of a thrill to have her tell me all about it when I get there.