Margo and I have been married for a little over five years now.
As with most married couples our love life has cooled a bit from that sex-crazed first few years. I've been relying more and more on porn to satisfy my sexual urges. I've watched my tastes in porn migrate from the mundane guy on girl vanilla porn to more and more exotic genres. I've gotten into more things like glory holes and forced bi kind of stuff. Not that I have any desire to experiment with another man, but for some reason the idea of sucking a cock has become a more central part of my porn leanings. I have kept my porn and masturbation activities from Margo as I am not sure that she would understand nor accept them.
Lately I have had the feeling that maybe she is cheating on me. I don't have any direct evidence, but her demeanor in bed has become a little more aggressive and frequent. She would occasionally initiate sex, but lately it's like she can't get enough and she has jumped me more than ever.
It was her idea for us to take a vacation to an expensive luxury tropical island resort. She said that we needed to get away from it all and go where no one knew us and we could just cut loose. The resort had a small private island about 100 yards offshore that had a small beach hidden from view of the resort.
It was known for nude sunbathing. We decided to paddle out to check it out. When we got to the secluded beach there was only one person there, an attractive man lying naked on his stomach.
As we came into his view he looked up and greeted us with a smile. "I was wondering if I was going to be the only one here today. Welcome." He gave a look at my wife that sort of gave me the indication that they had met before. He nonchalantly rolled onto his side facing us to expose a cock that was bigger soft than mine is erect. He simply smiled at us and said "hi, I'm William. You do know it's rude to be clothed here when others are naked right?"
My wife just looked at me, smiled and took off her suit, and got down on the blanket next to him.
When she reached out and grabbed his cock I shouted "what are you doing??"
"Relax, we are on vacation and no one knows us here and William so nicely invited us. Why don't you join us?"
Next thing I know I am naked lying next to her watching while she strokes his growing cock. I was in shock when she gets between his legs and leans in to start licking the head of his cock
I can't believe what I am seeing. She has been faithful to me throughout our marriage and always a bit of a prude yet here she was sucking a complete stranger's cock right in front of me!
"Oh honey, this is amazing. Come here and feel how hard this thing is." She reached over and pulled me closer and placed my hand on his cock. I held it while she went back to sucking it.
I was in a trance as I started to jack him in rhythm to her head bobs. His cock really was amazing.
"You've got to taste this" as she pushed my head towards William's monster. The world was spinning as I felt like I was watching the three of us from above and not really part of what was happening on the blanket. I instinctively opened my mouth as she guided it past my lips. Now it was her turn to stroke it while she pushed my head deeper onto his shaft with her other hand.
I started to get into a rhythm bobbing up and down, trying to get a little further with each down stroke. Soon I could feel his cock getting even harder and then he moaned and grabbed the back of my head