Warm Campfires, Moonlit Nights, and Animal Instinct

A handful of hours later, you're scribbling away in the rulebook while Tyler nurses the start of a fire, the girls off in the woods searching for roasting sticks. Between words, you idly turn the pages, looking back at all the changes you made and the events that transpired because of them.

Tyler's warning had proven true; Robin had spent an uncharacteristically unusual amount of time swimming near you and your other male cousin. Granted, more him than you, but plenty of times you felt the vague touch of someone's leg below your waist. It coincided too well with the times Robin was treading water next to you for it to be randomly passing fish. Further confirming that fact was that she wouldn't make eye contact with you shortly after it happened.

You even asked her once if she was alright, but the girl just blushed. "I can relate so much to you right now" was all she'd said on the matter.

When the swimming came to a close and the sun was nearly fully behind the horizon, just like before Susan demanded that you and Tyler exit the water first, the girls staring at your naked asses as you emerged. Once dry and adorning what was essentially family-appropriate lingerie, Susan and Robin exited the lake and did the same, disappearing into their tent shortly afterwards. You inquired about it after it became apparent they weren't leaving anytime soon and Tyler assured you that it was normal.

When they did, Robin was blushing profusely, a crimson flush spread across her whole skin. Even Susan seemed chirpier than before, leaving you with little doubt as to what they'd been doing.

With everyone feeling hungry, you all fell into a comfortable system and the girls rushed off into the woods while you gathered the cold meats and buns from the cooler your cousins had previously prepared. Waiting for the girls to return, you decided to fumble with the rulebook, jolting down a quick idea that was half-driven by the curious need to test its limits and the raging hormones coursing through you.

The book had long been discarded and Tyler had a roaring fire by the time Robin and Susan came back with four large sticks. The branches quickly sharpened, the four of you spent the remaining daylight idly chatting, catching up on each other's lives as you roasted burgers, hot dogs, and marshmallows - the setting sun a perfect tapestry behind you all.

Soon enough the moon was high in the sky and the four of you were gathered around the burning flames, Susan sitting closest to you. You stared as the light danced across her naked skin, the urge to touch her strong within you. Whatever blush and embarrassment the girl felt, if any, was lost in the night.

"So, what do you think of this spot?" she eventually asks, breaking the silence that had befallen between you two. Next to her, Robin and Tyler were also making small talk, the two having moved closer to one another as the night progressed.

"It's pretty great!" You reply truthfully, an answer she evidently hadn't been expecting by the way she smiles. "I'm not a big camper but I've been enjoying myself. The spot's nice, quiet..." Isolated, you finish mentally.

Susan nods along as you describe the watering hole. "Isn't it? Ty and I were so proud when we found it. We were canoeing at the time but we made a point to remember where it is and we hiked up the very next day. Once we saw it was perfect to camp, well, we wasted little time setting ourselves up."

"And your mom and Uncle Joey are fine with you and Tyler just running off into the woods?"

She gives you a side look, smirking. "Ty and I are adults, Michael. Besides, mom and dad always seem thrilled to have us out of the cottage."

"I just meant, in regards to the whole..." and you gesture to her navel, waving your hands in silence.

"Oh." The girl blushes crimson, catching your meaning. "I mean, I can control myself. I have ways to settle my womanly urges."

"You mean the dildos?"

At the mention of her secret toy, her blush turns scarlet, spreading to her chest. "You heard that?"

"Not specifically what was going on in the tent" you admit, hesitating only slightly, "but I did overhear you and Robin talking earlier. How's she holding up, by the way?"

"Ahh..." Susan takes a moment to breath deeply, the blush fading as she regains her composure. You do note however that she's slowly becoming more and more loose-lipped, a small haze forming in her eyes. Similarly, you feel a flush pass through you, the heat of the fire warming you. "She's doing fine, all things considered. She was thankful for the.... um, dildo, earlier."

You nod, acknowledging. "Yeah, it sounds like a good way to settle the need without, well, you know."

"Yeah... Actually, speaking of which..." and without another word, your cousin tries to get up to her feet. However, she quickly trips on her feet, stumbling back and forcing you to break her fall as you pull her onto your lap. Settling herself, she lets out a small giggle. "Gosh, why am I feeling so drunk?"

"Maybe its the outdoors?" you ponder with a knowing smirk, confident that the young girl can't notice your grin.

You feel her shaking her head. "No, that only makes me feel fertile. And dick crazed." she adds with another giggle.

Your next comment comes out as soon as you finish thinking it, its brashness surprising you. "Must be hard then, being a girl alone out in the woods with her brother."

She just nods against you, unperturbed by what you said. "Yeaaah... It takes everything to stop myself from pouncing him. I know he's my brother and all, but my body doesn't care. It just wants a baby, you know? Especially since he's also fighting the need to grope me; that alone tells me he's attracted to me in return. Just like how you are right now." She takes a deep breath, a shiver passing through her. "Fuck, I can feel your dick pressing against me..." She half-whispers while closing her eyes, biting her lip in a silent moan. "Why am I even telling you all this?"

You ignore her question, you yourself lost in the heat of the body pressed against you and the burning blaze of the dancing fire. You hands carelessly roam her body, intent on becoming familiar with every inch of her all while staying clear of the gap between her legs. The limbs in question have also spread wider than they normally would, the girl obviously **** to the point where she no longer cares if she's shameless exposing herself. She'd even casually pressed her ass against your crotch, your hardness pinned between the two of you.

You can feel everything having its affect on you; the warmth of the campfire, the moonlight reflecting off Susan's naked skin, the isolation of the forest... A wave of dizziness passes through your system and you become acutely aware of the near-naked girl sitting on your lap, your hands on her breasts. The world seems to spin and you're unable to stop yourself from asking, "Does the dildo truly help?"

At your question, the girl sighs deeply, resting even more into your lap. "Barely. I just want a real cock so badly!"

"Do you want to see mine?"

Instantly, Susan shoots up, soberness returning to her in an instant. Still, not all playfulness has left her because she quickly chides you while punching your shoulder. "Don't tease me like that Michael!" She also shifts her position so that she's looking up at you, turning her back to the fire.

"Who says I'm teasing?" you challenge, staring directly at her. You watch as she loudly swallows, gears turning in her head.

Feeling drunk, you kiss her.

The action takes her by surprise, Susan pulling back ever so slightly before quickly melting into the kiss, her body pressing itself tightly against yours. Her arms wrap themselves around your neck and her weigh pulls you down, making you crash upon the girl closer to the campfire than you'd anticipated. You don't care however, your entire focus being on Susan and the way her lips feel against yours. Everything seems to be spinning, the world around you blurring. You catch a glimpse of Robin, sprawled on top of Tyler, kissing him passionately. Your attention is quickly brought back to Susan as she brings your hands to her tits, this time your palms grabbing them fully and she moans beneath you.

"I need you so bad!" she gasps as she pulls you closer, your groins pressed together. You feel the heat radiating from her core, your cock harder than its ever been.

"How does it feel?" you inquire between kisses.

"Like a deep yearning," she sighs breathlessly. "A yearning that's begging you to fill the emptiness inside me. Not just with your cock, but with your seed, your baby, your cum. It's what I'm meant to do. Please Michael, I need you inside me!"

You're not sure you fully understand, nor do you try too. Your mind a haze, what does make sense to you is the fact that you're bucking against a near-naked female. Gone is the fire, the open sky, and the two others sharing your campsite. That only thing that makes sense is that there's a girl beneath you, begging for your baby, and everything in your body is screaming at you to give it to her.

She doesn't even try to stop you as you remove her bottoms, her legs instead spreading widely, giving you all the room you need. Your cock is quickly exposed, the organ harder than its ever been, and any thought telling you otherwise is shushed as your body, guided by pure instinct, slides itself into your cousin. The two of you gasp in uniformed pleasure, your shafted enveloped by her wetness. You thrust slow but quickly shift, gaining speed as you bury as much as yourself into Susan as possible, the girl responding by raising her hips to match yours, her body clutching you in **** need.

You've had sex before, but this is nothing like it. In fact, there's nothing humane about your coupling; your humanity having left you long ago, leaving nothing but the pure animalistic need to mate. Hearing similar noises coming from across the campsite, you glance up, watching as Robin bucks wildly on top of Tyler, thrusting herself against him as though fucking him was the only thing that mattered. It was the only thing that mattered. All night, your instincts have been drawing you closer to the girls, your body screaming at you to touch them, grope them, feel them between your fingers; just like how theirs have been begging them for something hard inside them, wanting nothing more than that pulsing sensation of a womb being filled, of a seed catching, and of a baby growing - nature at work, as intended.

Your climax is quick and sudden, but not unwelcomed. In fact, the pleasure is second to the sheer satisfaction coursing through you regarding a successful mating. Beneath you, Susan feels you empty your essence into her, her body shaking in orgasm as it responds to what it had partially been asking for ever since she'd left civilization. The two of you aren't alone, as both Robin and Tyler's mews of pleasure soon join, the four of you lost in the throws of powerful climaxes.

As the draining sensation fades, you rest silently on top of the naked girl, the pair of you short of breath; the only sound around being the cackling of the burning fire, the distant echoes of nature's denizens, and the waves near-silent as they crash onto the shore. Still hard and buried deep within your cousin, the two of you nuzzle against one another, the world seemingly spinning around you.

All passing of time lost, the moment is eventually broken by Tyler, who somehow manages to make it onto his feet. With heavy footfalls, he mumbles something about needing to tend to the fire, and Robin collapses onto her back, the girl a dark silhouette alone on the wooden stump.

You pull out of your cousin, the girl simply cooing softly at the lost of sensation within her, and stumble up to your feet, your stance wobbly. You don't even feel guilty, all inhibitions seemingly gone from your system. Everything seems to spin as you fumble your way towards Robin, collapsing next to her in a drunken stupor.

Your sister's lost in a fit of laughter, that same lustful haze clear and evident in her eyes. "My body feels so alive!" she exclaims to you amidst her giggles. Her words cause your eyes to roam across her naked form, sweat gleaming in the moonlight, and you can't help but succumb to the urges you gave yourself, fingers finding breasts and pussy, all semblance of control long gone.

"I can't control myself," you admit, voicing your thoughts.

"Me neither." Robin replies, spreading herself wider for your wandering fingers. "I'm meant to have children Michael. I know I can feel Tyler's cum deep within me but-" She gasps as a finger finds her clit, "-my body's asking for a baby. I need your help making a baby."

You don't even hesitate. Somehow still hard, as though nature itself was giving you the vitality you needed, you climb on top of your sister and slide yourself inside her. Just like with Susan, the fucking's raw, animalistic, nothing more than a surrender to the most basic human desire to reproduce. Somewhere behind you, Tyler has mounted Susan from behind, the four of you rutting around the burning embers of the campfire, the naked moonlight shining bright in the sky.

You don't know when but at some point you black out, the rest of the night fading away into a whirling haze of smoke, passion, and sex.

Across the campsite lies a single leather tome, the content scribbled on its pages interwoven ever-so-tightly with reality around you, making it so.

• New Rule: The combination of nature, the vast starry night sky, and the warmth of a campfire has a curious effect on humans. Extended and continued exposure makes them enter a drunken-like state that lowers inhibitions, increases sexual vitality, and amplifies basic animal instincts, allowing them to fuck well into the night.