My sister found out about my huge cock ... Then she wanted to film porn together.

I woke up and looked down at the morning glory tenting the sheets. As I reached for my cock, my hand tangled in strawberry-blonde hair.

Then I stiffened when I felt someone breathing against my neck, and I picked up a feminine scent. I twisted to the left, ready to jump out of bed, but I recognized her high cheekbones and button nose. It was my twin sister.

She opened her eyes and smiled. "You look like a deer caught in the headlights."

I reached for my glasses and pushed them up my nose. "What are you doing here?" She had moved out a year ago, when both of us started college. We were nineteen, but I had not bothered leaving, since unlike her I got along with our mom.

"Sorry if I scared you," she said, pulling her hair into a ponytail. My eyes trailed down to her shoulders, and luckily I saw the straps of a bra. "Tiffany and I got kicked out of our apartment, so I had to move back. I couldn't find a sheet for my bed, so I decided to crash here."

"You could have told me before sneaking into my bed like this."

"Sorry," she said, making a little fake-shy face that only made her look more attractive. I tried to look away, but she brought up the forbidden dreams I had been pushing to the back of my mind. She was gorgeous, and I was having a hard time thinking of anything else.

When we were growing up we had been intimate the way siblings are. Our parents had photos of us kissing and holding hands, but puberty pulled us apart. She attracted attention like no other girl. She had well-endowed breasts shaped like perfect teardrops, and her curves were close to perfection. She was not dumb, either. She was intelligent enough to use her beauty, getting her way with her voice or a jiggle of her breasts.

She fixed her eyes on the tented sheets. "What's that?" she asked, and she was just about to reach for it.

I grabbed her wrist, though deep inside I had fantasized about having her fingers curled around me. "It does that in the morning," I told her, blushing.

"You look well hung," she said, stifling a giggle. "From what I remember, you used to have a pinky."

I awkwardly tucked it into the waistband, but my underwear was loose and did not clamp it down. "You aren't the only one who hit puberty." I kept facing the wall. It was hard to keep my eyes on her when we were lying this close, and harder still to tame the erection.

"Why don't you look at me when I'm talking to you?" she asked, giving me a light punch on the shoulder. "I'm your sister, after all."

I could feel her eyes on my back. Attention was almost everything she cared about these days. I did not follow her on Instagram, because I was afraid the temptation to masturbate to her photos would be too great, and I already had a friend who would not leave me alone about her.

I drew in a deep breath and rolled to the side. Her blue eyes sparkled, and she laid her hand flat on my chest. As soon as she touched me I was about to melt from the heat. "Why are you so tense?"

"I just didn't expect to wake up next to you," I stammered.

"We always used to sleep together," she pointed out.

"That was before puberty."

"So?"

She pulled the sheets down to her waist. She had to be wearing a blue teardrop bikini with spaghetti straps instead of a regular bra. It barely covered her nipples and areolas, and it left miles of her flesh as taboo eye candy.

My eyes drifted to her cleavage, but she reached for my chin and gave it a gentle lift. "My eyes are up here," she teased, a smile playing on her lips.

At that moment I caught a foreign scent, completely new but similar to sweet urine. It sparked my imagination, and I wondered where her fingers had just been.

"Maybe we should just go and eat some breakfast before Mom finds us here," I said. Sweat prickled my scalp. It was getting hot, and my erection throbbed harder than ever.

"What?" she asked, clearly not liking the idea. "Why would it be a problem for her to find us lying side by side, enjoying a morning conversation?"

"You do the math."

"You do the math," she hurled back. "I'm not a smartass like you."

"I disagree," I said. I was careful about stroking her ego, but she was not dumb by any means. "By all seriousness, Nadya, you should be going."

"Why don't you ever have some fun?" she kept pestering me. "It can't be fun living like a hermit—"

"Mark?" my mom called from outside the bedroom. "Can I come in?"

My sister quickly threw the sheets over herself, giggling like mad. I had thought she would have grown up after a year in college, but she was still that playful child. "Sure," I said, feeling sweat at my temples.

Mom opened the door in a purple silky morning robe, the belt tied so tight that her bust and hips strained against it. She had brushed her dark-blonde hair, and it glittered down her back. Nadya had inherited her beauty, and it was sometimes painful to admit that I found our mother equally gorgeous. Same blue eyes, same flawless cheekbones.

"Just a heads up, your sister will move back today."

I felt a few fingers creeping toward my thigh. Was she actually going for it? I slipped my hand under the sheets and waved her off. "Okay, thanks."

"I'll make some breakfast for you," Mom said, luckily too tired to hear her daughter giggling under the sheets.

After she closed the door, I let out the deepest breath of my life.

Nadya threw the sheets aside, grinning from ear to ear. "We almost got caught."

"Please, get out of here," I told her in a hushed voice.

"Oh, look who's speaking now," she said, lying on her side and trying to seize my attention with her breasts. "Why don't you just go yourself? Is there something you're trying to hide from me?"

Her sneaky fingers were inching toward me again. I sprang out of bed, snatched my pillow, and kept it in front of me as I scrambled into the bathroom. I did not have another choice, since she would have dragged it out.

\*\*\*\*\*

I did not see her again until the afternoon. I had only meant to pass the window, but she was sunbathing on the grass with Catalina. Catalina was already tanned, her dark hair spilled down her back, and she had one of the most gorgeous heart-shaped asses I had ever seen. Her obsidian eyes looked like two rare gems. She was from Argentina, and she spoke with an accent that made me melt. She was just as wild as my sister.

"I don't want to be a stupid sales assistant or a dirty waitress," Nadya was saying. "I want to have fun and do something exotic. I've been thinking of filming some adult stuff."

Catalina gasped, and my eyes widened.

"No way."

"Why not?" Nadya said, inching her hips closer. "I just read an article about how much money pornstars are making. They're riding the gravy train. Think about it, just lying there being fucked all day by some well-endowed man, and you get paid. Big time."

Catalina rolled onto her side, and her breasts fell on top of each other. She propped her head up with one hand. "You have to do some work yourself, though. No guy wants to masturbate to a dead fish."

"Who doesn't want a big cock to suck on?" Nadya asked, licking her lips as she lost herself in the idea.

"Or get fucked by one," Catalina added, reaching down to rub a finger over her bikini. I saw a wet patch growing in the middle. "But most of the guys I've been with are tiny."

"You need something big for your impressive ass."

Catalina brushed the blonde hair away from Nadya's face. "And a big load for your beautiful face. We could make so many dirty films together. I don't want to miss my window."

"You're putting me on the spot here," Catalina said, stiffening. "I never said I wanted to join in on your dirty ideas."

"I'll make you," Nadya said, squeezing her ass. My sister was known for getting her way, and even her best friends found her hard to resist.

"We'll see. The hardest part will be finding a man who is well-equipped for the job."

"Yeah, that's what I was thinking. But it's just an idea for now."

"And I hope it remains one."

Nadya kissed her straight on the lips. "Thank you, but I'll wait a few days."

The kiss hardened my cock until it felt as if it were about to break through the zipper. I left the window before either of them looked up.

Catalina stayed for dinner. I came down in baggy shorts, because I already knew I would pop wood and did not want to spend the meal trying to conceal it. Both of them were still in those teardrop bikinis. Mom wore a blue summer dress with a plunging neckline, and she gave Nadya a look every time my sister turned the flirting on. I survived the burgers. The ice cream was harder.

Mom pulled a box from the freezer and gave us each a bar. All three of them licked the white cream in tandem. Nadya spilled it over her fingers and sucked each one more than necessary, while Catalina's tongue worked hers until it shone. I watched a second too long, and Catalina caught it and smirked at me. I looked the other way and hoped she would not get the wrong idea.

"Okay, Nadya, that's enough," Mom said.

"What?" she said, pretending not to understand. "You know I love ice cream."

After Catalina hugged my sister goodbye, she opened her arms to me. "It was nice seeing you again." My hand bumped into hers as I went to embrace her. She played it off with a smile and did not give up, pulling me in and mashing her breasts right against my chest. She must have felt my erection. Even in shorts twice my size, my cock was hard as steel.

"You too," I said, catching the scent of a rosy perfume.

I felt a stabbing pain in both balls and knew I could not endure it any longer. I almost stumbled on the first step running up to my bedroom. I tore off my belt, pulled my shorts and underwear down to my ankles, and dropped into my chair. It was the first time in a long while I had grasped my shaft without some steamy porn to watch. I imagined Catalina still in my arms and tried my hardest not to think of my sister, but she kept flashing through my mind anyway. My hips bucked, and I fired a thick rope of cum over my chest and stomach, spilling the rest over my fingers.

Right then the door swung open and my sister stepped in.

"Can you help me with my computer—" She cut herself off with a loud gasp, and her hands flew to her cheeks. "It's enormous," she stammered.

My face flushed as if it were on fire. I pulled my shorts up at once, smearing the cum all over my clothes. "What are you doing? Get out of here!"

It was the first time she had seen my cock since puberty. She slowly closed the door, but I saw the widest grin spread over her face.

\*\*\*\*\*

I barely slept. The next morning Mom was away for work, and I heard my sister pacing the living room. It was strange that she had not gone out with her friends yet. I had a feeling she was waiting for me. When my lunch break came, I did not have another choice but to face her.

I caught the scent of her pear shampoo, along with something else I had caught earlier, when she snuck into my bed. The moment I set my foot on the floor, she called for me.

"Good morning."

I did not look at her. "Good morning," I said, heading straight for the kitchen.

"Can I have a word with you?"

"I have to eat and then go back to work," I told her, opening the fridge for the leftovers.

"I'm also going to eat," she said, already right behind me. Her presence sent a shiver down my spine. I pushed my food into the microwave and tried to ignore her.

"Are you embarrassed about yesterday?" she asked. "If you are, I won't tell anyone. We all masturbate."

"Nadya, you're my sister. Please don't mention it again." I accidentally glanced at her. She was twirling her blonde hair on her finger, wearing another microkini, with only three triangles covering her, and she had put on the sluttiest makeup, looking exactly like the pornstar she wanted to become.

I took my food and sat down. She joined me shortly after, of course choosing the seat right in front of me. "If you're in such a hurry, maybe we can talk over lunch."

She was getting on my nerves. "What exactly do you want?"

"I want your help," she said, getting a spoon of Mom's stew into her mouth.

"You have to be a bit more specific than that."

"I don't want you to choke on your food," she said, tittering.

Now I feared the worst. I laid the silverware aside and inhaled. "Just spit it out. I don't have all day."

"Well, as you probably know, I'm struggling in school, and I don't enjoy the jobs I've been offered. I want to try a new career, but I need a man, and you would be the perfect match."

I arched an eyebrow. "You want to offer me a job?"

"Not exactly. I want you to be part of one of my projects."

"If you don't get straight to the point, I'll go up to my room and eat there."

"I need your help to become an adult entertainer."

"Go do your dirty stuff, then."

"I can't without a man."

"Find your man, then," I told her, and started eating again. I had suspected she needed help with a website. Despite the bratty behavior, I did not dislike her. We had always had feelings for each other, and we were family.

"I need a man who is well-hung."

I dropped my spoon onto the table and raised my eyes to hers. She did not blink. She was dead serious.

"What the fuck, Nadya?"

"Come on," she said, giving me a little kick under the table. "I know you watch me."

"No, I do not."

"Why are you overreacting, then?"

"Because I'm your brother."

"So?" she asked, and she really was not bothered by the incest part. "It might be taboo at first, but you would rather have a taste of that forbidden fruit, wouldn't you?"

"Okay, maybe I have fantasized now and then," I admitted. "But I'd never in my life act in a pornographic film with you."

"What do you usually watch to get you off?" she teased. "Why sit and watch others enjoy themselves when it could be you? I've been with some guys, and you are way beyond average. The biggest cock I've ever seen, to be honest. Your joystick was made to pleasure a girl. It wasn't made to be stroked by the owner."

"Nadya," I said, wanting her to stop. I could have run upstairs, but I already felt her grip tightening. "Again, this isn't even legal."

She rose and sat next to me. She took my hand and gently guided it to the center between her legs. "What are you doing?"

"What do you think? If you are against this, why aren't you resisting?"

She lowered my hand right onto her, with only the fabric of her micro bikini separating my touch from her. It was wrong, but it felt thrilling. I gently rubbed my finger over her, feeling a warmth and wetness unlike any other. She spread her legs wider, spreading a scent of honey, and then she touched my hardening bulge with her other hand.

"You're getting turned on. Why can't you just be honest and tell me how you truly feel about this?"

I drew a circle on her bikini, prodding deeper until her honey seeped through the fabric, while she stroked the tip. It would have felt better if she had reached in and grabbed me. I drifted to the side of the fabric and touched the border of her. "You can touch me all you want," she urged.

She was about to pull the bikini aside, but I stopped her. The blue balls were about to derail me. "Just give me some time to think about it, okay?"

"Alright," she said, and pressed her lips to my cheek.

Upstairs, I licked my fingers and tasted her. I had never touched a pussy in my life, and the truth was that I wanted more. She had been right. I had watched her for a long time. I crawled into bed with my head spinning, asking myself whether I was really considering losing my virginity to my own sister, and what it would do to Mom if she ever found out. The sheets rose in the middle of the bed anyway. I knew what my cock wanted. I would have to sleep on it.

\*\*\*\*\*

I dreamed of a light glowing around my cock, so intense that it eventually pulled me out of the dream. Waking up, I realized it was not magic but a pleasure so strong I had mistaken it for one. I picked my head up and saw something bobbing beneath the sheets. I lifted them. Right between my legs lay my sister, with my cock stuffed in her mouth. The muscles of her throat massaged the head. She pulled back and gave the slit a kiss, a string of saliva still stretching from her lip to the crown.

"I just thought I'd stop by," she said.

"Christ, Nadya, you shouldn't be sucking me."

"We have done a lot of naughty things we shouldn't be doing." She plunged me into her mouth again, letting it slide in and out without using her hands.

"Oh my God, that feels amazing." I glanced at the door and, to my relief, it was shut. "What time is it?"

"Three in the morning." She licked her lips and took me back into her mouth.

My head spun with guilty pleasure. Despite my brain screaming at me to stop, I reached for her head and helped feed her. It was not too late to abort, and I asked myself what the hell we were doing, but I was not even close to pushing her away. "God, you're crazy. Our mother's bedroom is right next to mine."

She came off with a wet pop. "You better not raise your voice, then." She kept me in her grip as she descended again, breathing onto the crown. "You're so big." She stroked the shaft harder. It was so wet it was like stroking a bar of soap.

"I can't believe this is happening," I mouthed, trying to push further into her mouth. I yielded. It felt too damn good, and too thrilling, to listen to the voice telling me to stop.

I felt something light tickling my thighs. I lifted the sheets again and noticed she was topless, her breasts hanging down and brushing me. I could not finish whatever I had meant to say. She stuffed me deeper, and I reached for a fistful of her hair. With a hard grunt I exploded inside her, the hot cum splashing in her mouth, and my head fell back onto the pillow.

She kept me in her mouth, sucking me clean before coming off with a smack. My cock swayed and fell flat on my stomach. She teased me with a few more licks, then crawled up and lowered her head onto the pillow next to mine. "How did it feel?"

"Please don't do that again." It had been my biggest forbidden dream, and it had just come true. I twisted my head and noticed a string of cum dribbling down her chin. "You have something left on your chin."

She licked it up. I touched my waist, since I was used to having cum on my stomach after an orgasm. "Where did it go?"

She opened her mouth and stuck her tongue out. "I swallowed everything. How a sister is supposed to behave."

I shut my mouth as our mom opened her bedroom door. Nadya quickly threw the sheets over herself. Every footstep made my heart beat quicker, and sweat broke out on my forehead. Mom passed my room, and I could finally breathe as she went to the bathroom. Then something bobbed beneath the sheets again.

"God damn it, Nadya," I said as she wrapped her lips around me once more.

She came crawling back up with a giggle. "I just wanted to clean it properly—"

I pushed a finger over her lips. "Don't talk so loud."

She rolled her eyes. "Have you thought about what we talked about earlier?"

I could not even be angry. It had been one of the greatest sexual experiences of my life. "I'll think about it tomorrow."

"Can you lay on your side?" she asked, drawing a circle on my chest. "I prefer eye contact when speaking."

I did as she wished. She was so beautiful lying there in front of me that I melted. Her blonde hair glowed in the dark, and her breasts were capped with pink areolas and pink nipples. I felt the urge to ravish her just looking at them. She laid her hand on my shoulder. There was not much muscle there to brag about.

"You still didn't answer my question about the blowjob."

"It was great," I admitted. "The best sexual experience of my life."

"How many others have there been?"

The question weighed me down with shame. "Only from my hand."

"You can break that curse anytime you want with me. Don't forget that."

"A blowjob is one thing, but sex is another."

She obviously was not agreeing. "We just blasted the taboo barrier to bits. Let's take it a step further."

"You honestly don't feel weird about this?" I asked, searching her face.

"Not at all," she said, giving me a firm look. "Mark, I love you, and you're my brother. I'd do anything for you, even pleasuring you." Her finger traced my chest and down to my cock. "Do you feel the thrill?"

I did, especially with our mom moving around outside, making me sweat at the same time. She halted in the middle of the hall, and the seconds felt like an eternity. I put a finger over Nadya's lips as she was about to say something. My heart was about to jump out of my chest. Then Mom sneezed and went back into her bedroom. I wiped my brow and took a deep breath. "I was about to pass out."

"Do you want to touch my breasts?" she offered, right out of the blue.

"I've always wanted to," I admitted. "Ever since you hit puberty and I saw them blossom in front of me."

"Touch them," she said, pushing her chest toward me.

"You sure?"

"Yeah, I just sucked you," she said, laughing.

I cupped them. They were incredibly soft, and it was so satisfying to sink my fingers into her skin that my face must have said everything. "God, they are soft."

"Have I made you change your mind now?"

I surrendered. "How do you expect a virgin like me to last like a [pornstar](https://juliusincestus.com/category/incest-stories/)?"

The grin spread over her face. "I will tutor you. If they can do it, then so can you."

"Well, as long as my face won't be on the camera, I guess we could give it a shot."

She threw her arms around my neck and wrapped her legs around mine, so I felt her wet panties. "You're the greatest," she said. She brushed the hair from my face and planted a kiss right on my lips, the first in years, and powerful enough to knock the worry out of me.

"When will we begin?" I asked her.

"Tomorrow."

I swallowed hard, since that was sooner than I had expected. She kissed me again, and in the end I did not worry about a thing.

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