As I lay there, sun creeping in the porthole, my husband's brother curled up beside me, I heard a faint knock at the door. After a moment, it opened, and Mark stuck his head in. And then the rest of him. Naked again.

"Hey Holly. Is this weird, or what?"

"It's weird, but you don't need to stand there like that. You're my husband. Come on in."

"Nah, I can't do that. That's my brother in there, remember."

"Yeah, but it's not like you don't know. He's asleep. Come tell me about Erin."

"You want to know?"

"Uh huh. That's half of the attraction. But I could ask Erin instead, if you want."

"Oh. Yeah, well, that might be best, actually."

"Kay. Everything alright?"

"Oh, yeah, fine. Great. It's just weird talking about it."

"Okay. Well, why did you come knocking at our door then, hubby?"

"I didn't come looking for you, actually."

"Sleeping beauty here?"

"Just remember Holly, I'm older than him." That was Matt.

"Only by a few minutes Matt. Listen, we need to go get those supplies, and we need to get going."

"Oh, for Christ's sake Mark, what's the rush? There's no need to hurry off early in the morning."

"Matt, look at the clock."

"Oh, shit. Look Holly, it's nearly twelve."

"Yeah, so what?"

Mark turned then, smiled, and opened his mouth. "Listen brother. Just because you got some A-grade ass last night, there's no reason to sleep in half the day. Send that trollop packing, and let's go. We'll get back after dark at this rate."

"Hey!" I called out then. "Watch who you call a trollop. I happen to know what you were doing last night. Don't I Matt?"

"You do."

"You do? How?"

"We watched."

"You didn't. Matt, tell me you didn't."

"Sorry little bro. We did. Had to check you were looking after my Erin."

"Shit, that's not right."

"Mark, you were doing just fine."

"Holly, you just shouldn't know that."

"Look Matt, he's blushing now."

"Look brother, you can return the favour another time. Now get out of here, and make me some coffee. Then we can go."

"I'm flabbergasted."

"Yeah Mark." Me.

"What she said." Matt.

Mark turned and walked without another word, though I saw the corners of his mouth curl up, and knew he wasn't really upset.

I looked over at Matt, to find him staring at my no longer covered breasts.

"Holly, I don't know if there are any rules for this, or anything, but gotta tell you, you are beautiful. Also fucking sexy."

"You too Matt, and I think we'll have to write the rules as we go. For now though, a temporary rule. I'm not dealing with that."

"With what?"

"That thing."

"Oh, why not?"

"Trouble, with my husband."

"For fucking his brother?"

"No, for making him late. Get out."

"I see. One night of ultimate fantasy, and that's it?"

"That wasn't my ultimate fantasy."

"Don't change the subject, Holly."

"Very nice though."

"Yeah?"

"Yes Matt, it was."

"We should do it again then."

"Yes."

"Ah."

"Not now, you dirty bastard!"

"Bugger."

"You're as bad as your brother."

With that, I jumped clear of the bed, and ran, giggling, out of the cabin. Just down the hallway, I literally banged straight into Erin, and then caught her in a bear hug. "Erin, save me!"

"What from?"

"Your husband."

"Oh, that. No."

"No?"

"Nope. Firstly, you didn't save me from yours." She stopped and kissed me then. "Secondly, I have it on good authority that you were spying on me."

"Oh, Erin, you're not cross are you?"

"Nah. I expected it."

"You did?"

"Yep. Not you, necessarily, but I knew my husband would want to watch. And I like it, I think."

"It was my idea, Erin."

"Oh. You know Holly, for the shy one, you are just such a slut. Gimme another kiss."

"Yeah, Matt said that too, last night."

"What, asked you for a kiss?"

"Nah, said I was a slut."

"He's right. Make him happy?"

"I think so. I hope so. I know I did."

"Good. Talk later. Breakfast awaits. At least one naked man wants to serve it."

"Oh, goody."

"Yep."

The men took off in the rubber dinghy just after lunch, leaving us with the mess to clean up. It was strange to see them both dressed. Suddenly, nakedness seemed normal.

After we cleaned up the dishes, and bitched about men some more, Erin and I got a couple of cold drinks, headed back outside, and lay down on the warm wooden deck, stomachs full, content with the world.

We lay in silence for a while, taking sips from out drinks from time to time. After about twenty minutes, I propped myself up on one elbow, and turned to Erin.

"Hey, can I ask you something?"

"Of course, Hol. Anything."

"About last night?"

"Uh huh. Go for it."

"It's about Matt."

"That's not surprising. What?"

"He has a ... umm... a technique, I guess."

"Yes Holly. Bit late to be shy now."

"No, it's just... hard to explain. His penis..."

"Cock."

"Cock?"

"A penis is for urination. If it was hard, it was a cock."

"Cock. Okay. Is that a rule?"

"Well, only a personal one."

"Kay. Well, his cock. I like that. It's at a different angle, or something."

"Different to what?"

"To Mark of course, Erin. What do you think I'm talking about?"

"I didn't have a clue. Umm... different which way?"

"Well, it's... God, how to explain."

"I can wait."

"Yeah. It touches me differently. Like it's in a different place."

"You want to show me?"

"Show you?"

"Yeah, use your fingers, show me the difference."

"I couldn't do that!"

"Why ever not, Holly?"

"Well, that's.... Oh, hell..."

"Listen, it was just an idea."

"No, it's alright. I mean... Oh, just look, Erin."

"Oh, I am. I am."

"Yeah. It's like this. You sure this is alright?"

"Yeah, of course. Go on."

"Okay. Mark is just a little bit smaller, I think, but he gets inside me just here, like this." I was more than a little embarrassed at this point, sitting there, knees apart, impaling myself with a finger. I felt slippery too though. Hot.

"Okay. And Matt?"

"More like this. Higher, kind of. Nearer my clit. It works better, anyway." I blushed.

"Oh, I see. I didn't notice, to tell the truth. I'll report back later."

"Yeah?"

"Yeah, no sweat. Hey, Holly?"

"Uh huh."

"You've still got your finger in there."

"Oh!"

"No, don't take it out. Not yet. Tell me what he was like, some more."

I sat there, with my finger between my legs, and told her the whole story. By the time I finished, she was looking a little flushed herself, and I did something I've never, ever done. I left my finger where it was, but reached over and pulled Erin's face towards me, and started kissing her. At first, our kisses were gentle, friendly sisterly kisses, and then, something happened, and the next thing I knew, our tongues were entwined, and she slid closer, pushing her body up to mine, our breasts pressed together, her legs apart, and over mine.

As our mouths continued to indicate their interest in the relationship, Erin's hand slowly crept down off my shoulder, across the side of my breast, and down my torso, creating a delightful feeling as she felt her way down my ribs.

I think I realised quickly what she was going to do, and I didn't make any attempt to stop her. She reached down and lifted my hand from between my legs, and pulled it towards herself, and then back down, until my fingertips were touching the soft blonde mound of hair she had, and then down some more, until I was gently reaching inside her. She was even wetter than I was, and offered no resistance to my questing fingers, indeed shuffling a little closer to make it easier.

My mind was whirling now, thinking of the implications, but I couldn't say anything, because that would have required me to disengage our tongues, and I wasn't prepared to do that.

I reached deeper inside her now, and then pulled my fingers back a little, and felt her labia. So different from mine, the sensation was softer somehow, and I could feel her body moving slowly in response to my caresses. Knowing, from experience with myself, that she needed more than this now, I moved my hand up a little, until I encountered a familiar little hard knob. As I touched her clit with my soaked fingers, she started a little, before her body relaxed, and let me continue my caresses.

Just as I felt I was getting used to the feeling, and the rhythm Erin needed, I felt her hand returning to the spot from which she had removed mine. My eyes flew open, and stared right at hers, before I relaxed, putting my fears aside, and pressed myself into her caress.

Somehow, we managed to coordinate our efforts then, and as I stroked her clitoris, she stroked mine, our fingers moving in unison, our lips playing a harmony above.

We took our time, strumming each other like familiar instruments, bending and stroking each others body ceaselessly, varying the pace together, not a single word being spoken.

As our breathing became ragged, and our movements more abrupt, we stroked more precisely, more speedily, and more desperately. Then, completely without warning, we were both pushed over the edge, stumbling into an orchestrated orgasm, a mutual release I would never have expected, and we both shuddered together, muscle spasms causing or bodies to jerk, the feedback causing another and another tremor.

Normally, Once I come, I just want Mark to leave me alone, but when I'm alone, and masturbate, I can keep rubbing gently, and stay just on the edge. This was just like that. Erin kept on stroking me, and I her, knowing how a woman feels, what a woman wants, better than a man could, and within a very short time, we both came again, harder in my case, longer, my muscles tight already.

Our mouths separated finally, our fingers stopped stroking, and we just sat, breathing heavily, sweat pouring from both of us, our heads touching, our breasts still pressed together.

Eventually, we looked up at each other.

"Oh God Holly, sorry."

"No Erin, it was my fault."

"No, I wanted it to happen. I took the opportunity. But I shouldn't have. I'm sorry."

"No need Erin. It was wonderful."

"It was, wasn't it?"

"Yep. Couple of things though. Ummm... any idea what the boys would think about that?"

"Ah, yeah, I do actually."

"Yeah? How come?"

"Well, Matt has told me before. He'd love to see me with another woman. I just never found the right woman. Until now."

"Oh. But what about Mark?"

"This is probably crossing a line, but I know about that too. Matt told me they had talked about it. He feels the same."

"Oh. Thanks for telling me. I wish someone would fucking tell me something first, just for a change."

"Yeah, I know. I'll try not to let it happen again. Holly?"

"Uh huh."

"Holly, have you ever done that before?"

"With a girl? Uh uh. Not me Erin. I like penises."

"Cocks."

"Yeah, cocks. I've never even wanted to do that. I kind of wondered about it, but never wanted to... God that was good though."

"Yeah. Umm... listen, I've done that a bit before."

"Erin, you never told me that."

"No, I know I haven't. It was a while back, long before I met Matt, and I thought I had grown out of it."

"I don't think you have."

"No, it seems not."

"This is becoming a hell of a week, Erin."

I was woken gently from my sleep when the twins stumbled into the cabin. Erin and I had crawled in there earlier, to escape the sun, and promptly fallen asleep on the covers.

As I sat up and went to say something, Matt's hand clamped over my mouth, and he motioned me to remain silent. I nodded at him, and he lifted me up, tossed me over his should in a fireman's hold, and headed toward the hallway. I looked back and noticed my husband's gorgeous ass, as he removed his clothes, and crept in behind Erin.

Once we got down the hallway to Matt's cabin, he carefully negotiated the doorway with his delicate load, closed the door behind him, and unceremoniously dumped me on the bed.

"You girls looked so sweet lying there together, Holly. The sun get a bit much?"

"It was for me, Matt. Erin can handle it a lot better than me."

"Yeah, I believe it. Listen, I wanted to get you out of there without waking her up, because I told Mark how much she likes to be woken with a tongue, and he was keen to try it."

"A tongue? That sounds nice."

"Yeah? Pity you are already awake, huh?"

"Mmm. I could, however, pretend to be asleep, if you want."

"Not now. Maybe in the morning?"

"Mmmm."

"I'll take that as an affirmative response."

"Good."

"Anyway, dinner? A drink?"

"Not unless you do, Matt. I'd rather you took those shorts off. They don't look very comfortable."

"I'm not hungry."

"Oh."

"Not for food, anyway."

"Actually, I could do with a nibble, so lose the shorts, and come and stand here."

"You have a way with words."

"Not just words. Come on."

He walked towards me, his erection bouncing in the air, and then stood, still and silent, in front of me. I was sitting on the bed, and if I scrunched down a little, I could take him in my mouth while he stood there. So I did. I licked all over his penis (alright, cock) first, making it jump with each contact, and then took the length of it inside, beckoning it with my tongue, drawing it in. Then I began working with it, sucking it deep, sliding in and out, caressing it with my tongue.

This is something I have a fair bit of experience with, and I soon fell into a rhythm that worked for him, sliding him in and out in time with the thrusting of his hips. I was thankful that he didn't grab the back of my head, which I hate, and wondered for a moment whether Mark had been telling stories. I made a mental note to ask him later on.

Matt couldn't hold out too long, and when I very, very gently touched his cock with my teeth, while my hands were caressing his testicles, it was too much for him.

He tried to pull out as he realised he was going to come, but I wanted to check up on something. I knew exactly what Mark tasted like. I neither liked nor disliked the taste, but was happy to swallow it. Swallowing come has an amazing effect on a man, for some strange reason. They seem to think it's an indication of greater love, so I don't mind doing it.

As I held Matt to me, I could feel his cock start to jerk, and a groan escaped his throat. Suddenly my mouth was full of hot semen, and I was trying desperately to swallow it all. It definitely tasted similar to Mark's but not quite the same. Happy to have completed that experiment, I wiped Matt's cock efficiently with my lips, and was rewarded with another jump as his muscled contracted a last time. Eventually I removed my mouth from his swollen, but no longer hard cock, and looked up. He smiled for a while, and then spoke.

"You realise action like that deserves retaliation, don't you Holly?"

"Hoped it would."

"My tongue is registered as a dangerous weapon."

"You got a certificate?"

"Lie back woman, and stop talking."

"Uh huh."

I lay back on the bed, as commanded, and Matt knelt on the floor in front of me. He pulled my legs towards himself then, my thighs getting close to his mouth. Then he leaned slightly forward, his breath hot on my swollen vagina, his tongue just barely touching my labia, and he started to caress me.

Have you ever seen those old guys who go out to the street and wash their cars every weekend? You know, the ones who haven't actually used their car at all? They get out a small cloth, and they wipe every single molecule of the car, before putting it backing the garage for another week.

Matt was like that with me. Everything anywhere near my clitoris was gently pushed, moulded, pulsed, prodded and sucked by his mouth, his tongue performing miracles on a regular basis, his lips making love to every inch of my skin. I just lay back and enjoyed it, moaning gently from time to time as he pampered me.

After he had been paying me attention for about a million years, he started to caress some areas with his fingers, scraping his fingernails across my ass cheeks and down my legs, his fingertips exploring my ticklish navel in a way I can't even describe.

Slowly, as he continued the great job with his mouth, his fingers returned to my ass, and gently explored around my anus, experimentally prodding, without force, at the puckered hole there. I wasn't used to this. Mark didn't like anything to do with asses, and he would never touch me there, let alone torment me delightfully like this.

Sensing that I wasn't resisting at all, Matt continued his ministrations with his mouth, and slowly inserted just the very tip of his finger into my anus, wiggling delicately. I couldn't take it, and just as he got his finger where he wanted it, I surprised myself by orgasming. That wasn't normal for me at all. I need some serious attention to my clitoris normally, and he hadn't even touched that. I wondered whether this aberration was due to the afternoon's activities, or Matt's skilled manipulation of my body. In the end, I didn't care.

He didn't let go at all while I orgasmed around his mouth, and tensed on his trapped finger. I could feel, rather than hear, a chuckle in his throat as he realised what he had done to me, and then he concentrated on doing it again, to my delight. Finished now with tormenting me near and around my clitoris, he came closer, circling my clit with his tongue, scraping it oh so lightly over the surface wetly, and I started to thrust beneath him, mashing his mouth into my cunt, pulling his head in with my hands, just as I didn't want him to do. My thrusts were affecting the captured finger as well, pressing it in and out, stretching the skin delightfully, stroking the nerves, doing horrendous things to my blood pressure.

As quickly as the first time, I exploded beneath him, my legs clamping his head tightly, unable to speak but willing him to stop moving, to let me come in peace. He did too, staying as motionless as my gyrations would allow, until I started to calm down.

He did the nicest thing then, and slowly withdrew. He didn't just lift his head and smile at me, he left politely, stroking and licking his way back, slowly removing his finger from behind, until I was quiet, settled, and relaxed.

I rolled over on my side without a word, and closed my eyes. He grabbed the blanket, and crept in behind me, spooning, with his semi-tumescent penis comfortable behind my ass.

He lifted his head then, brought it close to my ear, and whispered, quietly but clearly.

"Just in case you've forgotten, I promised to wake you up in the morning. Have a good sleep in the meantime. Sweet dreams Holly."

I mumbled something incoherent in return, and dropped off to sleep, visions of Matt's cock, Mark's ass, and Erin's breasts sailing through my dreams.