Brother Sister First Time Mom and dad announced on our annual camping vacation they were renting a small travel trailer, the bad part it only slept two. That meant my sister and I would share a tent together. Not that would be a problem since we did get along nicely. The first night was quite uneventful, on the second night there seemed to be an unusual aura between.
Hot and humid all day and the tent held the heat with only a slight breeze making it through the mesh screen. Sometime in the middle of the night I awoke. Surprised finding myself close to my sister, not spooning but damn near and my hand was on her side. Very, very close to her tit. I have no idea how long I had been like this. I was tempted and never touching one before.
I quietly called her name once, then again in a slightly louder whisper. With no response I let my hand drift towards her front until it encased her breast. My dick had already started inflating and was at full staff. Slowly and gently I massaged her tit finding her nipple under the thin nightgown I played with it feeling it grow into a rigid nub.
I thought I heard her let out a slight sigh when she began to stir. I quickly rolled the other way grabbing my dick wanting to jerk off right there but thought better of it. What happened next was a shocker, our positions were reversed, her behind me with a hand on my belly. I awoke but pretended to be asleep when she mumbled my name three times before moving her head down. Through my pajamas and underwear she traced the outline of my hog.
Once or twice she attempted to pull the elastic band away but stopped short of putting her hand inside them. A few minutes after beginning it all came to an end when that feeling of euphoria began and inside my white briefs I expelled that wondrous fluid called sperm.
We both heard Mom and Dad outside fixing breakfast. It was a little uncomfortable for both of us. As usual we looked the other way while we dressed. Laying there we talked about what we might do for fun. It was me who tumbled landing half on her half off. Attempting to rise looking directly into her eyes I bent my head to hers and kissed her on the lips. The kiss turned passionate with our tongues swirling around the others until Mom was outside the tent door.
Scrambling to regain our composure she surely knew something was up but nothing like what had happened. Dad said the weather was going to turn sour with rain due at night and cool weather for the next few days but at least it would be sunny.
He was right, while we toasted marshmallows the rain started in light drizzle and the temperature had definitely dropped. Instructed if the tent leaked or we wanted comfort from any thunder or lightning to come knocking on the trailer door. I prepared myself by not wearing underwear. Peeking at her dressing into night clothes she as well shunned her panties. The rain turned steady with distance thunder. It was the temperature that was most dramatic.
It was turning quite chilly. With the hot weather we had opened our sleeping bags doubling them up for additional padding from the ground and only used sheets to cover us. Sally pulled the blanket out from the corner covering both of us. There was guilt to be shared when we began kissing. She was now facing the other way when she nudged up closer to me. In a hushed tone she complained to being cold.
I willing moved closer until we were spooning. My dick was already ridged and it nestled into the crack of her ass nicely. Only the thin fabric of our night clothes protected skin to skin contact. When I felt her ass initiating a movement I replicated while at the same time bringing my hand to her tits. For the next few minutes my hands groped, felt, and molested those majestic globes of healthy flesh with her nipples turning into hard nubs.
Being so close I kissed the back of her neck which only turned upped the heat further. Her ass wiggling around on my dick signaled her desires and I reciprocated accordingly by pulling her nightgown upwards bunching it up over her titties without any objections I had my own pajamas already down over my hips.
It was skin on skin and we both knew there would be no turning back. My relentless penis was on a mission riding up the crack of her ass leaking pre-cum onto her asshole making for effortless caressing of her brown rose bud.
The two of us were about to commit the unforgivable sin of incest and we made no attempt to prevent it. I thought she was backing out but after she rolled away onto her back she pulled my body down on top of hers kissing me this time with enthusiasm. I slipped between her open and willing legs. Repeated struggles to enter her unsullied cunt proved fruitless until she reached down between us positioning the engorged head of my dick at her entrance.
Clutching my dick liberated added pre-cum in conjunction with her discharge of girl syrup I was all set to enter the forbidden zone. Terrified and nervous not knowing what to expect I cautiously pushed into the Promised Land.
Only a fraction in I felt a strange tightness. I pulled back the small amount of dick that was inside her and pushed back in feeling it again. That was when she reached around to my ass and with both hands pulled me closer. This time I felt the tightness gave way like I broke a blockage.
Then I realized it was her hymen that I had shredded. Watching the tears flow down her cheeks made me think what an asshole I was committing such an act with my own sister. But when her hands kept pulling me down while her body was pushing upwards on me it urged me on.
I would like to think that it lasted longer but in reality I pumped my dick in and out of her cunt for a few minutes before the urge appeared. Resting and resuming several times only increased both my desire to cum and the amount that would be produced.
Just too much arousal between my sister was about to cause me to eject my waiting sperm. I pounded over and over into her cunt, her tears gone replaced with whimpering for more, her arms surround my body repeatedly pulling me into her virgin gap while her legs fluttered wildly in the air. The point of boiling came, my inner gut felt the phenomenon arising and quickly transferred into the length of my teen penis. I wanted to enjoy this in the fullest and slowed my thrusting to a crawl.
I felt the first gush traveling up my bloated tube. Keeping my dick stationary I enjoyed every throb, every pulse, and every expulsion of sperm into my sisters waiting pussy. While I lay still on top of my sister looking directly at her closed eyes and the smile on her lips I knew we had done the right thing. But when my dick inoculated her with that first of many torrents of seed her eyes flew open.
She knew what was happening. We both lay as one on the sleeping bag, the chilly air blowing in through the tents window did nothing to cool us. With tenderness I slide partially out of her and then back in several times.
On one of the withdrawals we both felt a stream of cum flow from her soiled cunt. She seemed to want more. My dick had softened but it seemed to come back to life. I gave her my tee shirt to clean herself. That was the first time I had seen her pussy or any pussy. There was cum seeping in a small thin line from her bloated pussy lips that were coated with frothy foam from the constant penetration after the first orgasm. Guilt set in that morning at breakfast for both of us. It only lasted until that afternoon while swimming when repeated the deed on the banks of the river, and again that night.
She told me the next week that our mother surmised something had happened when she approached her about the crispy stains on the sleeping bag. She was given the talk about the facts of life and how pregnancy can happen. That was when it sank in and I worried I had impregnated my sister.