When I pushed open the door and saw my stepsister Cutie Kim sitting with her ass up playing games on the computer instead of studying for tomorrow’s exam, I lost it.

"Didn’t you promise you’d study hard?" I slammed the door shut and asked in a low, angry voice. She turned around, stuck her tongue out cutely, and that bratty yet adorable expression instantly made my cock twitch with heat.

How Do You Punish a Disobedient Stepsister?

Cutie Kim was wearing tiny hotpants and a tight tank top. The straps had slipped off her shoulders, revealing large patches of smooth, pale skin. She knew she was in trouble, but she still looked at me with those big, watery eyes and whimpered, "Onii-chan… I was just taking a short break…"

I walked over slowly, spun her chair around so she faced me. Her legs parted slightly and the fabric of her shorts was already clinging to the outline of her young, wet pussy. I couldn’t hold back anymore. I grabbed her, lifted her up, and slammed her down onto the desk.

From Scolding to Rough Sex

"Since you love playing so much, big brother is going to play a much more intense game with you." I ripped her hotpants aside, exposing her already dripping pink slit. Cutie Kim trembled but didn’t resist. Instead, she let out a soft, needy moan.

My fingers plunged roughly into her tight, scorching pussy. She bit her lip, her eyes glazing over with lust. "Onii-chan… not like this… ahh…"

Soon I pressed my thick, rock-hard cock against her slick entrance and pushed all the way in. She cried out in a mix of pain and pleasure, her back arching sharply. I started pounding her without mercy, each thrust slamming deep into her womb while the desk shook violently.

Fucking My Stepsister Until She Cums Over and Over

Cutie Kim’s cries quickly turned from protest to pure slutty begging: "Onii-chan… it’s too deep… I’m breaking… ahhh… I’m cumming!" Her tiny pussy spasmed wildly around me, her juices squirting down her thighs and soaking the desk.

I flipped her over, took her from behind, gripped her slim waist like a toy and fucked her senseless. Finally I buried myself as deep as possible and pumped thick ropes of cum straight into her womb, watching it overflow from her swollen, well-fucked pussy.

Afterward, Cutie Kim collapsed limply in my arms, cheeks flushed and eyes still hazy with afterglow. She whispered shyly, "From now on… I’ll study properly… but… Onii-chan has to punish me like this once in a while…"

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