In the month that followed our first 'practice session', Kevin and I continued to visit the island frequently. In the time we didn't spend on the island, we were both on the internet looking for new positions, tips and techniques that we could try out on our next session. Kevin had grown particularly fond of hummers which are blowjobs where I hum as I suck him. At first, I had tried to hum a tune but that had proven too funny and we had to stop as we both started giggling. When I tried again I just made a deep resonant noise in the back of my throat interspersed with some deep moans which made him cum pretty quickly and forcefully into my mouth.

Luckily, with practice, I had trained him to reliably cum three times in a session and occasionally he could do four. One day when we spent the whole day on the island, he came for me three times in our first session, another time in a quickie after lunch and twice more on during a very long session in the afternoon.

We had been planning on going to the island this afternoon and staying the night camping together. And while we were still doing that, the night of passion and experimentation had been slightly ruined when my sister Ciara overheard and decided it sounded fun. So she had invited the twins Sean and Aidan who were our second cousins. So while our night of lust had been derailed we had managed to smuggle quite a few bottles of alcohol onto the island so we were going to have quite a fun night camping with the family.

We set off about five pm, making it to the island in half an hour. We had been scouring the beach for driftwood for days beforehand so we had quite a good pile going which the boys immediately started building into a fire. Unfortunately, none of them really knew what they were doing and it took them another half hour to get the fire going. Ciara and I started by getting all the food and the final few bottles of drink out of the boat. Then Ciara ran back to the boat to get the tents. 

Ciara had a petite athletic fame and her hair was dyed a vivid red. She liked dark lipstick that stood out from her pale face and occasionally wore very vivid makeup around her eyes often putting small blue dots around them or purple swishes at the edges. She was wearing a lightweight white summer dress with flowers blossoming over it. The dress was tight across her stomach and then flowed outwards from the hips stopping halfway down her thighs showing off her toned legs. I had always been so jealous of her body, not that I was too unhappy with mine but hers was so tight and pert.

I realised what I was doing and stopped gazing at my sister's body and went to help get the tents. We’d just got the tents up as the boys finished with the fire. We gathered around it, sitting on some rocks that Sean had dragged over from near the cave. 

"What have we got to eat I'm starving?" Sean piped up.

"You're always starving, fatty," Aidan joked. 

We all laughed at Aidan insulting Sean's looks because they looked identical, and neither was fat. They were both tall and lean with spiky brown hair that they insisted they styled differently but which seemed exactly the same to anyone else. They even dressed similarly although Sean wore a blue checked flannel shirt while Aidan’s was red. In fact, the only difference between them was that Sean's nose was crooked because Aidan had broken it when they were sparing during kickboxing. I remembered that they had discussed Sean breaking Aidan's nose so that they looked the same again. We were never sure how much they were joking.

"All the food’s in the cooler," I pointed "and the drink is in the one over there." I nodded my head towards the other cooler.

"To the drink!" Kevin shouted pulling the lid off and grabbing beers for everyone as Sean dived into the food cooler pulling out the chicken sandwiches and handing them around. The sandwiches were made with thick slices of fresh bread that Aunt Erin had made earlier. They were delicious and went very well with the cold beer.

"Chuck me another beer will you Katie," Aidan asked.

"Alcoholic." Sean grinned, getting revenge for earlier.

"Oh, and I suppose you'll be stopping at the one beer will you?" Aidan shot back.

"One beer, yes." Sean smiled reaching behind him and pulling out a bottle of rum and some Coke and pouring himself some into a glass. It looked suspiciously like the quantities of coke and rum were about half and half.

"Oh pour me one too," Kevin asked eyeing up Sean's drink and finishing off his beer.

"Sure Kev," Sean said with an evil glint in his eye. This time he seemed to pour about a shot of coke into a glass of rum which Kevin being the unobservant idiot he is didn't notice. Until he took his first large gulp causing his eyes to bulge and making him cough violently. We fell about laughing as Kevin grinned sheepishly and poured half his cup into another and topped them both up with coke.

I reached out to grab one. "Hell no get your own," he said, grabbing both cups with a grin. "Just don't let that dick head pour it." He gestured rudely towards Sean who was smiling so smugly that the corners of his mouth were practically touching his ears.

As the fire grew larger with more and more of the driftwood catching, the sun started dropping below the horizon. the orange glow of the sun providing the perfect background to the cosy campfire on the rugged little beach. Once we had finished off the food we lay back digesting and drinking more until the idea of drinking games seemed like a good idea. We played ‘ring of fire’ and ‘the gauntlet’. The sound of shouting and raucous laughter filled the little bay.

We lay back against the rocks chilling and chatting while drinking at a more sedate pace. The drinking had lowered my inhibitions. As we rowed over I had discounted the possibility of having sex tonight. But I was getting more horny and more drunk. I kept stealing glances at Kevin who, judging by his glances at me was feeling the same.

"Hey guys I'm going to go sleep in the cave, so you can keep going but I need to sleep," I slurred slightly as I hauled myself unsteadily to my feet.

"I might join you," Kevin said, probably incredibly obviously. Luckily though, everyone else was too pissed to notice anything was amiss.

We stumbled up the beach together towards the cave before flopping down onto the blankets inside. We started making out sloppily. Our hands groping all over each others body. We started clumsily pulling off clothes. As the lust rose in my body I started thinking more clearly. Not clearly enough to think that maybe having sex with my cousin with my sister and two more cousins only a few hundred metres away might be a bad idea but clearly enough to start thinking about the awful things I wanted to do to my cousin.

God, I want his cock, I want him inside me. I want his cum inside me. I want him so fucking much. How is he taking so long to get undressed... oh wait I still have my skirt on.

I pulled my skirt off as he finished pulling off his jeans and boxers together. I drank in his toned body, admiring it. His cock was still mostly soft but even hanging there limply it still drove me wild with lust. I knelt over him and lifted his penis up into my mouth. I pulled back the foreskin and flicked my tongue out to taste the tip of his penis. 

I wrapped my hand round the floppy shaft and started rubbing as I licked the end. I ran my hands up his body feeling the now familiar contours of his stomach and chest. He started to run his hands through my long silky hair holding it back so it didn't get in the way of my mouth.

His cock was still flaccid so I slid it all into my mouth and started making a low resonant groan while my hands gently caressed his balls. I kept this going for quite a while but it wasn't working.

Am I not good enough? Did Kevin not find me sexy anymore?

"Katie, I'm so sorry I think I've drunk too much I'm so horny but I just can't get hard." 

"Oh." I was gutted. Luckily... I think.....I wasn't as horny now, sucking on a flaccid penis with no result for ages tends to do that. "Shall we go back to the others?" I asked.

"Yeah, sorry. " He smiled sheepishly. "I'll make it up to you, I promise."

"You'd better!" I said slapping his bare ass as I got up and started pulling on my clothes.

We wandered slowly back towards the campfire. As we got close I could see something strange. It looked like they were wrestling. As we got even closer to the firelight, the scene unfolded in the flickering light. Ciara was bent over, her petite lithe frame was being pounded by Aidan from behind while her dark red lips were clamped around Sean's cock. The firelight danced over their naked bodies making it look orange and black. The deep shadows accenting all the curves and making the movements look slightly jerky.

We stopped, watching the debauched scene in front of us. I had always been jealous of Ciara's nubile frame but this was the first time I had really realised that I was really attracted to her, I was mesmerized by the sway of her breasts as they bounced with each of Aidan's thrusts. The boys were also looking spectacular in the firelight. They were both toned and muscular, their abdomens tensed as they both pushed their hips back and forth.

"FUUUUUCCKKK," Aidan groaned giving one final thrust forward burying himself deep into my sister and gripping her hips tightly holding himself in and grunting in pleasure. The sight of his twin cumming seemed to set Sean off causing him to pull out of Ciara's mouth and shooting strings of cum over her delicate face. "OHH God," the boys groaned in unison. Aidan pulled back strings of cum hanging from the end of his cock and leading back into my sisters tight little pussy.

I looked over at Kevin. "Oh, so now you have a boner?" I raised my eyebrows looking at the obvious bulge in his jeans. 

He smiled sheepishly "Sorry, but come on, that was fucking hot!" I smiled at that. I found that I agreed with him, watching my petite little sister getting pounded by two cocks was fucking hot, too fucking hot. 

"Yeah, it was." I grinned back.

That was when Ciara turned her cum covered face towards us "Shit! It's errr...I .... This isnt....." she stammered, struggling to explain away why she was naked on her hands and knees covered in cum with Aidan and Sean's toned bodies at either end of her. Ciara's reaction made the boys look too, Sean's first reaction was to cover his cock that was slowly going limp while Aidan scooted back away from Ciara's ass.

I leaned over to Kevin with an evil grin "Do we let them sweat a bit?" I said in a low voice.

He chuckled "Nah, I'm horny," he replied into my ear.

I burst out laughing which only got louder as Ciara, Sean and Aidan looked at the pair of us in confusion. 

"Oh stop worrying you three, we aren't going to tell anyone. We don't mind that you were having sex." I paused. "As long as you’re not finished and we can join in."

The three naked teens couldn't have looked more shocked if I had sprouted wings and flown back home to tell on them. 

"You... You want to join in?" Aidan asked.

"Yeah, well me and Kevin have been having sex together for a month or so, you know just to practice for Uni. Well it would probably be good to have experience with some other people as well and from what we saw you looked pretty good."

"So that's why you two have been coming over to the island so much recently!" Ciara exclaimed.

"Yeah," Kevin said sheepishly.

"So is this the first time you guys have done it?" I asked, curious.

"Sort of," Ciara answered. "We have been masturbating together for a while now, well I joined them about a year ago. I walked in on them and, well, one thing led to another."
I was struggling to focus on what Ciara was saying as I watched some of the cum dripping slowly down her face. 

"This was the first time we actually had sex," Ciara continued, "I think we had been drinking a bit too much." It was her turn to smile sheepishly now. 

"Ok... well the first thing we need to do is to get these two hard again, just follow my lead." 

I knelt down in front of Aidan and pushed him back onto the blanket while gesturing Ciara to do the same to Sean.

"What about Kevin?" Ciara asked.

"Kevin can watch, as that's what makes him hard these days" I stuck my tongue out at Kevin.

"Oh no," Kevin said in mock horror. "I have to watch two sexy girls give blowjobs, how will I ever cope?" 

As he was saying this he was pulling off his clothes and sitting down on a log to watch. I realised I was still dressed and stripped off all my clothes in seconds. "That was quick," Aidan said his eyes locked on my body.

"Yeah I'm horny, now let's get you hard." I say as I wrap a hand around his shaft which had stayed semi-hard as he listened to the sisters discussing sex. I straddled his legs and popped the tip into my mouth as I ran my hands up is body exploring the new and exciting figure. His body was toned and hard from years of martial arts, running and weight training, my fingers traced between the muscles caressing his curves.

Unlike with Kevin, I started getting an immediate response as his shaft started to harden. I cupped my hands around his balls gently playing with them as I flicked the tip of his penis with my tongue tasting the remains of his cum and a different taste which I was sure was my sister. 

Fuck I'm tasting my sisters pussy of my cousin's cock, that's so fucking wrong, why do I love it soooo much

As he got harder I started to slide him further into me taking more and more of his cock into my mouth. I looked up and saw Ciara was working away on Sean, she had one hand on his balls and the other was massaging her own perky breasts as she moaned onto Sean's cock.

Aidan's cock was now rock hard again and the taste of his cum and Ciara's pussy had been replaced by the milder taste of precum. I watched as Ciara's lips pulled slowly back up Sean's shaft showing that it was also stiff. 

"So, now we have three hard cocks to play with I think Ciara here needs to cum. You two boys got to cum on her but my poor little sister has yet to be satisfied."

"Oh god yes please," Ciara exclaimed, rising from Sean's shaft. "I don't think I have ever been this horny, god that feels weird to say to you Katie."
"Oh it feels weird to say you’re horny but the dribble of Aidan's cum running down your leg is totally normal, right?"

"It feels so naughty I..."

"OH MY GOD LETS FUCK ALREADY!!!!!! I can't take you two talking like this, it's too fucking hot!" Kevin burst out.

"I think we may have been ignoring him for too long." Ciara giggled.

"Well, why don't you have him, he is very good at making me cum. I want to have a go at the position you were trying with the boys because that looked amazing."

Ciara opened her mouth to reply but Kevin was already there taking her hand and laying her down. He couldn't keep his eyes off her tight little body. I was about to watch them but Aidan and Sean were by me in an instant, their erect shafts standing tall. Now they were both standing in front of me I saw that they were not identical, Aidan's cock was slightly more girthy than Sean's but Sean's was about an inch longer. With a look and a nod at each other, they split up. This time Sean was going to fuck with Aidan getting sucked.

They pulled me into position on my hands and knees, my pert ass sticking up in the air and then Sean slid slowly into me. I cannot describe how wet and excited I was at this point but the pleasure of him inserting his long shaft into me nearly made me cum right away. He slid deep into me until I could feel him shoved right up in my tummy pressing against my cervix. His hands on my hips pulling me onto him, pressing himself onto my cervix making me quiver and moan. 

Then Aidan's cock was in front of my face. There was a bead of precum that had been squeezed out and was sitting on the tip and for a second time, I took him in my mouth. This time was different, he was in control. I was scared at first when he started thrusting back an forth but he was slow and gentle just like Kevin had been when we had tried face fucking a few weeks ago. Sean was also being gentle pulling out until his tip was only just resting in my pussy and then sliding slowly but firmly back in...