This whole thing started because we needed firewood.

Our friend Justin, who has a cabin in the nearby mountains, had told Kim and me to let him know when we were running low because he had more wood than he could use. He’d also told us that he was planning on going up there on Saturday, so we decided to drive up to visit him and pick up a truckload of wood.

His cabin was nestled in a ravine on the side of a mountain overlooking a beautiful lake. He had lots of extra wood, so he and I cut and split most of the afternoon while Kim made dinner.

Kim and I have always been open about our fantasies and love to turn each other on with sexy stories. Most of them involve one of us fucking someone else while the other watches. Justin didn’t know it — at least I didn’t think he did — but he was the star of several of my wife’s hot stories. I knew she was pretty horny from the things she’d talked about on the drive to his cabin, but I had no clue that she was about to act out one of our stories.

After a good dinner and a few drinks, we retired to the living room to relax in front of the fireplace. Justin suggested we stay the night. I looked at Kim. With a sly smile, she said it was a great idea.

Since we were going to stay, I needed to go out, cover the load of wood, and tie the tarp down over it because it looked like it was going to snow. When I stood up, Justin announced he was going upstairs to take a shower. Kim said she’d put the rest of the food away.

It took me 20 minutes or so to get the wood covered and secured. The temperature was dropping, so I hurried back inside. I came in through the kitchen and didn’t see Kim. Then I heard muffled voices coming from upstairs, and the shower running. The voices were coming from Justin’s bedroom. My heart started racing, as one of my fantasies involved another guy with my wife in the shower. My jeans suddenly became too tight with the anticipation of what I hoped to discover.

Through the clear plastic shower curtain, I could see water cascading over their naked bodies. They were locked in a passionate kiss while he kneaded her firm breasts and she rubbed his butt.

I was mesmerized and could hardly believe what I was witnessing.

I suspected that Kim knew I’d figured out where they were and what was happening, because she turned toward the door. Justin had moved his head to her neck and was kissing and licking his way down her breasts. She leaned her head back to expose more of her throat to the caresses of his tongue as it slid down. His left hand moved all the way down her slick body to rest between her legs and lightly massage her pussy lips.

As his tongue found and licked an erect nipple, two fingers parted her pussy lips and gently slipped inside. I could hear her gasp with pleasure. She arched her back and spread her legs a little more, giving him better access as he started slowly pumping his fingers in and out, being sure to brush against her engorged clit in the process.

Kim started to sway in ecstasy, moaning with pleasure as Justin alternately sucked, licked, and nibbled the tips of her sensitive nipples. She suddenly cried out, pulled his head closer to her breast, and started grinding her crotch into his hand, caught in the spasm of an intense orgasm. Justin lightened up a little as she calmed down. She pulled his head to hers and kissed him deeply.

Kim lowered one hand and took hold of Justin’s cock. Then she knelt down so his swollen member was level with her mouth. She took most of it between her lips and started a slow pumping action while she gently massaged his balls and ass with soap. Kim was taking her time, slowly sliding his rock-hard shaft in and out of her mouth. She slyly looked through the curtain at me and started licking his cock like a lollipop, making sure I could see her tongue on every inch of his shaft.

I was trying to deal with my own bulge. I knew that she loved to watch me masturbate, so I pulled out my cock and ran my hand up and down it. While looking at me, she slid two fingers into her pussy and began finger-fucking herself, still maintaining a steady rhythm on Justin. Watching Kim finger herself very nearly caused me to lose control and shoot come all over the place, so I lightened up a little. She could see how excited I was getting, and I could hear that husky moan of hers that means she’s going to come any second. She started bucking on her fingers, thrusting harder and harder, and was losing her concentration on Justin’s cock.

Justin knew it too, and began thrusting a little harder himself. He was just about ready to explode in her mouth. They were both writhing in the shower — Justin pressed against the wall and Kim on her knees with his engorged cock in her mouth and her expert fingers working her pussy.

Suddenly Justin pulled my wife’s head away from his throbbing cock, turned her around, bent her over, and rammed his cock into her hot pussy. She had an orgasm immediately, and let the world know about it. As he was banging the hell out of her, his balls were slapping her so hard that I could hear them over the sound of the water. Justin couldn’t control himself any longer. He cried out and filled her snatch with his hot load. He was barely able to hold her up when her knees started to buckle — she was coming one last time. If I had been touching myself at all, I would have lost it right there.

Justin pulled the shower curtain back and stepped out, feigning surprise that I’d been there all along. I looked past him to see Kim beckoning me with her lust-filled eyes. Justin just looked at me and said, “Next!”