Alex's pulse thundered in his ears as he hovered at Laura's cracked door. The room was a cave of shadows and laptop glow. Laura lay sprawled across the bed, headphones on, one hand buried inside her tiny sleep shorts. The fabric stretched and shifted with every slow, deliberate stroke. Her lips parted in a silent moan, hips rolling in tiny, greedy circles. The laptop screen flickered—porn, unmistakable. A low, breathy whimper escaped her throat, and Alex's cock surged against his zipper, thick and aching.
She is your Stepsister!
The word was a whisper against the roar of his blood. He should leave. Instead, his feet stayed rooted, eyes locked on the slick shine between her thighs as her fingers moved faster. Her back arched, a shudder rippling through her body. She came with a soft, broken cry, thighs clamping around her hand.
Alex backed away on silent feet, cock throbbing so hard it hurt. Shower. Now.
Cold tiles. Hot water. Steam curling around him like smoke. He braced one hand on the wall, the other wrapped around his shaft, stroking in long, punishing pulls. The image replayed: Laura's open mouth, the way her shorts had clung to her soaked fingers, the scent of her arousal still ghosting his memory.
But she is your Stepsister, his conscience hissed again, louder this time.
His dick answered in his mind, Shut the fuck up. You've been parroting that line since day one. She's only a step—paperthin bullshit. I could bury myself in that hungry pussy right now, and it wouldn't be an issue. That bitch was touching herself like she's starving for cock. My cock. Give it to her.
His desire building a forbidden fantasy that made his strokes quicken.
He imagined pushing that door wide open instead of retreating. Laura's eyes snapping to him, wide with shock at first, then darkening with that same reckless heat she'd shown in the kitchen. "Alex?" she'd gasp, hand still buried between her legs, fingers glistening. But she wouldn't stop. No—she'd slow her pace, teasing, holding his gaze as her hips bucked. "You were watching me, weren't you? Perv."
He'd step inside, door clicking shut behind him. "Couldn't help it," he'd mutter, voice rough, cock straining against his pants. "You looked so fucking good." His hand would move to his zipper, freeing himself. "Come here," she'd whisper, pulling her hand free, slick fingers beckoning. "Show me what you want to do."
In his fantasy, he'd cross the room in two strides, grabbing her ankles and yanking her to the edge of the bed. Her shorts would come off in one rip, exposing her dripping pussy—pink, swollen, begging. "Stepsister," he'd growl, but it wouldn't stop him. He'd drop to his knees, burying his face between her thighs, tongue lapping at her clit like he'd sucked her finger earlier. She'd taste like salt and sweetness, her hands fisting in his hair as she moaned, "Oh God, Alex—don't stop. Fuck, you're my brother, this is so wrong…"
But wrong felt right. He'd rise, positioning his cock at her entrance, the head nudging her slick folds. "Tell me you want it," he'd demand, teasing, rubbing against her clit. She'd arch, desperate. "I want it. Fuck me, stepbrother. Hard." He'd thrust in—one deep, claiming stroke—filling her completely. Her walls would clench around him, hot and tight, pulling him deeper. "Fuck me, step brother," she'd whimper, nails raking his back. "Stretch me. Make me yours."
He'd pound into her, the bed creaking under them, her breasts bouncing with every slam. "This pussy's mine now," he'd grunt, one hand pinning her wrists above her head, the other pinching her nipple until she cried out. She'd wrap her legs around his waist, heels digging into his ass, urging him faster. "Come inside me," she'd beg, voice breaking. "Fill your stepsister up." And he would—exploding deep, her orgasm milking every drop as she screamed his name.
Alex stroked faster, the fantasy looping, his balls tightening as release built. The water pounded his back, masking his ragged breaths.
A sharp knock shattered the fantasy. "Alex!" Laura's voice, impatient. "I need to go to Jess's. Out."
He killed the spray, hand freezing midstroke. "What?"
"I said, get out! My friends are waiting for me to pick them up, and I need the bathroom now. You've been in there forever—what the hell are you even doing? Come on, open up!"
"Will you give me five minutes?" he snapped, trying to will his erection down.
"No! They're literally texting me right now. Come out now. You've been in the bathroom for God knows how long. Are you listening to me? Out now!"
Yes. She was right. Alex had lost track of time in his haze. And with her banging on the door like that, shouting demands, he couldn't masturbate in peace. His cock was still rockhard, throbbing angrily at the interruption. He grabbed a towel, wrapping it low around his hips. The fabric tented obscenely, the outline of his erection impossible to hide. He took a deep breath and yanked the door open.
Laura stood there in a cropped tank and denim cutoffs, hair in a messy bun, arms crossed under her breasts—pushing them up just enough to make his situation worse. "Look, you made me wait forev—" Her gaze dropped to the towel. "Hey, what is that?" She pointed, eyes narrowing.
Alex nervously shifted. "What is what?"
"That bulge. What are you hiding in your towel? Is it something of mine?"
"Nothing," he said quickly, heat creeping up his neck.
"Come on, don't lie. Is that my shampoo bottle? Are you stealing my shampoo bottle so I can't do my hair before the party?"
"What? No! Why the hell would I do something like that?"
"For revenge! I interrupted your sweet, long bathing time, and now you're trying to sabotage me. Hey, give it back right now."
"Seriously, I didn't take anything. You're being paranoid."
"Let's verify that." Her smirk was pure challenge.
Before he could react, Laura lunged forward, grabbed the edge of the towel, and yanked it away.
It fell to the floor with a soft thud.
His cock sprang free—thick, flushed, a bead of precome glistening at the tip. The bathroom light caught every vein, every inch of him throbbing in the sudden air, still halfhard from his interrupted session.
Laura froze, her mouth dropping open in a perfect O. Her eyes went wide, pupils dilating as she stared. Alex was stunned too, rooted to the spot, his face burning.
Seconds stretched into eternity. Then, almost unconsciously, Laura's hand lifted—slow, trembling—reaching toward him, fingers extending as if to wrap around the swollen shaft.
Right before her fingertips could brush the sensitive skin, Alex shouted, "Sister!"
The word snapped her back. Laura blinked, yanking her hand away like she'd been burned. Her cheeks flamed crimson. She snatched the towel from the floor, hurled it at his chest, and bolted into the bathroom, slamming the door so hard the frame rattled.
Alex stood there, dripping water onto the tiles, his cock bobbing in the cool air, furious and denied.
Why, dude? it seemed to shout in his mind. Why the fuck?
Almost an hour later, Alex sprawled on his bed in his room, mindlessly scrolling through social media on his phone. The images blurred together—memes, friends' vacation pics, nothing sticking. His thoughts kept drifting back to the bathroom, to Laura's wide eyes on his cock, her hand so close he could almost feel the ghost of her touch. He shifted uncomfortably, adjusting his sweats as his body stirred again.
The door burst open without a knock. Laura stormed in, now changed into a tight black minidress that hugged her curves like a second skin, the hem riding high on her thighs. Black heels clicked against the hardwood, and her hair was down, waves cascading over her shoulders. She looked ready for trouble.
"Alex, listen," she said, hands on her hips.
He jolted upright, heart skipping. "Dude, can't you knock? What if I was changing or something?"
"Shut up. I have more important things to deal with than your privacy right now. Listen to me—I need your help. Jess's big sister was supposed to drive us to the party, but she had to bail at the last minute to go to her sick friend's house. And none of us girls can drive. So, that's why you're going to drive me, pick up my friends, and then take us all to the party."
Alex leaned back against his headboard, a slow smile spreading across his face. "No."
Laura's eyes narrowed, her foot tapping impatiently. "You mother… you know what, forget that. Listen, I already told them all about you stepping up to help. It's my reputation on the line here—if you flake, I look like a liar. Now get up and get moving."
"And why should I care about your reputation?" he shot back, crossing his arms.
Laura stepped closer, her voice dropping to that bossy tone he both hated and secretly craved. "Because I say so. Because we're family now, remember? Get up, Alex. Don't make me drag you."
"Should I call Lina and ask about this party? I'm sure she'd love to hear the details—latenight, friends you probably haven't told her about…"
Laura's face twisted in fury. "I'll kill you in your sleep, you know that? Slowly, with a pillow over your smug face."
Alex chuckled. "That's not exactly the voice of someone asking for a favor, you know?"
Laura paused, her chest rising and falling as she fought for control. She exhaled sharply, then softened her expression—though her eyes still sparked with irritation. "My dearest brother, can you please drive me and my friends to the party? Pretty please? I'd really appreciate it."
Alex tilted his head, enjoying this a little too much. "Can you kneel down a bit while saying it? You know, show some real sincerity."
Laura's jaw dropped. "Alex, don't you dare push it that far."
He shrugged, rolling over to face the wall. "Then I'm going to sleep. Good night, sister."
A beat of silence. Then, the soft thud of knees hitting the floor. Alex turned back, his breath catching. Laura was kneeling beside his bed, palms flat on her thighs, the neckline of her dress dipping low enough to offer a tantalizing glimpse of her cleavage—the same breasts that had haunted him since the movie night.
"It's okay, sister," he said quickly, sitting up before things got weirder. "Let's go. Just remember—you owe me one. A big one."
Laura jumped up with a triumphant grin, dusting off her knees. "Yes! Wait, I'll be ready in five minutes—well, maybe ten. Just hurry up yourself." She headed for the door, then spun back. "And you should be properly dressed, okay? Don't embarrass me in front of my friends. And don't talk to them either—you don't have any manners. I guess all the protein in your diet only goes straight to your dick rather than your brain."
Alex's eyes widened. "What did you just say?"
"Nothing!" She flashed a wicked smile and slipped out.
Alex stared at the closed door, his mind racing. Should I even help this bitch?