Skip to content It started the way the best stories do: with a crash and a sob. I was grinding through a final paper in the upstairs study, the house so silent I could hear the click of the fridge three rooms away, when the front door banged open below me and a strangled little animal noise echoed up the stairs.
I dropped my laptop and moved, already knowing it was Lily. My baby sister was not a crier, not unless she’d truly fucked up, and as I hit the foyer I found her collapsed against the wall, knees up and hoodie sleeves over her face, shaking so hard it made the hardwood shudder beneath her.
I crouched beside her. The scent of burned rubber and cold night air clung to her hair. She wouldn’t even look at me. “Hey,” I said, keeping my voice low, the way you speak to wild animals and little sisters. “What happened, princess?”
She tried to talk, choked, and made it worse, pressing the back of her hand to her mouth and curling deeper into herself. I lifted her gently by the shoulder and forced her to meet my eyes.
I could see her reflection in my pupils, tiny and scared. I kept my voice steady. “Are you hurt?”
She shook her head no, then nodded yes then winced. “I’m sorry,” she whimpered. “I’m so stupid, Ethan. I’m so, so, so—”
“Breathe,” I said. She was hyperventilating. “Lily. You need to take a breath, okay?”
She sucked in air like a drowning swimmer and then exhaled on a whimper. I pressed her tiny hand between my palms. I could almost close my fingers entirely around her wrist. “Tell me. One thing at a time.”
She did. In gasps and shameful, hiccuping bursts, “I took your car, and I know you said not to, but I was just going to Starbucks, and then it was raining and some asshole cut me off and I panicked, and—” She squeezed her eyes shut, as if that could unmake the world. “The front of your car is … gone. The whole bumper, the lights, everything.”
A slow, inevitable warmth spread through my chest. Relief first then anger, at her and myself. She was safe. That was the only thing that mattered.
“The other guy?” I said.
“He kept going,” she mumbled into her sleeve. “Didn’t even stop. I pulled into the gas station and called a tow truck, they took it away. I … I walked home. I’m sorry. Don’t tell mom and dad, please. Please.”
I considered her for a full ten seconds, the way I might study a bomb someone asked me to defuse. Nineteen … Although she looked sixteen tonight.
Her long, soft brown hair fell messily around her face, framing those big, innocent hazel eyes that were currently red and glassy with tears. Her full lips trembled, and even drowned in my oversized hoodie, I could see the delicate curves of her petite body, perky breasts pressing against the fabric, narrow waist, and smooth, pale thighs exposed by her tiny shorts. The same thighs that had ruined me all summer, parading in and out of my line of sight, climbing over furniture, always just out of reach.
I exhaled slowly, collecting myself. “Look at me.”
She did, lower lip trembling.
“First,” I said, “you’re safe. That’s the only thing I care about.”
Her eyes widened, searching for the catch.
“Second,” I said, “what’s rule number one when you’re driving my car?”
Her mouth opened and then closed. She tried for a joke, “Don’t crash it?”
“Don’t take it unless I say you can,” I corrected, voice sharp. “And third, never try to hide something from me. You know what happens when you lie to your big brother.”
I let it hang there, a memory loaded with dozens of old tickle fights, arm bars and all the playful domination that had been a part of our blood since childhood. She knew the game. She never won.
She ducked her head, hair falling over her face. “Are you mad?”
I took her chin between my fingers, forcing her gaze back to mine. Her cheeks were wet, but she was beautiful, always beautiful, even now. “I’m mad that you thought I’d care more about a fucking car than about you.”
She sniffled, shoulders relaxing a micro-fraction. “So… you’re not going to tell them?”
I shrugged. “Not unless you make me. But you do owe me.” The words came out dark, edged with intent. “Big.”
She blushed, the color spreading over her face and down her neck in a wave of pink, instantly visible against her soft skin. She didn’t know whether to laugh or run.
“I’m sorry,” she said again.
I wiped her cheek with my thumb, the gesture somehow both brotherly and not. “You’re going to be.”
For a second we just breathed together, me kneeling at her side, her sniffling quietly. I could smell her shampoo, the sugar and milk of her skin, the underlying trace of fear and arousal she could never fully hide from me. Our parents were out of town for the weekend, somewhere in the Rockies, unreachable for at least two more days. It was just us, like it always had been.
I gathered her into a hug, wrapping her up, letting her cry against my shoulder, stroking her back the way I used to when we were younger. She was tense, rigid with shame, but after a minute she melted into me, her body going warm and pliant in my arms.
I pulled back and studied her. “You okay to walk?”
She nodded.
I took her by the hand and led her to the living room, sat down on the couch and pulled her into my lap like it was the most natural thing in the world. She curled into me automatically, head tucked under my chin, legs across mine.
I stroked her thigh, skin soft as cream, and felt the pulse there. She was trembling, not entirely from fear.
“Lily,” I said, “are you scared of me?”
She shook her head instantly. “No, Ethan. Never.”
“Good.” I turned her chin to look at me again. Her lips were full, cheeks flushed. A tear still hung in her lashes. “Do you trust me?”
She nodded, breath catching. “Yes, Big Brother.”
That did something to me. The way she said it, so soft and so automatic. A year ago, maybe, it would have made me flinch with guilt. Now it was gasoline on a fire I’d been feeding for months.
“Good girl,” I said, and watched her eyes flicker, just a twitch, but enough to tell me everything.
“Do you want me to punish you?”
She blinked. Not the answer she expected, but she swallowed and said, “If you want to.”
I ran my hand up the inside of her thigh, stopping just short of where the shorts began. “That’s not how this works, baby sister. You do what I say, because you need to. You want to be good for me, right?”
Her breathing was faster now, her body arching closer as if she wanted to crawl inside my hoodie with me. “I want to be good,” she whispered.
“Then take off your sweatshirt,” I said. “Let me see you.”
She peeled it off, awkward and shy, crossing her arms over her chest as soon as she was bare. Beneath it she wore nothing but a pale blue bralette, so thin it might as well have been see-through. Her nipples stood out, dark and hard, and the sight made my cock twitch against my sweatpants.
“Arms down,” I commanded.
She obeyed, hands balled into fists at her sides, spine straight, eyes fixed on the far wall. I reached up, brushed her hair behind her ear, and let my fingers trace the curve of her jaw. “You’re fucking gorgeous,” I said, and I meant it. She always had been. But now, with her body pressed against mine, her embarrassment and anticipation mixing into something raw and new, she was more than that. She was irresistible.
“Say it,” I told her.
She blinked. “What?”
“Say you’re gorgeous.”
She stammered. “I’m…gorgeous.”
“Louder.”
She bit her lip. “I’m gorgeous.”
“Good girl,” I said, and I felt her melt in my lap, the heat of her ass grinding unconsciously against my cock. “You’re going to do exactly what I say. No hesitation.”
She shivered. “Yes, Big Brother.”
The words made my brain short-circuit. I’d played the fantasy in my head so many times, always with the self-hatred that came after, but now it was real, here, and she wanted it just as badly. Her legs parted, tiny shorts riding up her thighs, and I could see the damp, dark line beneath. She wasn’t even trying to hide it.
I ran a hand down her bare arm, pausing at her wrist. “Tell me what you did wrong.”
She swallowed. “I took your car without permission. I crashed it. I tried to lie about it.”
“Are you sorry?”
Her eyes filled again, but she nodded. “I’m really, really sorry.”
I kissed her knuckles, the motion half-teasing and half-sweet. “You need to be punished.”
She nodded, eager for it, already surrendering. “Yes, Sir.”
I caught her chin in my hand. “Say that again.”
She flinched, not from fear, but from wanting it so badly she was ashamed. “Yes, Sir.”
“That’s better.” I slid my hand down, hooked my thumb into her waistband. “Off. Now.”
She wriggled out of her shorts, the motion hesitant, but she was so desperate to please that her hands moved on their own. The panties went too, a matching blue to the bra, soaked through in front.
“Stay still,” I said. Then I just looked at her, drank her in: the curve of her hips, the flat of her stomach and the vulnerable softness between her legs. She was perfect, every inch of her. I knew it, and she knew I knew it.
“Have you touched yourself thinking about me?” I asked.
Her blush went nuclear. She looked away, then nodded, once, small and sharp.
“Say it.”
She swallowed. “I… touch myself thinking about you.”
“How often?”
She hesitated, lips trembling. “A lot. I … almost every night.”
“Good girl,” I said, and the praise broke something inside her. Her eyes glazed and she moaned, just a little. My hand traced the inside of her thigh, then up, slow, to the slick, hot center of her. I didn’t ask permission. I just slid two fingers between her lips and felt her arch and gasp in my lap.
“You like that?” I whispered.
She was already so wet it was obscene. “Yes, Sir. I love it.”
I circled her clit, slow, watching her every reaction, and she bucked against my hand, whimpering. She clung to my hoodie, her body small and tight against my chest, hips rolling to chase the pressure.
“Don’t come yet,” I said, pulling my hand away just as she was about to fall apart.
She made a wounded sound, desperate. “Please.”
“Not yet.” I reached down, unzipped my sweatpants, and freed my cock. She stared, eyes huge, lips parted, and for a second I thought she was going to faint.
“Have you ever?” I asked.
She shook her head. “Only with fingers.”
I smirked. “You’re going to learn how to use your mouth, princess.”
She nodded, eager to obey.
“Get on your knees,” I told her.
She slid to the floor, hair falling over her face. She was so tiny there, kneeling between my legs, and so vulnerable it made me want to break her in half with tenderness.
I held her chin, tilted her face up. “Open.”
She opened her mouth, pink and wet, and I guided her to my cock. She hesitated at first, then took the head between her lips, swirling her tongue instinctively, sucking like she’d been made for it.
“That’s my good girl,” I growled, and her whole body shivered. I went slow at first, letting her get used to the size, then threaded my fingers into her hair and took control, guiding her up and down in a steady rhythm. She moaned around my cock, the vibrations making me throb.
“You like pleasing your big brother?” I said.
She nodded, mouth full, eyes pleading for more. I fucked her face, gentle but firm, making her take more with every thrust, until drool ran down her chin and her eyes watered.
“Swallow it,” I said as I finished, and she did, gulping every drop, never looking away from me. When I pulled back she licked her lips, dazed and proud, and I grabbed her by the hips and lifted her back into my lap.
“Did you like that?” I asked.
She nodded, eyes wild. “I love being your good girl.”
“Then you’ll love what comes next.”
I lifted her, carried her like she weighed nothing, and took her to my room. She clung to me the whole way, burying her face in my neck, breathing hard.
I laid her down on my bed, spread her legs, and knelt between them. She was shaking, but not from fear. She wanted this, needed it.
I leaned over her, kissing her jaw, her neck, her chest, then biting her nipple through the thin fabric of her bra until she gasped and writhed beneath me.
“Take it off,” I ordered, voice low and rough. “Show me everything.”
Lily’s hands trembled as she reached behind her back. She unclasped the pale blue bralette and let it fall away, revealing her perky, perfect tits. They were smaller than I’d imagined in my darkest fantasies, a full, soft C-cup with puffy pink nipples already stiff and begging for attention. Her pale skin flushed deep pink down her chest. She was breathtakingly beautiful, delicate and vulnerable, lying naked beneath me.
I groaned at the sight. “Fuck, Lily… you’re perfect.”
She tried to cover herself out of habit, but I caught her wrists and pinned them above her head with one hand.
“Don’t hide from me,” I growled. “This body belongs to me now.”
I released her wrists only to flip her onto her stomach. Lily gasped as I yanked her hips up, forcing her into position on all fours. Her perfect little ass was raised high, back arched, face pressed into the mattress. I ran my hands over her smooth cheeks, squeezing hard before bringing my palm down with a sharp crack.
Smack!
She cried out, her whole body jolting. A bright red handprint bloomed across her pale skin.
“Count them,” I ordered.
“One…” she whimpered.
I spanked her again, harder on the other cheek.
Smack!
“Two— ah!”
I didn’t give her time to breathe. I lined up my thick cock and slammed into her soaked pussy in one brutal thrust. Lily screamed into the sheets as I buried myself to the hilt, stretching her tight little hole around me. She was wet but still so fucking tight.
I started fucking her hard, deep, relentless strokes that made her entire body shake. The wet, obscene sound of my hips slapping against her ass filled the room. Every thrust drove her forward, her perky tits swinging beneath her.
Smack! Smack! Smack!
I rained heavy spanks across both cheeks as I pounded into her, turning her ass a glowing, angry red. Lily was sobbing with pleasure, pushing back against me like a desperate little slut.
“Harder, Sir, please!” she cried.
I grabbed a fistful of her long brown hair and yanked her head back, arching her body as I railed her even harder. My balls slapped against her clit with every savage thrust. I could feel her pussy fluttering wildly around my cock, dripping down my thighs.
“You’re such a filthy little sister,” I growled, spanking her again. “Taking your big brother’s cock like this.”
“Yes, I’m your filthy girl!” she moaned, voice breaking.
I fucked her like I owned her, fast, brutal, and deep. The bed creaked violently beneath us. I spanked her ass over and over, alternating cheeks until both were burning red and she was shaking uncontrollably.
I pulled out suddenly, flipped her onto her back for a moment just to see her face, tear-streaked, flushed, eyes glassy with lust, then flipped her back onto all fours.
“Ass up,” I snapped.
She obeyed instantly, spreading her knees wider and arching her back deeply. I gripped her hips hard enough to bruise and slammed back inside her. The new angle made her scream. I fucked her mercilessly, my hips crashing against her reddened ass with loud, punishing slaps.
Smack! Smack! Smack! Smack!
I spanked her relentlessly while destroying her pussy, each strike making her clench tighter around me. Her moans turned into broken sobs of pleasure.
“I’m gonna cum, Sir, please let me cum!” she begged.
“Cum on your brother’s cock,” I snarled, spanking her hard one final time as I buried myself to the balls.
Lily shattered. Her pussy clamped down on me, pulsing and gushing as she came hard, screaming my name into the mattress. The feeling of her cumming pushed me over the edge.
I roared and thrust deep, flooding her with thick, powerful ropes of cum. I kept pounding through my orgasm, filling her completely, pumping every drop deep into her womb until it started leaking out around my cock.
We stayed locked together, both trembling. I gave her one last firm spank on her bruised ass, making her whimper, then slowly pulled out. A thick stream of my cum dripped from her ruined pussy onto the sheets.
I collapsed beside her and pulled her into my arms. Lily curled against my chest like a kitten, still shaking, her red ass pressed against my thigh.
“Good girl,” I whispered, kissing her forehead. “Such a perfect little sister.”
She smiled weakly, eyes half-closed in bliss, and whispered back, “Thank you, Big Brother…”
“You did so good, Lily,” I murmured, stroking her hair. “So fucking good.”
She curled into my chest, happy and spent, and I kissed the top of her head.
“We’re really doing this?” she asked, voice tiny.
I smiled, feeling her heartbeat against my ribs. “We are. You’re mine now.”
She shivered, not from cold, but from joy. “I want to be yours. Forever.”
I kissed her, slow and deep. “Then you will be. And next time, princess, I’m going to make you beg for it.”
She giggled. “Yes, Sir.”
I held her until she fell asleep, content and safe, the way she should have been all along.
Tomorrow I’d fix the car, make up an excuse for the insurance and keep our secret safe. But tonight, I just watched her sleep, running my fingers over her bare skin, knowing for the first time that I’d never let anything hurt her again.
Not even me.
Enjoyed this story?
Browse the books → Incest Books
Get 50% off your first order.
Use code: FIRSTREAD
Or if you want to read similar stories → Brother sister incest stories