Friday (Day 2)
Nick and I woke up and made a simple breakfast of muffins and juice and ice coffee. We hung around this camp spot till about Noon. We did get in the water for a nude swim (nothing too exciting) and played cards and talked about the coming day.  I confessed I was nervous.
We finally broke camp and got back on the lake again, figuring it would be about time to go pick up Sean. I was wearing only silk panties and a shear tank top. The undies were almost see thru and the tank top displayed my "girls" to their best with nipples protruding out.
The weather was finally warming up, getting up to 90 degrees, which was great news. While we waited, we snuck over to the Marina to replenish the ice and take advantage of the flush toilets. I put a coverup over my tee and panties to go out in public. Nick warned me that if I raised my arms just a little or bent over, the cover raised up and my panties would be visible and from the front, my pussy lips were very obvious as was my ass crack from the back. Weird, that I found that kind of exciting and actually bent over in the store a couple of times just for the fun of it.
We got cell service near the Marina so when the time came, we got the text from Sean that he was close so we headed over to the dock to pick him up. We met him at the pier and tied up and then got out to say hello.  It was a wonderful meeting. He gave Nick a manly hug and then took me in his arms and gave me crushing "friendly" hug with a sweet kiss on the lips and a whispered "Why did we wait so long to do this? I have fantasied about being with you for so long".
We got his stuff loaded in the boat, Nick sat in the driver's chair, Sean stood next to him and I sat in the seat across from Nick. As we pulled away from the pier at wake-less speed, conversation was pleasant about how was his family, if he was still in touch with Bethany and how she was doing? He had questions for Nick about his work and even some sports that was pretty much "guy talk". We were still in the wake-less zone so I excused myself and walked towards the bow where cushions formed into a small bed about 18 inches below the top of the bow.
Then I removed my coverup looking forward and away from the boys. When I had it off, I heard a comment and turned around for full effect so Sean could see my nipples poking through my tee and my shear panties showing off my shaved pussy lips. It was making me wet standing in front of him with his eyes roaming over my body so close that he could reach out and touch me. I asked him if he liked what he saw as I cupped my breasts with each hand teasing my nipples and then slid them down to my hips, and he answered emphatically "Oh yes for sure". Then I sat down on the forward cushions. I could feel both of their eyes on me so as I sat on the cushion and reclined back, I spread my legs a few inches and pulled my shirt up over my panties so everything I had would be visible to the boys.
Once out of the wake-less zone, Sean sat in the passenger seat next to Nick as Nick increased speed, and the engine noise and wind put an end to the conversation.
I laid there enjoying the sun and warmth as we traveled through the Bay and up the canyon. After about 45 minutes or so, we made a turn up to one of the canyons we knew be be a good place to float and eventually found a perfect spot to drop the anchor. We then fixed a beverage to refresh and relax. We talked as I prepared a quick lunch to eat and once that was done and cleaned up, I suggested we take a dip to cool off and the boys both agreed.
Nick dove in, Sean quickly followed him and I was left on the back platform with two sets of eyes going up and down my body and feeling very sexy and desired.  I had already committed to myself to act like a total slut so I just pulled my tee up and off and stood for a few seconds with nothing on except my panties to cover my body before I dove into the water.
When I came up, Sean swam over to me and told me how beautiful and sexy I looked. I told him I had noticed he'd kept himself fit as well. We swam and floated in the water for a bit as he took the opportunity to grope my breasts under the water, then we decided to get back in the boat.
Nick climbed in, and then Sean followed with me last in the boat. The boys quickly dried off and sat back in the driver's chair and the one next to it and watched me climb onto the swim platform, and use a towel to dry the water off me, then brush my hair and tie it up with an elastic.
Once dried off and without putting my tee back on, I got in the boat and reclined in the back cushion area under the Bimini for shade. This was the signal I had given Sean that I would be ready to start "playtime". I was reclining on the boat cushions with my back leaning against the back cushions.  Sean looked at me with his eyes roving my body, naked except for my wet panties and he looked over at Nick and asked "May I?". Nick said to be his guest so Sean joined me, reclining next to me.
He looked me in the eyes as he placed his hand on my knee and then began to rub up and down my leg. He looked at Nick one more time, smiled and then brought his hand up my leg until he was touching the bottom of my panties. It had been a very long time since he touched me there, and feeling his hand on my pussy again immediately made me wet. I spread my legs a bit to allow better access and then he started gliding his fingers over my pussy underneath my panties.
This was the moment i had imagined a thousand times over the last few weeks. I could hardly breath as I watched his fingers glide over my labia and then look up to see Nick leaning closer to watch his wife being touched intimately.
Sean then brought his hand up to cup my breasts one at a time and play with my nipples (I had shared with him the way I liked to be touched on our phone call.) It felt wonderful and I knew I was losing control of myself. Sean then leaned over to kiss me and I let him, allowing his tongue to enter my mouth and dance with my tongue as we kissed for what seemed like a long time.
Then he lowered his head and took my closest nipple into his mouth and began to nibble and suck it as his hand went down and inside my panties this time, to touch me there again gliding up and down my inner labia. Then when his fingers were moistened, he put one at the opening to my cunt and started to slide it inside me. I parted my legs further to give him better access and soon he had two fingers inside playing there. Through all of this I just watched Nick watching me. It just made me all the more aroused having my husband be my audience.
I am extremely submissive when I become aroused and Sean is very much an alpha male to start with so I felt totally submissive to his control.
Then I remembered my promise to Nick and realized this was going to be the last opportunity for me to keep my promise. I asked Sean to stop for just a second and got up and kneeled in front of where Nick was sitting. Looking him in the eyes, I rubbed my hand over his suit and felt his erect cock. I undid the tie at the top of his trunks and began to pull them off of him. He assisted me and in a few seconds he was naked with his cock poking forward out from his body.  I took his cock in my hand and began to stroke it and then lowered my mouth on to it and began to suck it trying to be very careful to keep him on the edge, but not to cum.
I stopped after a few minutes and looked up at him and our eyes met and I said, "I promised you I would give you one last chance to end this before it starts. Now that you've had a taste of what to expect, if you have any reservations whatsoever, tell me now and I will not go any further".
Nick looked down at me and said, he wanted to keep going. He said he wanted to watch Sean fuck me. I told Nick this was the last chance for Nick to stop me. I was getting very aroused and out of control and at the point of no return and if he let me keep going, I was going to proceed and do whatever I wanted to do with or without his permission. I asked him if he understood what I was saying, and he then nodded. I told him I had to hear him say it.
I said "Tell me what you want Sean to do to me."
He then spoke and said "I want to watch him fuck you".
I said "Then finish stripping me" and I turned around to face Sean as Nick pulled my panties down and off and now I was just a couple of feet away and naked in front of this "other man".
I kneeled down one more time and sucked Nick's cock for a couple more minutes  and then told Nick how much I loved him and returned to lay down by Sean who then embraced me and kissed me deeply as his hand roamed over my body and his fingers invaded my cunt again.
After a few minutes of kissing and touching he moved down between my legs, he spread them further apart and he began to expertly lick and suck my pussy, using his tongue on my clit and his fingers to play with my opening, down to and even into the entrance to my ass, and then inside my cunt again.