Day 5

I suppressed a groan as I woke up with morning wood, the past couple days had been boner free but obviously, that wasn't meant to last. I thought the best thing to do would be the same as last time, just lay back and think about anything else, so I thought I'd run back over the things from the last few days.

I had managed to get a few things crossed off my checklist. I'd had some more practice with the spear so I was a little better at it, I did also manage to carefully untangle the fishing line but decided it would be better to save it. I set up a decent sized windbreaker that enclosed out 'camp' it wasn't the fanciest thing ever but using palm leaves and some thick branches I'd managed to do a decent job.

Alice had finished getting as much oil as she could from the coconuts I'd brought and we managed to make two torches completely from coconuts, the husk was twisted into a short rope which was used as a wick, I then drilled out the mouth of a coconut and swapped the water for oil before putting the wick inside making a kind of coconut lantern.

We also had collected more seaweed and hung it up on a piece of paracord, and Alice had a great idea to boil seawater completely so that we could salt our meals.

We had run into a problem though, water, I was sure I knew the basics of making a purifier with rocks and sand and charcoal but we lacked a way to contain all of that, well other than the camp shower we had been using but we didn't really want to lose our best means of hygiene. I also wasn't sure if purifying seawater would be enough so that gave us two real options: one, go looking for a freshwater source or two, rig up some way of distilling seawater. The third option would be to collect rainwater, but there hadn't been any rain yet so that wasn't a viable option.

One other problem I had was that I was becoming increasingly sexually frustrated, I still didn't feel very safe on the island and didn't want to leave Alice on her own just so that I could jerk off. There were things we both needed privacy for and I didn't want to spend more time than necessary out of sight.

We also needed to make a large signal fire and an SOS sign too. We also hadn't done much exploring or headed further in land to see if there were any animals we might be able to eat.

My thought process was cut off by Alice mumbling, it also sounded like she might be waking up and I was still hard as a rock, my mind had been going over all of this but I was still aware of the lack of clothing we had on and the fact that Alice's chest was pressed against mine.

Again I pretended to sleep and felt Alice looking up to my face, she shifted a little and felt like she clung tighter to me, this had become a little bit of a routine but the past couple days I was awake when she'd cuddle closer with me. Today though I had a problem and after a moment of shifting she tensed up a little.

A minute passed of her holding completely still before she looked up at me again, she waited another minute then I heard an extremely quiet "Robin?"

I stayed pretending to sleep. Everything would probably get really awkward if I answered and I'd rather avoid that. Another minute passed, then I felt her shift again, she moved her arm around and then I felt her hand on my dick again.

She just held it, to begin with then she moved it so it was pointing up towards my stomach before letting go. I breathed an internal sigh of relief but soon that vanished as she moved again.

Now my cock was trapped between the two of us, I didn't know what was happening, then she moved again and I could feel the heat radiating from between her legs as she pressed herself into me before quietly moaning "Robin."

She stopped, and I felt her looking up at me, then she did it again. Soon, she was slowly dry humping me. It felt so wrong to be enjoying it as much as I was because she was my little sister after all. Her breathing became heavy and I could feel her hardened nipples against my chest.

She continued slowly, but I could feel more pressure being pushed against me, where once I could only feel the heat of her, now I could feel as my shorts grew damp and her lips spread slightly around my dick.

The friction between us caused my shorts to be pulled down slightly, just enough that the head of my dick was now poking out and as she pressed against me once more I felt as my dick made skin on skin contact with Alice. It was too much and my cock twitched almost painfully.

I shot load after load, but Alice continued her slow humping almost milking me and at the same time coating us both in my cum, then I felt her shudder a little and she tensed up before slumping against me.

After she'd caught her breath, she managed to climb out of the hammock without too much movement, and I almost flinched when I felt her finger run under the head of my cock which caused me to shoot one last string of cum.

She ran her finger on my stomach then I heard a low moan, before the sound of moving. Next, I felt some kind of cloth pressed against my stomach, it was warm and... wet? It seemed that whatever she was using she was cleaning up my mess and once done she quickly vanished.

Once she was gone, I opened my eyes and looked up at the tarp above. That just happened... I looked down at my crotch to see my spent dick looking up at me, and crooking my neck a little I could see quite a large wet patch around where my dick was.

I sighed it felt amazing, I hadn't cum like that in so long, it had to be the built-up frustration, that must have been the reason for Alice to do that too. She's probably not had the chance to... take care of herself either and she probably wasn't even thinking.

A thought crept into my mind though, it could have been because of who it was. Probably not completely because of that but because it was Alice, that could have factored in for how intense the orgasm was. Alice was my sister, yes, but I wasn't blind, she had a lightly athletic body, and at a guess large C or small D cup boobs. She had beautiful auburn hair and an adorably cute face with big green eyes. I shook my head, "No, it can't be because of that, it's definitely because of frustration for both of us," I quietly reasoned.

Okay so if anyone is following this story, I'm sorry for how long it took to get to any sex scenes, I could have probably tossed one in while on the yacht with one of the other girls.

I do want this to be a little slower and kind of 'natural' rather than just "These two got stranded and the first time they get they are going to jump each other's bones." Either way, I hope you liked this sex scene and it won't be the last.

I would be interested to hear what anyone's opinions for how he should proceed, I do have an idea but I am always happy to hear other thoughts.