Stud in scuba class

My wife and I had always wanted to try scuba diving so we finally signed up for a group class offered at a local pool. Soon after the class started I noticed that another student was blatantly checking out my wife. He stared at her constantly and made no effort to hide it from her or from me. He was always smiling at her as well as making small talk whenever possible. Some men would have told him to stop flirting but he was much bigger and more muscular than I am and he could have easily kicked my ass. When we got to the part of the class where we actually got in the pool I noticed that he had a big bulge in his swim shorts and I'm sure she noticed, too. After class we hit the showers in the pool locker room and I could see why his bulge was so visible. He had a huge uncircumsized cock! He took long showers proudly displaying his monster. It was soft and still it was about 6" long and easily twice as thick as mine. The combination of his overt flirting and the thought of his cock made me feel angry, inadequate and horny all at the same time.

The next morning I jerked off thinking about his thick cock. I imagined myself watching him fuck my wife while she screamed with pleasure. I also imagined him pushing me to my knees and feeding me his big, thick cock. My wife and I never discussed it but I'm sure she fantasized about him as well.

Nothing exciting ever happened. He continued his flirting and staring all through each class and I made sure I was in the shower after each class so I could see that cock of his. I spent many an hour masturbating while thinking about him for months afterward