Note: This story was dynamically reformatted for online reading convenience. My Wife Enjoys Sexual Flings... With My Wholehearted Support My wife (Karen) and I regularly camp at a little cove on a local river. One evening we invited her co-worker to join us for hamburgers, and to have a few drinks at our campsite. He was the same guy who had taken her for a boat ride the weekend before, and had fucked her during that ride. He didn't know that I knew, but my wife tells me everything. Ii was about 6 PM when he dropped by our campsite. I told him Karen sure loved his new boat and had enjoyed riding in it. I said, "Why don't you take her for another ride while I set up the grill and get a fire going. Take your time," I told them, as they pushed the boat off. "It will take a while to get things set up. I will wait for you to get back before I put the meat on," I told them. Karen had on a skimpy two-piece swimsuit. She looked fine, and I knew what was about to happen. The guy's wife had not been at home for the past week (she was visiting her sister in Arkansas). The two of them stayed gone about an hour. When they got back I had the fire going, so I put on the burgers and offered them a beer. As we drank and cooked I asked if they had enjoyed their ride. Karen smiled and said, "Yes." I told the guy, "I just don't understand why Karen likes for you to take her riding. It must be the new boat. Yea she likes something new. How do you like Karen's new swim suit," I asked. "Doesn't she look good in it?" "She sure does," he replied. I continued to talk with the guy, kind of playing him on, "Her suit has ties on the sides. It sure wouldn't take much to untie it. If just one side came untied, it would be gone before she knew what was happening. I started to get her to put on her cover-up before you took her for that ride. I sure would have hated for it to have come untied while you were gone." "She kept a towel over her," he said. The burgers were ready, so we ate. I brought out a bottle of wine. "Let's have some after dinner wine," I suggested. We drank our wine out of paper cups. As we drank, I asked Karen's co-worker if I could try his new boat. "Sure," he said, "take it for a spin." As I was leaving in his boat, Karen was walking into the water with her co-worker. Karen had picked out her swim suit for a very specific reason. It was white and unlined. When it got wet you could see through it. I didn't go far. I drifted the boat back down stream on the far side of the river. When I came around the bend what I saw was Karen on her knees between her co-worker's legs, with his dick in her mouth. I let the boat drift into the bank on the far side of the river, and watched. In time, Karen was bent over the front of our pontoon boat, with him behind her, fucking her doggie-style. When he pulled out of her I cranked the boat and started back to the cove. They heard me, and started getting their clothes back on. When I pulled in, Karen was working on one of her ties. I got out of his boat and told him, "I sure like your boat." I looked at Karen and told her, "I knew when you got that swim suit you were going to have trouble keeping it on with them ties like they are." "Yeah," she said, "the damn thing keeps coming untied." I turned to him and said, "It's a good thing she caught it when she did, or you would have gotten an eye full." That's when he said he'd better get back before it got too dark. After he left I told Karen what I had done... that I had watched the whole thing from the far side of the river. She smiled and told me he had given her a good screwing again. "Good for you," I told her.