The Flap or Risy Behavior 101
Taboo/incest Story

The Flap or Risy Behavior 101

by Delirious_brain 19 min read 4.8 (29,900 views)
brother sister cum lotion tan toast caught flap
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Strange feature of family house spurs sibling shenanigans.

This is a work of fiction. All persons are 18 or older.

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Excerpts from the diary of Lori Martin.

9/15 Sun

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Holy shit. I'm so excited. This is the juiciest confession I've ever made by far -- the hottest thing that has ever happened to me. Just how it happened is a bit of a long story, so bear with me.

I never mentioned this before: Our house has a unique feature we call the Flap. The Flap is a secret entrance -- an entrance that was installed by the previous owner before Mom and Dad bought the house, before Ken and I were born. It's a custom made doggy door in Ken's room, sized for a large dog. It opens to the side of the house, onto a walkway between the kitchen door and the rear of the house.

It's always been bolted shut, but Ken, you know him by now, he secretly opened it up when we were little. I eventually discovered the source of Ken's talent for disappearing and then we both used it, keeping it secret from everyone else. It used to be the perfect size for us to jump in and out of to elude and deceive our friends, and Mom and Dad.

Not that we used it together. We did no such thing. He may be my brother, but Ken and I aren't friends, you know that. We're almost strangers. We never hang out together and we have no shared friends. We dislike each other. We barely tolerate one another when forced to be in the same room. It's his fault. He's never said a kind word to me, so I can't be expected to treat him any differently. Sure, he's only a year older but he came first, it's his job to be decent to me in the first place. But I digress.

The Flap fell into disuse when we became teens, or so I thought, ever since we grew too big to get through it quickly. The top of the flap is waist-high now when viewed from Ken's room, and reaches a little over the top of my head when viewed from outside. A small bookcase stands in front of it these days.

Andrea and Mary came over to hang out around the pool with me today. We went out back to find Ken in the pool, swimming laps. Andrea and Mary shared knowing smiles as they checked out his body while we arranged our lounge chairs and towels.

Fucking annoying. But I guess I couldn't really blame them. Ken's good looking, just like me. We share the same dark brown hair and eyes, and light skin. We're also both small boned, slightly shorter than average, on the thin side, and we both keep our bodies in good shape. But still, fucking annoying. They're my friends, not his.

Ken got out of the pool, grabbed his towel and started drying off. Mary and Andrea said their smiling hellos and Ken responded back, cool as could be. Awkward for me, I guess not for them. The jerk should have left already.

I think I mentioned before that Andrea's one of the prettiest girls in school. She has a build like mine but has light brown hair, and she's an incorrigible flirt. Mary has naturally blonde hair and she's a bit shorter and slightly too skinny, but guys like her and her cute face just fine. She's the shiest of the three of us, though she has her moments.

Ken turned to go into the house and would have left then, but Andrea just had to stop him and ask him to put tanning lotion on her back. She just turned right over onto her stomach and held the lotion out to him. Ken took it, sat on the edge of her lounge chair and rubbed it all over her. And then, looking straight at me, she reaches back and tugs on the tie of her bikini top, releasing it.

"I don't want tan lines back there," she said, with that giggle I usually liked but suddenly didn't. I sat there watching my brother rub the lotion into her upper back thoroughly, from the top of her shoulders, over her shoulder blades and down to her waist. They looked good together -- two beautiful creatures, male and female -- which only ticked me off more. He finished her off with a "There you go," and I thought we were finally free of him.

No such luck. Mary finds her courage and chirps, "My turn," gets into the same position as Andrea and releases the tie of her bikini top. Ken put lotion on her pale, skinny body too, of course.

But is that the end of it? No. Andrea wasn't done. "Go ahead and do the same for Lori. You don't want your sister to burn her back, do you?" she said. They were both smiling, looking at me and Ken.

Somehow I would have felt guilty refusing, as if I would have lost some unspoken argument between me and my friends, so I turned onto my stomach and slowly pulled the tie of my bikini top loose, imitating what my friends did. I made sure to turn my head away from my friends so they couldn't see my face and I couldn't see theirs.

Ken sat on my lounge chair and started rubbing lotion onto my back. I was surprised at how good his hands felt on my skin. I found myself wishing my friends weren't there. He seemed on the verge of massaging me, but stopped just short of that. Once my shoulders were done he started in on my shoulder blades, covering my skin thoroughly and pressing his thumbs between my shoulder blades and spine, like a massage. His hands travelled closer to my sides and I thrilled as I felt his fingertips against the sides of my tits. He didn't linger but he didn't shy away either. He was all business, but it felt good. His hands continued rubbing me down to my waist and a little below, all the way to the top hem of my hip hugger bikini bottom. Just before he finished I felt him give me a little squeeze around the waist, and then his touch was gone.

Andrea decided to embarrass me then, saying "Don't his hands feel good, Lori? If I were you I'd make Ken do that every day."

"He wishes," I said to her. "Don't go getting ideas, perv," I said to Ken.

"Don't worry, Quasimodo," he said, finally getting up and leaving through the sliding glass door. He didn't bother to finish drying off, he just held his towel against his wet chest and dripped all the way in.

I closed my eyes and enjoyed the peace that followed. The California sun and the occasional cool breeze felt relaxing. I relived the feeling of Ken's hands in the privacy of my thoughts. After some time I was brought back to reality by Mary, who wanted something cold to drink.

I retied my top and told them I'd be back with sodas. Instead of using the sliding glass door I turned left and walked around the perimeter of the house toward the kitchen door.

After rounding the corner and disappearing from my friends' sight I stopped abruptly in front of the Flap, frozen in disbelief, trying to comprehend what I was seeing. The Flap was gone, leaving the hole to Ken's room open. Ken stood naked in his room, yet right in front of me, less than a foot away, vigorously pumping his erect cock with his hand. He was obviously getting off on looking at my friends through his rear facing window. Somehow he must have also been getting a thrill out of jacking off through the hole, because the hole and the window were perpendicular to each other and he stood facing me and the hole, not the window.

I realized that Ken had no way of knowing he was caught, no way of knowing I was there, as long as I remained completely quiet. To him it must have looked like I entered the house through the sliding glass door. He stood too close to the hole to see through it. I relaxed a bit and moved as close to him as I could to watch him masturbate.

I watched Ken pumping his cock directly in front of me, less than a foot from my face. It was thick and darker than the pale skin of his stomach and strong thighs. So were his balls, which were completely shaved. Sparse dark curls of hair ran in a line down the center of his flat stomach, from his navel to his thick pubic hair, which was cut short. The tip of his cock, along with a third of the shaft, was more pink than the rest. No foreskin -- he was circumcised. The smooth, mushroom-shaped head looked so big, I wondered if he would knot me like a dog if he were inside my pussy.

I felt my pussy flush and slipped a hand inside my bikini bottoms to rub myself, staring at the delicious sight in front of me. I decided I wanted to see him cum. I was nervous, shaking and more turned on than I had ever been. It took some effort to remain completely silent while mauling my excited pussy but I managed it.

I noticed his cock starting to throb and was in the middle of silently mouthing, "Wow," when a stream of cum shot directly into my mouth and over my lower lip and chin. I flinched, turning my head to the right, and felt the next two spurts hit my left cheek and ear. Instinctively, I turned my head the other way and felt two more spurts hit my face, across my nose, mouth and right cheek. I felt a light sprinkle of cum across my body as I watched him shake his cock free of the cum that still clung to him.

I felt like someone dumped a bucket of cold water on me. I did not think that through. I have no idea how I managed to stay quiet through my shock, but thankfully I did. My only concern at this point was getting into the bathroom without anyone seeing me covered in cum. I tiptoed to the kitchen door and carefully opened it, entering and closing it behind me as quietly as possible. Next, I snuck down the hallway, praying that I wouldn't see my brother's bedroom door open before I got to the bathroom door at the hallway's end. A sense of relief came over me as I made it into the bathroom and closed the door behind me.

I looked at myself in the mirror. Boy, was I a mess! The cum ranged from just under my eyes down to my chin. I didn't think boys came that much! My body had little flecks of cum on it too, from clavicle to tummy. And my hair. I looked at the line of cum from my lips to the bottom of my chin where it dripped off and noticed the salty taste in my mouth. Ken came in my mouth! I swallowed his cum without even thinking about it! There was so much going on, I didn't remember doing it. I wondered how much of the taste in my mouth was his cum and how much was my imagination. Watching myself in the bathroom mirror, I licked the cum from my upper lip and tasted it. Yes, it was salty, creamy and sexy. Ken's cum tasted delicious to me. The taste of Ken. The taste of sex. The taste of my desire for him and his cock.

I was soaking wet again. I slid my bikini bottoms down my legs and jammed a finger in my pussy, rubbing myself with my whole hand while pinching a nipple with the other. I watched my tongue lick all around my lips again, watched a bit of my brother's white goo stick to my pink tongue, tasted the salty cum in my mouth again and the orgasm hit me. Still rubbing myself, I removed my hand from my nipple and started pushing the cum on my cheeks, nose and chin over my lips, watching myself in the mirror as my brother's cum disappeared into my mouth until it was all gone.

I replayed the entire experience in my mind: the feel of Ken's hands on me, watching his cock so close to my face, and his cum shooting in my mouth and all over my face.

I imagined what it would be like to have his hands all over my naked body, rubbing me everywhere. I imagined running my hands through the hair on his chest and stomach, and holding his lovely cock in my hands. I imagined sucking that cock, looking into his eyes with it in my mouth, drinking the delicious cum directly from the source, and how it would feel to do all of that while Andrea and Mary watched.

I was startled by knocking on the bathroom door. Ken said, "Lori, are you in there? I wanna shower."

My first reaction was fear. I didn't remember shutting the door! I looked at the door and it was completely shut, but unlocked. Relieved, yet overcome with lust, I got on my hands and knees with my ass and pussy in the air and facing the door, and called out, "I'm just washing up, do you need to come in?" I stuck two fingers in my wet pussy, half hoping, half dreading my brother opening the door, and leaving the outcome to fate.

"I'll wait 'till you're done," Ken called from the other side of the door. I kept masturbating until I came again, imagining my brother walking in, seeing me and fucking me without saying a word. Fucking me with that giant mushroom head and filling my pussy full of his delicious, creamy cum.

Once I calmed down I was thankful he didn't come in when I invited him to. I would never do that again. I wished he would do something sexual with me but I would never let him know that. He had to be the perv, not me. I was a good girl.

I cleaned up quickly and the day returned to normal, except my mind kept returning to thoughts of my brother and what happened. My friends didn't notice my distraction, and neither did Ken.

Now that my friends are gone and I'm done writing this I'm really horny again. Going to go get off, thinking about all of this again.

9/16 Mon

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I checked the Flap -- the cover is in place again. Can't stop thinking about yesterday. So fucking hot. I'm horny again. Going to rub one out.

9/22 Sun

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This was fucking unbelievable. I'm excited and I'm scared. I'm not sure what to think. I don't know what the fuck is going to happen to me. I'd better start from the beginning.

I had Andrea and Mary over at my house again. I made sure Ken knew in advance that they would be there. Just before they arrived I snuck out through the kitchen door and checked to see if the Flap cover was there or gone. It was gone, so I knew Ken was going to jack off again. I wanted him to cum on me again so bad.

When it came time to go out back with the girls I went with them and hung out for a little bit, then excused myself to go to the bathroom. I told them I was feeling constipated and it could be a while, and to just make themselves at home. I entered through the sliding glass door and searched the house on the pretext of looking for something until I found Ken in the kitchen getting a soda. I grabbed a few sodas and said, "I'll be out back with Andrea and Mary. Did you swim yet?"

He said, "no, maybe later," and left for his room.

This was it. He was going to start jacking off. I quietly set the sodas down and went through the kitchen door to the Flap. Nothing yet. I stood to the side so Ken wouldn't see me and waited. Soon I heard faint sounds coming from his room, but I didn't see him. I heard my friends giggling in the back yard. Then he was there, cock in hand.

I watched him stroke it slowly. It looked so good, so nice and thick, sliding back and forth through his fist. I wished I could wrap my lips around it and run my hands through the hair on his flat stomach. I slid a hand into my bikini bottoms and started masturbating with him.

After a minute he was stroking that beautiful cock vigorously. I opened my mouth and stuck out my tongue. I was ready for his cum.

The first spurt hit my cheek, and I quickly corrected my position so most of the rest went directly on my tongue or in my mouth. I let a couple of spurts hit my cheeks for good measure. I didn't swallow it this time. I let it stay in my mouth and on my tongue, although some flowed out over my lips and down my chin. I would swallow it all up later, after I got the chance to see it in my mouth and on my face. I captured the cum that dripped off my face in my cupped hands and poured it into my mouth. I was shaking with excitement and fear the entire time.

Still shaking, I snuck back through the kitchen and down the hallway, looking straight at the bathroom door, which was open. Beeline to the bathroom, just like last time, right?

Wrong. Ken walked out of his room and into the hallway, right in front of me. I was caught. He stared at me, speechless, looking at my cum covered face.

I hesitated there for a split second, scared and embarrassed, face flushing and mouth closed, full of cum. I didn't want to talk. I brushed past my astonished brother, entering the bathroom and closing the door behind me.

I leaned against the closed door, trying to calm down. Was I dreaming? Did this really just happen? My mind still struggled to accept it. Fuck, fuck, fuck! How could I ever look my brother in the eye again after this? I felt like my world was falling apart and I was completely adrift. My life was only one thing now and that was the unknown. I couldn't stop shaking with fear, and also with excitement. I was still turned on.

Ken had to know I watched him, had to know I was covered in HIS cum. Shit! Could he have figured out that I liked it? I didn't think so. He probably thought that what happened last week happened just now. He knew I caught him perving on my friends and he saw what he did to me. That was all HIS fault, as far as he knew.

I went to the sink and stared at myself in the mirror. Fuck, I looked so depraved -- you couldn't have made porn that looked as debased as I did right then. A fairly innocent, pretty young lady, a 'good girl,' still a teenager, looked at me through the mirror, covered in her brother's cum. It coated my lips and dripped down my chin.

Sure, I was horribly worried about Ken seeing me like he did, but the thought of him seeing me like that also made me so fucking horny. A part of me loved that he caught me. I had this notion that he sometimes looked at me like a sex object, and that turned me on and fueled my secret fantasies. I was probably wrong about it, but the possibility turned me on. Him seeing my face covered in his cum could only help my cause.

I did what I planned then, which was to watch myself in the mirror while letting the cum in my mouth flow out from the corners of my lips, and then over my entire lower lip, over my chin and into my cupped hands. Fuck, I looked so hot.

Yanking the strings of my bikini bottom and letting it fall off, I rubbed my pussy as I devoured the rest of Ken's cum, watching myself in the mirror the whole time. I was determined to orgasm from this fantasy that had spilled over into reality.

I gulped down the remainder of the cum in my mouth and set about licking up everything my tongue could reach. Delicious. I poured the cum from my hand back into my mouth and drank that. Just fucking delicious and sexy as hell. Like the last time, I scooped up all the cum I could from my face and body and ate it all, licking my hands and sucking my fingers clean.

As I resumed rubbing my pussy the thought came to me that surely some of Ken's cum was on my pussy now, and that turned me on even more. Thank god I'm on birth control. Having sex with Ken was my fantasy, not having his baby. But the thought of his cum on my pussy, or shooting inside my pussy, that was hot, hot, hot.

Maybe Ken would want to cum on me again, or do more -- would he fantasize about fucking me? God, I hoped so! Too bad he wasn't a talker. He would never actually try to broker an arrangement to cum on me again. I would agree to that in a heartbeat.

Overwhelmed with lust, I got on my hands and knees like last week and masturbated, imagining Ken walking in, fucking me unconscious and filling me full of cum.

When I was done and cleaned up I joined my friends by the pool and pretended everything was normal. Ken must feel like a wanted criminal waiting for the police to pound on the door and arrest him, revealing his depravity to the world and everyone he knew. I didn't see Ken at all for the rest of the day.

He must be feeling really guilty about it right now, and probably scared as well. Did he expect me to yell at him? To tell on him? Would he try and talk to me about it? That didn't seem like something he would do. My best guess was that he would say nothing and hope I kept my mouth shut, but I couldn't be sure.

I had to be prepared for him wanting to talk to me about it. I had to have my story straight. I decided I would ask him why he did it and I would say I'll keep this secret only because I don't want Dad to literally kill him.

I hope he doesn't talk to me though. I don't want to put him off, just when things were getting good. Maybe if I don't say anything that'll leave the opportunity open for something else to happen. I really know nothing else would ever happen, but I don't want my fantasies to seem even more remote than they already are.

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