Showering With The Neighbor

My wife and I are liveaboards on a houseboat. It's nice in that it is quiet and isolated, except for another man who is a liveaboard and lives right on the other side of the dock, about 10 feet from our back door. My wife enjoys walking around naked at night even though I mentioned that our neighbor might see her, she kept doing it.

The neighbor is a few years younger than us, much taller than me, and not bad looking. My wife told me that he had come up to her and said that he just had a larger shower installed on his boat, and that it was so big that all three of us - him, my wife, and me - could shower together. I joked that we should take him up on it, and my wife shocked me by saying, "OK, let's go."

We went over and my wife told him that we'd like to try out his shower. He asked if she meant all three of us, and she said that she did. He and my wife quickly shed their clothes. He was well-endowed and my wife looked at his penis and then covertly looked at me and feigned a shocked look. I was slower to undress as I've always been a little embarrassed about my small penis, but I was relieved that neither of them said anything when I got naked.

All three of us got in the shower. It was pretty big for a boat shower. At first my wife covered her breasts and was a little embarrassed but he broke the ice by saying that he's seen her hot body lots of times. My wife uncovered and asked if someone would soap her back and he was quick to volunteer. Both of us were sticking straight up and she said, "Looks like you boys are excited." He said he was horny as hell and asked if he could rub his dick on her to help relieve himself. She consented and then he asked, "OK with you buddy?" Not wanting to look like a jerk, I said "Sure."

He grabbed her from behind and began rubbing. I was surprised to see her start to wriggle around to stimulate him more. Then I saw him thrust his dick between her legs. I couldn't believe what I was seeing - he was fucking her and she was really getting into it, breathing hard, moving back and forth, and moaning. I felt jealous and a little panicked because we aren't ready for kids and always use a condom, but she was letting him do it bareback. They started fucking like animals and both came wildly -- him once and her maybe twice. After, she leaned against the wall looking exhausted and satisfied. He looked over at me, smiled, and said, "We're cool, right?" I felt like a fool, but I said, "Oh, yeah. Glad you had fun."

I was going crazy with lust and jealousy. Cum was dripping down her legs. He had pumped her full. I said, "OK, my turn." The ultimate humiliation came when she responded, "I'm exhausted, honey. Maybe tomorrow. Just finish yourself off." So I stood their and jacked off while they ignored me and smiled at each other. It was unbelievable to think that our neighbor filled my wife with his cum while my cum was going down the drain.

Next night my wife and I did finally fuck. I had never been so turned on.