Skip to content I came home on a Friday night to the smell of vodka, Red Bull and someone’s burnt microwave popcorn. I hadn’t planned to be back until Sunday, but my buddy Nick’s flu was so aggressive it killed his desire for hanging out. So I bailed early and drove home, still wearing the last clean pair of sweatpants from my bag, expecting a quiet house and maybe a hot shower.
Instead, I found the entire backyard looking like a dumpster. Once I headed inside, the kitchen counter was sticky with something, my guess was Jäger and orange juice, empty Solo cups scattered like roaches, pizza boxes stacked two high and brimming with crusts, and a collection of empty beer cans filling up the sink. On the living room rug: at least one mystery stain, an upended vase and a string of Christmas lights that definitely hadn’t been up this morning. Oh, and the TV was tuned to some trashy reality show at max volume, with a half-eaten bag of Cheetos perched on top of the remote.
The whole place looked like a kegger had stormed through and then died of embarrassment.
I dropped my duffel in the foyer. My jaw started throbbing the second I realized that, yes, all of this was the handiwork of my sister Riley. Her car was still in the driveway, and unless someone had burgled the house for the world’s shittiest loot, she was probably curled up on the couch, buried in a phone, surrounded by the chaos she’d summoned.
I stalked into the living room and spotted her immediately. Riley: five-four and built like a bratty Instagram influencer, with a mess of wavy chestnut hair knotted on top of her head. She wore a white tank top that exposed two inches of smooth belly, and a pair of shorts so small it was basically denim floss. She lounged on her stomach with one leg propped in the air, scrolling through her phone and giggling at something dumb, bare feet kicking lazily.
She didn’t even look up when I dropped my keys on the coffee table, right next to her elbow.
“Hope the party was worth it,” I said, each word razor-sharp.
She lifted her head just enough to eye me. “Didn’t think you’d be home until Sunday,” she said, like that explained everything. “How’s Nick? Still dying?”
“He’s alive, unlike the house.” I motioned at the carnage. “What the fuck, Riley?”
She rolled over, now on her back, and I tried not to stare at the curve of her hips or how her tits barely fit in that stupid shirt. “It was just a small thing,” she said, voice syrupy. “Chill out. We’ll clean it up.”
“We?”
She shrugged, kicking at the coffee table with her heel. “I was gonna call one of those, like, party cleaners. The ones that get rid of stains and the smell of desperation?”
I had to laugh. “You were gonna call a party cleaner.”
“Yeah,” she said. “You want the number?”
I stared at her. The audacity. My pulse hammered in my neck. I wanted to drag her off the sofa and shake her. Instead, I crossed my arms and said, “You threw a party. In our parents house without asking.”
She grinned, flashing dimples and a mouthful of white teeth. “Yeah, so?”
I felt the veins in my forearms bulging as I pointed at the kitchen. “Clean. Now.”
Riley snorted. “Dude, relax. If you have a meltdown, you’ll get forehead wrinkles. Here.” She sat up, tucking her legs under her butt. “I’ll Venmo you for pizza and you can just forget this ever happened.”
I grabbed her phone out of her hand. She gasped, indignant. “Hey! Rude!”
“Get up,” I said. “Start with the kitchen.”
She sat there, arms folded, eyes hard and daring me to make her. She was a force of nature when she was pissed, but I was bigger and meaner. “Not until you give that back,” she said, like we were in middle school.
I pocketed her phone, walked to the kitchen and began dumping the beer cans into the recycling. She followed me after a minute, muttering curses under her breath, but when she saw I was already cleaning, she just perched on the counter and started scrolling through TikTok on her Apple Watch.
I snatched the garbage bag, tied it off, and dropped it by her feet. “Help,” I said.
She made a show of sighing. “Fine.” She hopped off, went to the sink, and started rinsing cups. I watched her back, slender but soft, the tan lines at the edge of her tank top, and wondered if she was doing this on purpose. She was always a brat, but lately it was more than that. She’d been pushing me for weeks, ever since our parents left for their trip and made me “man of the house.”
Her words, not mine.
We cleaned in silence for a while. Riley filled the dishwasher (badly), wiped counters with Clorox, and occasionally lobbed empty cans at the recycling bin like she was in a frat house. When we finished, she turned to me and smiled, fake-sweet.
“See? All better.”
“It’s not better,” I said. “The house smells like a bar floor.”
“Again, I can call a service.”
“Or,” I said, stepping into her space, “you can learn what happens when you break rules and disrespect the people who clean up after you.”
She laughed, but her eyes went wide for a second. “Ooo, someone’s feeling alpha tonight.”
I grabbed her wrist, firm, and dragged her to the living room. She stumbled after me, protesting, but I barely heard her over the pounding in my ears. I sat down on the couch, pulled her over my lap, and planted her face-first into the cushions.
“Cole! What are you—?”
“You wanna act like a brat, you get treated like one,” I said, locking one arm around her waist.
“Dude, let go! That’s not—” She wriggled, but I held her fast. Her ass was round and plush, and those little shorts barely covered half of it.
She twisted, trying to get up, but I planted my hand on her lower back. “You made the mess,” I said, voice low and dangerous. “You get punished.”
Riley’s voice was muffled in the pillow. “This is psycho! You can’t just—”
The first smack rang out, loud and sharp, right on her left cheek. She went rigid then whipped her head around to glare at me. “You did not.”
I did it again, harder. My palm stung.
She yelped. “Cole!”
“Count,” I said.
Her eyes bugged out. “Are you insane?”
“Count,” I repeated, and brought my hand down on her right cheek, just below the hem of her shorts.
She squealed. “One!”
“Louder.”
“ONE!”
The heat coming off her skin was unreal. I spanked her again, dead center, and this time she gasped, the sound equal parts pain and something else. She started squirming, but the fight was going out of her. I could feel it.
“Two!”
I did five more, switching cheeks, spacing them just enough for her to start dreading the next. After the eighth, her voice wavered and I thought she might cry, but she just buried her face in the cushions.
“Eight,” she whimpered.
“Good girl,” I said, and my cock twitched at the way her whole body went soft at those words.
I tugged at her shorts. “No, no, no—”
I peeled them down, slow, exposing pink cotton panties and the mottled red handprints on her skin. She kicked weakly, but I shushed her and pulled her panties down too, leaving her completely bare from the waist down.
Her ass was flushed, hot to the touch, and perfect. I couldn’t help myself. I stroked her cheek, then laid down the next spank, hard.
She wailed. “Cole! That’s, oh my god, nine!”
“Keep going,” I growled.
She made it to twelve before she started squirming. “Done,” she whispered.
“Not even close,” I said, shifting her in my lap so her thighs were parted. The glisten between her legs caught my eye, and I almost stopped, stunned. Riley was wet. She pressed her face into the couch and tried to hide it, but I wasn’t going to let her off that easily.
I gripped her hip, held her open, and brought my hand down three more times, slow and measured, each one making her squirm and moan.
“Thirteen, fourteen, fifteen.”
“You’re a fucking brat,” I said, my voice half-gone. “And you’re dripping all over my jeans.”
She didn’t answer, just whimpered. I reached down, ran two fingers through her slick folds, and she jerked like she’d been shocked.
“You like this, don’t you?” I said.
“No,” she said, shaking her head, but her hips lifted into my hand.
I spanked her again, softer this time, and she let out a shaky moan. “You sure?”
She hesitated, then whispered, “No. I mean yes. I mean, I don’t know.”
My phone buzzed on the coffee table. I reached over and grabbed it, still holding Riley down with my other arm. The screen lit up with a new message from “Kaylee 💕” one of Riley’s closest friends.
Kaylee, Lmao is it true you have a huge cock?? Your sister won’t stop talking about it 😂
I stared at the screen, blood boiling. Riley froze beneath me.
“You told your friends about my dick?” I growled, voice dangerously low.
Riley squirmed. “It was just a joke, I swear—”
I cut her off with a hard smack across both cheeks. SMACK! She yelped, her massive ass rippling.
“You brag about my cock to your little slut friends while throwing parties?” I yanked her shorts and panties completely off, leaving her naked from the waist down. Her huge, round ass was already glowing red from my handprints.
“It was just a joke, I swear.”
I undid my sweats with one hand, freeing my cock, and pressed it against her thigh. She made a little noise in her throat, like she couldn’t believe the size. “A joke, what do you think?”
“Uhm … that you’re huge.”
“And how did you know that?”
“I might have peeked when you masturbated,” she said before closing her eyes.
I drew in a deep breath. “Oh, I’m not done with you.”
I pushed her legs open and lined up. She was wet and ready. I gripped my painfully hard cock that felt like steel in my fist, throbbing with hours of pent-up frustration, and rubbed the thick head along her soaked slit. Riley whimpered, pushing back against me, but I held her hips firmly in place.
“You’ve been a fucking brat all summer,” I growled. “Throwing parties. Running your mouth about my cock to your friends. Now you’re going to take your punishment like a good little sister.”
I thrust forward hard, burying myself to the hilt in one brutal stroke. Riley cried out, her tight pussy stretching around my thick cock. The feeling was scorching hot, silky wet and so fucking tight it made my head spin. I groaned deeply, enjoying how her walls clenched around me like she was trying to pull me even deeper.
“Fuck, Cole, you’re so big,” she gasped, fingers clawing at the couch cushions.
I didn’t give her time to adjust. I started fucking her hard and deep, slamming my hips against her ass with loud, punishing slaps. Every thrust made her thick cheeks ripple and jiggle beautifully. I watched, mesmerized, as my cock disappeared between those perfect globes, only to reappear glistening with her juices.
SMACK!
I brought my hand down hard on her right cheek. Riley yelped, her pussy clenching around my cock.
SMACK! SMACK!
I spanked her again and again, alternating cheeks, turning her already pink ass a deep, angry red. The sight of my handprints blooming across her huge, soft ass while I railed her made my cock throb even harder inside her. Punishing her like this felt better than I ever imagined.
“You like this, don’t you?” I growled, spanking her hard as I drove into her. “Getting your big ass spanked by your big brother while he fucks you raw.”
Riley moaned shamelessly, pushing back to meet my thrusts. “Yes, fuck, I’m sorry, big brother!”
I grabbed a fistful of her wavy chestnut hair and yanked her head back, arching her body as I pounded her even harder. The wet, obscene sound of my heavy balls slapping against her clit mixed with the sharp cracks of my palm on her ass. Her massive cheeks bounced wildly with every brutal thrust, the flesh rippling and jiggling in the most hypnotic way.
My cock felt really hard, thicker and more sensitive than it had ever been. Every time I bottomed out inside her, the sensation of her tight, dripping pussy gripping me combined with the sight and feel of her huge ass slapping against my hips pushed me closer to the edge. I was punishing her with my cock, claiming her completely, and it felt fucking righteous.
I spanked her relentlessly, covering every inch of her plump ass until both cheeks were glowing bright red and burning hot under my palm.
“I’m gonna cum,” I snarled, gripping her hips hard enough to bruise as I railed her without mercy.
“Inside me— please, I deserve every drop for being a bratty sister!” she begged, voice breaking.
That was all it took. I buried myself as deep as possible and came with a deep, guttural groan. Thick, powerful ropes of cum erupted inside her, flooding her pussy in heavy waves. I kept thrusting through my orgasm, pumping every last drop deep into her, breeding my naughty little sister while her red, spanked ass pressed against me.
Riley came right after me, her walls clamping down hard, milking my cock as she shook and moaned beneath me. Her massive ass quivered with the force of her orgasm.
When it finally subsided, I stayed buried inside her for a long moment, breathing hard, my hands still possessively gripping her reddened cheeks. I gave her one last firm spank, making her whimper softly.
“You’re going to behave from now on,” I said, voice low and commanding. “Or I’ll punish this ass every single night until you learn.”
Riley nodded weakly, still trembling, a satisfied little smile on her face.
“Yes, Sir…” She glanced over, hair wild, eyes still glazed. “So… am I forgiven?”
I smirked. “We’ll see how you behave tomorrow.”
She grinned, pulling her panties back up. “You gonna tell Mom and Dad?”
I shook my head. “Not if you keep your promise to keep quiet about this.”
She nodded, serious for once. “Promise.”
I slowly pulled out, watching with satisfaction as a thick stream of my cum leaked from her ruined pussy and dripped down her thighs onto the couch. She looked thoroughly used: red handprints glowing on her huge ass, hair messy, legs shaking.
I stood up and fixed my sweats, staring down at her sprawled, spent body.
“Clean this mess up before Mom and Dad get back,” I ordered. “And if I hear you telling your friends one more word about my cock, I’ll bend you over the kitchen counter and fuck you again, whether you’ve earned it or not.”
Riley looked up at me, flushed and submissive, a faint, exhausted smirk on her lips. “Yes, Big Brother.”
I grabbed her chin, forcing her to meet my eyes. “Good girl.”
She shivered at the praise, even now.
I left her there on the couch, naked and leaking, and went upstairs to shower.
As the hot water hit me, I smiled. This summer was going to be a lot more interesting than I thought.
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