When the decision was made that we would have an experience with another man, we were both excited by the idea. We had put some thought and planning into it and decided to give it a try. Naturally, my wife would make most of the decisions. I was mainly focused on just seeing it actually happen. It was something I have thought about for a long time. My wife, Maria confided in me that she had met a man that she thought would be perfect and so the evening was arranged. We met at the lounge of a downtown hotel where no one would know us. When her "date" arrived I was surprised that he was a tall black guy. I was also excited. After a bit, we made our way to the room and things began to happen fairly quickly. They began kissing and caressing almost immediately so I sat in a chair and watched things unfold. Tremendous excitement was all I felt at the moment; no jealously. We had arranged that if either of us wanted to stop, then it would, and although the sight of them in a passionate embraced almost triggered that within me, I resisted and let them continue. Soon Maria's dress was off and so was his shirt and slacks. He began feeling her breasts and kissing her cleavage over the top of her bra. Maria looked over at me as he was doing this, almost as if she was expecting me to signal an end to the activity, but I just smiled. She returned to kissing him as her hands moved over his smooth, fit body. Maria removed her bra and panties and lay on the bed while he pulled off his boxers. He had a nicely shaped cock which was now fully erect. I guessed it was about 8" in length using my own 6 as a point of comparison. He joined her on the bed where I though they would engage in some oral foreplay but to my surprise, Maria pulled him between her legs and then he was inside her. It all happened so quickly, they were fucking right there in front of me. My own cock was also hard as steel as I watched them not six feet away. I was so turned on by it that I was afraid I was going to cum so I stopped rubbing my cock. The whole encounter took about fifteen minutes during which time, my wife came at least three times before he pulled out and shot his load onto her stomach. That's when my excitement turned to feelings of regret. I had just watched my wife of nearly twenty years get fucked by another man, a black, well-endowed man no less, and there I sat with a fading hardon to show for it. Talk about a roller coaster of emotions! Our relationship has never quite been the same since then and so I wonder if it was really worth it to live out that fantasy. Too late now I guess.