I fucked my sister in the ass 2025

My name is Nathan, a 24-year-old math teacher at an elite private school. Standing at 6’1” with an athletic build honed by years of boxing, I’ve always taken pride in my physique. My lifestyle revolves around fitness and, admittedly, an active sex life. I’ve been with many women—students, colleagues, strangers—each encounter fueling my confidence. But nothing could have prepared me for the forbidden desire that ignited when my younger sister, Bella, moved in with me after our parents’ divorce.

Bella, 19, is a vision of beauty—5’9”, blonde, with porcelain skin and a body that could stop traffic. Her curves are perfect, her presence magnetic. Every man who sees her wants her, and I’d be lying if I said I hadn’t noticed her allure. But she was my sister, and those thoughts were supposed to stay buried. That is, until one fateful evening changed everything.

Chapter 1: Overheard Desires

I came home late one evening, the faint hum of Bella’s voice drifting from her room. Curious, I lingered by her door, catching fragments of a conversation. “Have you ever been with a girl?” a male voice asked, tinny and distant, likely from her laptop. Bella’s laugh was light, teasing. “No, silly. Where would I even see a naked guy?”

I froze, my heart pounding. Was she on a video call? The guy chuckled. “I don’t know, porn maybe? You’ve seen that, right?”

“Yeah, I’ve seen it,” Bella admitted, her tone playful. “But I don’t watch much. Come on, your turn—strip for me.”

“No way,” the guy protested, laughing. “You gotta wait till we’re married.”

“Oh, come on,” Bella teased. “At least let me see your chest.”

“Hmm… maybe,” he relented, and I heard the rustle of fabric.

My curiosity got the better of me. I slipped onto the balcony, the cool night air brushing against my skin, and peered through her window. Bella sat at her desk, her back to me, her blonde hair cascading down her shoulders. She was on a video call, her laptop screen glowing. Then, in one fluid motion, she peeled off her t-shirt, revealing a lacy black bra that hugged her curves. My breath caught. I knew I should look away, but I couldn’t.

Chapter 2: The Temptation Grows

Bella stood, her movements confident, and slid her jeans down her long legs, leaving her in a sheer thong that left little to the imagination. Her ass was flawless, round and firm, swaying slightly as she adjusted her position. On the screen, I caught a glimpse of her boyfriend—a lanky guy, probably her age, stroking his cock. It was average, maybe 6 inches, nothing impressive. Bella, however, seemed enthralled, her fingers grazing her breasts through her bra, then slipping down to her thong, teasing herself.

“God, Bella, you’re so fucking hot,” the guy groaned, his hand moving faster.

She giggled, unhooking her bra and letting it fall. Her breasts were perfect—full, perky, with light brown nipples that stood erect in the cool air. She turned slightly, giving me a side view, and my cock twitched in my jeans. I hated myself for it, but the sight of her was intoxicating. She was my sister, but she was also a woman—gorgeous, sensual, and untouchable.

Bella’s fingers dipped beneath her thong, rubbing her pussy slowly. “You like this, baby?” she purred, her voice dripping with seduction.

“Fuck, yes,” the guy gasped, clearly on the edge. Within minutes, he came, his screen going dark as he disconnected. Bella sighed, pulling her t-shirt back on without her bra, her nipples poking through the thin fabric. I slipped back inside, my mind racing, my body betraying me.

Chapter 3: Crossing the Line

I was in the kitchen, pretending to rummage for food, when Bella walked in, her cheeks flushed. “Hey, Nate,” she said, her voice casual but tinged with nervousness. “When did you get home?”

“A while ago,” I replied, keeping my tone neutral. “Heard you talking to your boyfriend.”

Her eyes widened, a blush creeping up her neck. “You… heard us?”

“Yeah,” I said, leaning against the counter. “Don’t be embarrassed. It’s normal. I do stuff like that too.”

She raised an eyebrow, curious. “You? On camera?”

“Nah,” I smirked. “I mean actual sex. You know, the real thing.”

She rolled her eyes, but there was a spark of interest. “Of course, it’s easy for guys. No one cares if you sleep around. For girls, it’s different. One wrong move, and you’re labeled a slut.”

“True,” I conceded. “But if you’re worried about your rep, try anal. No one talks about that, and it keeps things… discreet.”

She laughed, incredulous. “Oh my God, Nate, are you seriously telling me to have anal sex with my boyfriend?”

I shrugged, my heart racing. “He was begging for it. And honestly, at your age, it’s normal to want to experiment. I’ve been with virgins before—kept it anal to respect their boundaries. It’s all about trust.”

Bella’s expression shifted, her curiosity piqued. “Trust, huh? How do I know he won’t push for more?”

“You don’t,” I said, my voice low. “But if you had someone you could trust… would you try it?”

She hesitated, her blue eyes searching mine. “Maybe. If I knew they’d keep it secret.”

I took a step closer, my pulse pounding. “What if that someone was me?”

Her jaw dropped. “You? Nate, are you serious?”

“I’m just saying,” I backpedaled, keeping my tone light. “I’m experienced, discreet, and I’d never hurt you. Plus, let’s be real—I’m not exactly hard on the eyes.”

She laughed, but there was a nervous edge to it. “You’re my brother, you perv.”

“And you’re fucking gorgeous,” I shot back, testing the waters. “I’ve been with plenty of women, Bella. I know what I’m doing. And it’d stay between us. No one would ever know.”

She bit her lip, her resolve wavering. “You’re insane. But… if we did this, you’d only do anal, right? Nothing else?”

“Scout’s honor,” I said, raising my hands. “Your call, sis. I’m here if you change your mind.”

Bella shook her head, half-smiling. “I’m going to shower. If I decide anything, I’ll let you know.”

“Take your time,” I said, watching her walk away, her hips swaying. My cock was rock-hard, and I knew I was playing with fire.

Chapter 4: The Shower

An hour later, Bella called me from the bathroom. “Nate? Come here.”

I stepped into the steamy room, the glass shower door revealing her silhouette. She was naked, water cascading over her body, her blonde hair plastered to her back. Her ass was unreal—firm, round, begging to be touched. She turned, her eyes meeting mine, unafraid.

“You sure about this?” I asked, my voice thick.

She nodded, stepping out of the shower, her body glistening. “Just… don’t rush it, okay? And don’t stare too much.”

I chuckled, stripping off my shirt. “Too late for that.”

Bella’s eyes widened as I dropped my jeans, my boxer briefs barely containing my erection. When I slid them off, my cock sprang free—8 inches long, thick, and veined. Her hand flew to her mouth. “Holy shit, Nate. That’s… huge.”

“19 centimeters long, 10 centimeters around,” I said with a grin. “Don’t worry, I’ll go slow.”

She swallowed hard, her eyes locked on my cock. “I… I think I’ll just suck it first. Get you off that way.”

“Oh, you’ll do that too,” I said, stepping closer. “But I’m fucking you, Bella. Don’t chicken out now.”

She nodded, her breath shaky. I reached for her, my hands grazing her wet breasts, her nipples hardening under my touch. I kneaded them gently, savoring their softness, then leaned down to suck one into my mouth. Bella moaned, her hands tangling in my hair.

“Fuck, Nate,” she whispered, her body trembling.

I knelt, kissing my way down her stomach, my fingers brushing her shaved pussy. Her lips were plump, glistening with arousal. I parted them gently, my tongue flicking against her clit. She gasped, her knees buckling, and I steadied her with my hands on her hips.

“Lie down,” I said, guiding her to the bathroom floor. The tiles were cool against her skin as I spread her legs, diving back in. I licked her pussy slowly, savoring her taste, my tongue circling her clit until she was writhing, her moans echoing off the walls.

“Oh God, Nate, I’m gonna—” Her words cut off as she came, her body shuddering, her pussy clenching against my mouth.

Chapter 5: The Forbidden Act

I stood, my cock throbbing, and helped her to her knees. “Your turn,” I said, guiding her hand to my shaft. She wrapped her fingers around it, her touch tentative but eager. She leaned forward, her tongue darting out to lick the tip, tasting the precum.

“Fuck, Bella,” I groaned as she took me into her mouth, her lips stretching around my girth. She bobbed her head, her tongue swirling, and I fought the urge to thrust deeper. After a few minutes, I pulled her up, my patience wearing thin.

“Turn around,” I said, my voice rough. She obeyed, bracing herself against the sink, her ass arched invitingly. I grabbed a bottle of shampoo, using it as lube, and coated my fingers. I slid one into her tight asshole, working it slowly, then added a second. Bella gasped, her body tensing.

“Relax,” I murmured, kissing her shoulder. “You’re doing great.”

When she was ready, I coated my cock with more shampoo and pressed the tip against her hole. “Breathe,” I said, pushing forward. She cried out, her hands gripping the sink as I inched inside, her tight heat gripping me like a vice.

“Fuck, it hurts,” she whimpered, but I kept going, slow and steady, until half my cock was buried in her ass. I paused, letting her adjust, my hands roaming her breasts, pinching her nipples.

“You’re so fucking tight,” I growled, starting to move. I fucked her slowly at first, each thrust drawing a moan or a cry from her lips. Her pain gradually turned to pleasure, her hips rocking back to meet me.

“Harder,” she gasped, surprising me. I obliged, gripping her hips and pounding into her, my cock sinking deeper with each thrust. Her ass jiggled with every impact, her moans growing louder, more desperate.

Chapter 6: The Bedroom

I carried her to my bedroom, my cock still hard, and laid her on my bed. A hidden camera, tucked discreetly in the corner, recorded everything—I’d deal with that later. I positioned her on her back, her legs spread, and slid back into her ass, the angle letting me see her pussy glistening with arousal.

“Touch yourself,” I said, and she obeyed, her fingers circling her clit as I fucked her. Her breasts bounced with each thrust, her nipples hard and inviting. I leaned down, sucking one into my mouth, my teeth grazing the sensitive peak.

“Nate, I’m gonna come again,” she moaned, her fingers moving faster. Her pussy clenched, her body shaking as another orgasm ripped through her. The sight pushed me over the edge, and I pulled out, stroking my cock until I came, thick ropes of cum splattering across her stomach and breasts.

We collapsed together, panting, her head resting on my chest. “That was… insane,” she whispered, her voice hoarse.

“You were amazing,” I said, kissing her forehead. “No one will ever know.”

She smiled, but there was a flicker of guilt in her eyes. “This stays between us, right?”

“Always,” I promised, though the camera’s red light blinked silently in the corner.

Epilogue

Later, as Bella showered again, I slipped into my room and saved the footage. Her boyfriend’s video call was one thing, but this—this was ours, a secret we’d carry forever. I knew I’d fucked her in a way no one else ever could, and the thought made my cock stir again.

Maybe I’d tell the story someday, anonymized, on some dark corner of the internet. For now, though, it was just me and Bella, bound by a forbidden act that neither of us could ever forget.