[interesting]

"Mirror image, hey?" Barry said, casting a glance at Sarah.
"I'm game for anything," Sarah replied.
"We'll start smooth..."

From our side of the deck, Bonnie and myself were watching them decide what they wanted us to imitate. With all four us naked, there was a very clear inclination towards sexual dares, given our own level of comfort with each other. But Barry decided to start us off easy. He had Sarah sit in front of him, facing us, and he massaged her hair and head. It was really no challenge, so I had Bonnie sit the same way, as my fingers dove into her scalp. Both girls moaned lightly from the relaxation we were giving them.

"Easy enough," I replied.

The game would have made us stop and move on, but the girls insisted we keep at it, so we made it last another minute. Eventually, we stopped, although they would have wanted us to keep going. I turned to Bonnie and asked her what she wanted us to do. She remained on the spot, grabbing my hands and bringing them over the breasts, leaning me down.

"Massage me."

Her breasts were big, the biggest natural pair I had ever seen. The feel of her skin was exquisite, and feeling her hard nipples in the palms of my hands was sublime. Of course, Sarah grabbed Brian's hands and had him do the same. The sight of his hands covering her breasts made me shiver, and I redoubled my efforts on Bonnie. Her nipple sensitivity was, I suddenly remembered, quite strong, as she cast out a loud moan which echoed across the water. Sarah burst out laughing as Brian kept kneading her breasts, and Bonnie felt a little bad for her outburst. The massage didn't last long after that.

Everyone returned to their original position after that dare. Sarah looked at me, then pushed Barry down on the folding chair.

"You need to wait until we're done before imitating."

Bonnie and I agreed. Sarah leaned in, crawling over Barry, her body half-astride him, and she locked lips with him, pressing her chest against his. As I observed, two clear things happened in me : one, I became instantly hard at the sight and two, my heart began pounding like wild horses were running through it. It was almost tempted to call out the safe word, but I held my tongue, watching the sight as my friend and my lover rubbed against each other, sharing a kiss that seemed to last an eternity.

And then, it was over. Sarah pulled off of Brian, who didn't react quite immediately. In fact, he just laid there, dumbfounded. It was easy to see he was fully aroused now. Sarah pointed to Bonnie. She pushed me back onto the folding chair.

"Wait..." I tried to say.

She didn't wait. She wrapped one leg over mine as she pressed her naked body against mine. The feeling of her chest forced against half of mine made me shiver even more, but not as much as the kiss she gave me. My hands unconsciously wrapped against her body, reaching her buttocks, and I started caressing it. Her tongue buried itself in my mouth, and I could only imagine what Sarah was feeling. And that made me even hornier. The sensation was overwhelming in so many ways, I felt like I would faint.

And then, it was over too. Bonnie pulled away, and I knew exactly how Brian had felt a moment ago. I was out of breath, unable to reason, all my thinking power directed between my legs for a moment. I shook it off and returned to an upright position, but I was in heat. And it was our turn to play!

Luckily, Bonnie still had all her wits about her. I wanted to say something about the fact that I had told her to wait and she had ignored me, but I remembered that I had not used the safe word, nor did I really want to.

"Our boys are really riled up," Bonnie said.
"They are."
"What shall we do about it?"
"It's your turn. Show us."

Bonnie's hand caressed my inner thigh and she smiled at me. She grabbed my penis with one hand; before she started stroking it, she moved about and spread her legs, giving my own hand access to her inner legs. My hand wandered there and my fingers touched her opening. She started gently stroking me, so I tried to return the favor by sliding my fingers across her wet entrance. All the while, my eyes were focused on Sarah's who were focused on my hand between Bonnie's legs. I wanted her to make me come right there, so I wouldn't have to go further - at least, that's what I told myself consciously, trying to reason my way out of the game I had set up myself.

When Bonnie stopped, however, I knew it was another cop-out, and I needed to face the reality of who I was, and who I could be, in order to move on. So I pulled my own hand away, and watched Sarah reach for Brian's cock. Her hand wrapped around it, and I saw his fingers near her sex, where only I (and several other girls) had been since we had been together. I had seen several girls play with Sarah's pussy, but Brian's fingers were male, and it was not possible for me to imagine them differently. I wasn't as shocked as I could have been, and I was definitely turned on, even if that feeling still made me uneasy. Then, I started to focus on Sarah's face, and I saw the delight she got, not only from what he was doing to her, but from what she was doing to him - and to me. They ran the stunt for about as long as we had, and then pulled away.

Then, Sarah spoke up, speaking to the group but I knew I was the primary recipient of her speech.

"So... listen. Since I've been with Jim, I haven't been with any other man. I mean, no penis in vagina. It's always been the rule. And to be honest, I didn't - I don't need it. But, we're here, Brian and I have never been together in that way, and neither have Bonnie and Jim, so... so..."

She let the sentence linger. Then, she made Brian move about so he would be facing us. His shaft was erect in front of him. Sarah made him spread his legs slightly, then moved in front of him, intent on lowering herself on him. She looked up at me.

"If you're gonna say something about this, any of you, say it before I do it... not after, please."

That was my cue. This was the last opportunity to prevent my girlfriend from impaling herself on my friend; if I denied her, it meant that I denied myself. If I allowed her, it meant that I could do it too. She had, again, left it up to me, but it made sense now, and I didn't fault her for it. I had deprived her of this specific sexual activity since the beginning of our relationship, or rather, we had come up with that rule together. And then, I realized I was being selffish again. Bonnie was beside me, looking at them, watching her own boyfriend about to enter Sarah's sex. It wasn't just about me. It was about us.

I didn't look at Bonnie. I didn't say anything. I looked at Sarah's face and smiled.

She lowered herself onto Brian, spreading her pussy lips as she did, and his whole shaft disappeared inside her. I held my breath the whole time, even if it lasted only a second. She didn't move after that. She didn't sway. I could tell what this was doing to Brian, because I could see his face at that point. I knew that, when they had first met, he had fancied Sarah and it was only because Bonnie had imposed herself to him that it had not happened. It was happening now, and he reveled in it. And Sarah's gaze was priceless, allowing him to part her open, her mouth wide as she took in and enjoyed the sensation.

Then, she pointed to me. She was on him, true, but she wasn't doing him. She wouldn't. Not yet. Not until I showed her I could to the same to Bonnie. It could stop there. She would pull off, and that would be the end of it. But it couldn't be the end of it, because that was a wall, and I had not reached that wall. On the contrary, I had reached an epiphany. He was inside her, but she was looking at me.

I moved around on the chair, facing them, my legs slightly apart, my own rod sticking up. I looked at Bonnie and gave her a nod. I could see she was fascinated by the sight of her boyfriend inside my girlfriend. Barry had fucked other women beside her, I knew that much, but this being Sarah might make a difference. Still, she showed no hesitation as she got up, positiioned herself facing them and lowered herself on me. When her pussy reached my tip, I trembled. Her hand reached between her things, parting her lips, and I felt her sex wrap itself around mine, and it was divine. Sarah had seen me do other people, and she had enjoyed it. Now, she was also feeling it, Brian inside her, and it was as divine for her as it was for Bonnie.

Neither Barry or I could handle the restraint anymore. Our hands wrapped around our partner's waists, and the pumping movement up and down began. Brian was fucking Sarah. I was fucking Bonnie. We were swinging, fully, without restraint. The sight of Sarah bouncing up and down on Brian was as erotic as the feel of my own sex moving inside Bonnie. The girls reached forward like they would grab each other's hands, but they were too far by a foot. By now, I couldn't see Barry's face; I had to tilt my head sideways to see Sarah because Bonnie's frame was blocking my view partially.

Looking past Bonnie, I saw Brian lift Sarah up from the chair; she let out a wild moan as he did so, because it impaled her on him ever so much more. He was strong, because he was able, without pulling out, of getting down to his knees in front of the chair, covering the distance that was between the girls, allowing their hands to touch. Now on his knees, he kept pounding into Sarah whose gasps were the most powerful aphrodisiac. I wanted to do the same with Bonnie, but I didn't have Barry's strength. Bonnie stopped me in mid-thrust, pulling herself off and getting down on all fours, her face in Sarah's. As she moved, she grabbed my hand and placed me behind her. I immediately pushed back inside her and resumed my thrusts, lost in the moment and uncaring about the future.

Bonnie and Sarah kissed passionately while we made love to them, eager for release. Sarah knew me so well. She was always watching my face, looking for the subtle signs that betrayed my level of stimulation, even while Barry was having his way inside of her.

Bonnie was in throes of ecstasy. All the accumulated sexual tension was passing through us now, and she had wanted this ever since she had seen my picture, before we had even met. She was getting her wish, and I was getting so much more.

"Do it, love... Do it, Jim... Come on. Do it to her. Do it!"

It was uncommon for Sarah to goad me on like this, but it was what I needed. Not her blessing : her participation.

"So close..." I whispered.
"Do it," Bonnie managed to say. "Give it to me..."

There was no hesitation, no holding back. All of it, I spent inside Bonnie, eyes closed, indulging in all the pleasure of the orgasm riding me forward. And despite the release, I kept pumping inside Bonnie. I opened my eyes again, and Sarah was smiling, but that smile was twisted from Brian's own penetration of her, and I saw the orgasm building on her face, so I pounded harder into Bonnie, and I felt Bonnie still squirming under my continued push. Only Brian seemed not to follow our lead. He suddenly became vocal.

"Fuck... Sarah... I'm fucking you..."
"You are, Brian... in my pussy... fucking me..."

The almost pornographic words sounded completely fake, but it was what Brian needed to get over whatever last resistance remained in him.

"Fuck... Sarah... I'm cumming..."
"oh fuck! me too!"

The sounds of sex reverberated across the water, and the tempo died down. I saw Brian come to a stop, exhausted from the activity. I wasn't any better. All four of us remained there, still wrapped into each other, blown away by the experience. My eyes wandered to Sarah, and hers to mine. And that's when I truly understood why you had sex with other people, but you didn't go to bed with them.

Everyone pulled themselves apart, and there was long moment of silence. Sarah crawled to me and Bonnie crawled to Barry, as anticipated. Without a word, we all decided it was time to go rest. There were sitll two days to go on this vacation and, somehow, it seemed like the boat had been rocked enough for the night.

What none of us knew, at that time, was that our hosts had been awoken by our performance on their deck, and had silently watched us perform with each other.