Table of Contents

Title Page

Copyright Page

Chapter One

Chapter Two

Chapter Three

Chapter Four

Chapter Five

Chapter Six

Chapter Seven

Chapter Eight

Chapter Nine

Chapter Ten

Chapter Eleven

Chapter Twelve

Chapter One

The sun was dipping low over the ocean as the minivan finally crunched onto the gravel driveway of the beach house. Lily stretched her legs, feeling the stiffness from the four-hour drive melt away with the first whiff of salty air. At 18, she was used to these family getaways—Mom, her stepdad Mark, and Alex, who she'd known since she was 12 when their parents tied the knot. But this year felt different. Maybe it was the way college loomed on the horizon, or just the humid breeze making everything stickier, more alive.

"Home sweet home for the next week," Mom chirped, popping the trunk. "Lily, grab your bag. Alex, help with the cooler."

Alex hopped out first, his t-shirt clinging to his back from the AC-less ride. Lily hadn't really looked at him like that before—not really. But damn, had he filled out? Those broad shoulders from all the swimming he did, the way his arms flexed as he hauled the cooler like it weighed nothing. She blinked, shaking her head. What the hell? He was her stepbrother. Family. End of story.

They unpacked in a flurry, claiming rooms in the rambling old house with its creaky floors and big windows overlooking the dunes. Lily's room was upstairs, a cozy nook with a twin bed and a view of the waves crashing endlessly. She tossed her duffel on the floor and flopped onto the mattress, staring at the ceiling fan whirring lazily. The place smelled like sunscreen and old wood, familiar and comforting.

Dinner was the usual chaos: grilled burgers on the deck, everyone talking over each other. Mark regaled them with bad dad jokes about seagulls, Mom laughed too loud, and Alex... Alex sat across from Lily, his knee bumping hers under the table by accident. Or was it? She glanced up, catching his eye. He smirked, that easy grin of his, and passed her the ketchup. "You gonna eat that burger or just stare at it, Lil?"

She rolled her eyes, but her cheeks warmed. "Shut up, I'm savoring it." Their fingers brushed as she took the bottle, and a weird jolt shot through her. What was wrong with her today? It was just Alex—goofy, annoying Alex who'd teased her about her braces back in middle school. But now, with his hair tousled from the wind and that faint stubble on his jaw, he looked... different. Grown up. Hot, if she was being honest with herself.

The conversation flowed around them: plans for beach days, maybe a hike, board games at night. Lily nodded along, but her mind kept drifting. She watched Alex's hands as he gestured, strong and veined, imagining them on her skin. Stop it, she thought, forcing a laugh at one of Mark's puns. This was ridiculous. Hormones or something. The ocean air messing with her head.

After dinner, they all scattered. Mom and Mark headed for a walk on the beach, hand in hand like newlyweds even after six years. Lily helped clear the plates, bumping into Alex in the kitchen. "Oops, sorry," she muttered, her hip grazing his.

"No worries," he said, his voice low, closer than necessary. He smelled like soap and salt. She darted away, heart thumping oddly.

Up in her room, she changed into a tank top and shorts, the fabric soft against her skin. The house was quiet now, just the distant roar of the surf. She lay on the bed, scrolling her phone aimlessly, but her thoughts kept circling back to him. Alex. Down the hall. Probably shirtless, lounging on his bed. God, why was she thinking like this?

She set her phone aside, letting her hand trail down her stomach. It was innocent at first, just scratching an itch. But then her fingers dipped lower, under the waistband of her shorts. She closed her eyes, picturing Alex's face, that smirk. What if he walked in right now? What if he saw her like this?

Her breath hitched as she touched herself, fingers circling her clit slowly. She was already wet—embarrassingly so. In her mind, it was his hand there, rougher, more insistent. "Lily," he'd whisper, his breath hot on her neck. "You want this?"

She arched her back, biting her lip to stay quiet. Her other hand slipped under her tank, pinching a nipple, sending sparks down her spine. The fantasy built: Alex pushing her legs apart, his toned body hovering over hers. She'd feel his hardness pressing against her thigh, thick and insistent. "Tell me you want it," he'd growl, and she'd nod, desperate.

Her fingers moved faster now, dipping inside her slick pussy, imagining his cock instead—long, veined, stretching her wide. She'd gasp as he thrust in, raw and deep, no holding back. The bed would creak under them, her nails digging into his back as he pounded harder, their bodies slick with sweat. "Fuck, Lily, you're so tight," he'd moan, his hips slamming against hers, filling her completely.

She rubbed her clit frantically, the pressure building, her hips bucking off the bed. In her head, Alex flipped her over, grabbing her ass, fucking her from behind like an animal. His hand would wrap around her throat, just enough to make her dizzy, while he whispered filthy things: "Come for me, sis. Come on my cock."

The orgasm hit her like a wave, crashing through her body. She clenched around her fingers, muffling a whimper into her pillow, thighs trembling. It was intense, more than her usual quick sessions. She lay there panting, sticky and spent, staring at the ceiling. What the fuck was that? Fantasizing about Alex? Her stepbrother?

Guilt crept in, but so did a thrill. It was just a fantasy. Harmless. Right?

A soft knock on the door made her jolt upright, yanking her hand free and smoothing her shorts. "Lily? You okay in there?"

Alex's voice. Her heart hammered. She swallowed, trying to sound normal. "Yeah, fine. Just... unpacking."

He paused, like he might say more, but then: "Alright. Night."

"Night," she echoed, listening to his footsteps fade down the hall.

She flopped back, a shiver running through her. His voice alone had her nipples hardening again. This vacation was going to be interesting.

The next morning dawned bright, the sun streaming through the gauzy curtains. Lily woke with a start, the remnants of a dream clinging to her—Alex's hands, his mouth. She shook it off, splashing water on her face in the tiny bathroom. Downstairs, the smell of coffee and bacon drew her in.

Mom was at the stove, flipping pancakes. "Morning, sleepyhead. Sleep okay?"

"Yeah, great," Lily lied, grabbing a mug. Alex was already at the table, scrolling his phone, wearing board shorts and nothing else. His chest was bare, tanned from summers past, a light trail of hair leading down to—

She averted her eyes, pouring coffee with shaky hands. "Hey."

"Mornin'," he said, glancing up. Was that a knowing look? No, couldn't be.

The day unfolded lazily: beach chairs, books, dips in the ocean. Lily tried to focus on her novel, but every time Alex dove into the waves, water sluicing off his muscles, her gaze wandered. By afternoon, they were all sun-kissed and salty.

That evening, after a simple pasta dinner, the family settled in the living room for a movie. Lily curled up on the couch, a throw blanket over her legs. Alex plopped down next to her, close enough that their arms touched. "This seat taken?"

"All yours," she said, her voice steadier than she felt.

As the film played—some rom-com Mom picked—the room grew dim. Under the blanket, Alex's hand brushed her thigh. Accident? She froze, but didn't move away. His fingers lingered, tracing a slow circle on her skin.

Her pulse raced. She glanced at him, but his eyes were on the screen, expression neutral. Emboldened, she shifted, letting her knee press against his. The touch was electric, innocent on the surface, but underneath...

The movie dragged on, but Lily barely registered it. Alex's hand inched higher, fingertips grazing the hem of her shorts. She bit her lip, heat pooling between her legs again. What was he doing? What were they doing?

When the credits rolled, Mom yawned. "Bedtime for me. You kids don't stay up too late."

"Night," they chorused.

Mark followed, leaving them alone. The tension thickened. Alex turned to her, his eyes dark. "You felt that too, huh?"

Lily's mouth went dry. "Felt what?"

He leaned in, voice a whisper. "Don't play dumb, Lil. I saw you looking."

Before she could respond, he stood, stretching. "See you tomorrow."

She watched him go, her body buzzing. Alone again, she headed to her room, locking the door this time. But sleep wouldn't come easy—not with the ache he'd stirred.

Stripping down, she slid under the sheets naked, the cool fabric teasing her sensitive skin. Her hand found its way between her thighs once more, slick and ready. This time, the fantasy was vivid: Alex bursting in, pinning her down, his mouth on her breasts, sucking hard enough to leave marks.

"Fuck me," she'd beg, and he would—slamming into her dripping cunt, each thrust brutal and deep, her walls clenching around his thick shaft. He'd flip her onto her stomach, spreading her ass cheeks, teasing her tight hole with his thumb while pounding her pussy relentlessly.

She came hard, fingers buried deep, imagining his hot cum filling her up, dripping down her thighs.

Gasping, she rolled over, spent but unsatisfied. This was just the beginning. Tomorrow... who knew?

 

Chapter Two

The morning sun was already beating down hard by the time Lily dragged herself out of bed, her body still humming from the night before. She couldn't shake the images—Alex's hands, his mouth, the way she'd imagined him taking her roughly. It felt wrong, but that wrongness only made her thighs clench tighter when she thought about it.

Downstairs, Mom was packing a beach bag with snacks and sunscreen. "Pool day today, kids! The beach is nice, but I want to lounge without all that sand."

Alex was at the counter, pouring coffee, wearing nothing but low-slung swim trunks that hugged his hips just right. His back was to her, muscles shifting as he moved. Lily's mouth went dry. "Morning," she mumbled, grabbing a yogurt from the fridge.

He turned, eyes flicking over her quickly. "Sleep okay?"

"Yeah. Fine." Liar. She'd barely slept, fingers slipping between her legs twice more before dawn, whispering his name into her pillow.

After breakfast, they all headed out to the pool behind the house—a big, sparkling rectangle surrounded by lounge chairs and tall privacy fences. Mark fired up the grill for later, Mom spread out a towel and cracked open a book. Lily hesitated in the doorway, heart pounding. She'd picked her bikini on purpose this morning: tiny red triangles that barely covered her tits, strings tying at her hips and neck. It was the skimpiest one she owned, bought on a whim last summer and never worn around family.

Alex was already in the water, slicing through it with clean strokes. He stopped when he saw her, treading water, eyes darkening as they roamed over her body. "Nice suit," he called, voice casual, but there was an edge to it.

"Thanks." She tried to sound breezy, walking to the edge and diving in smooth. The cool water shocked her heated skin, nipples pebbling instantly against the thin fabric.

They started innocent enough—splashing, racing laps, Mom laughing from her chair. But soon it was just her and Alex playing around while the parents dozed or read. He dunked her, hands on her shoulders, body pressing close underwater. She came up sputtering, shoving him back, but her palms landed on his hard chest.

"Truce?" he grinned, but didn't move away.

"Never." She splashed him full in the face, giggling as he lunged.

They wrestled playfully, bodies tangling in the shallow end. His hands "accidentally" grazed her thighs, fingers brushing the edge of her bikini bottoms. Once, his palm slid up her inner thigh, stopping just short of where she ached most. She gasped, eyes locking on his. He didn't apologize—just held her gaze, thumb tracing a slow circle on her skin before pulling back like it was nothing.

The air between them crackled. Every touch lingered a second too long, every laugh hid something hungrier. Lily's pussy throbbed, slick despite the water. She wanted his hands higher, rougher. Wanted him to pin her against the pool wall and—

"Lunch!" Mark called from the grill, breaking the spell.

They climbed out, dripping. Lily wrapped a towel around herself, but Alex's eyes followed, devouring the way the wet fabric clung to her curves.

After eating—burgers and chips under the shade—they all scattered again. Mom and Mark headed inside for a nap, complaining about the heat. "You kids behave," Mom teased.

Alex smirked. "Always."

Lily lingered by the pool, pretending to dry off. The changing cabana was a little shed off to the side, with separate stalls for guys and girls, but a shared bench area in the middle. She grabbed her bag and slipped inside to rinse off the chlorine.

The shower was lukewarm, soothing her flushed skin. She peeled off the bikini, letting the water run over her naked body, hands soaping her breasts slowly, pinching nipples that were still hard from his touches. God, she was worked up.

Then she heard it—the door creaking, footsteps. Alex's voice, low, thinking he was alone. "Fuck..."

She froze, peeking through the slats of her stall door. He was in the men's side, but the partition didn't go all the way up. She could see him from the waist down at least—no, wait, there was a gap higher too if she crouched a bit.

He'd stripped off his trunks, cock already half-hard, thick and heavy in his hand as he leaned against the wall. Water ran over him as he stroked slowly, head tipped back.

"Lily," he groaned softly, voice rough. "Shit, those tits in that bikini... wanna bury my face in them."

Her breath caught. He was jerking off to her. Right now.

His hand sped up, grip tight, foreskin sliding over the swollen head. Precum beaded at the tip, mixing with the water. "Fuck, yeah... your little pussy, so wet for me. Bet you'd taste so sweet."

Lily's hand slipped between her legs without thinking, fingers circling her clit as she watched. He was big—bigger than she'd imagined—veins standing out, balls drawn tight.

"Gonna bend you over, Lil," he muttered, pumping faster. "Slide into that tight cunt... make you scream my name. Stepsis or not, you're mine."

The words hit her like a spark. She rubbed harder, biting her lip to stay quiet, imagining him doing exactly that—fucking her raw, no protection, filling her up.

Alex's hips bucked, a low growl escaping. "Come on my cock... yeah, just like that..."

His cock jerked, thick ropes of cum shooting out, splattering the shower floor as he milked himself dry, whispering her name again and again.

Lily came with him, knees buckling, fingers plunging inside her soaking hole as waves crashed through her. It was intense, filthy, watching him lose it over her.

He finished, rinsing off quickly, still breathing hard. She stayed hidden until he left, towel around his waist.

Heart racing, she dried off and dressed in shorts and a tank, no bra—nipples poking through on purpose now.

Outside, he was lounging on a chair, sunglasses on, acting cool. She dropped onto the one next to him, close enough their arms brushed.

"Hot in there," she said innocently.

He glanced over, smirking faintly. "Yeah? You take a long shower?"

"Long enough." She leaned in, voice a whisper. "Heard some interesting things."

His body tensed. "Oh yeah?"

"Mmm. Sounded like someone was thinking about me." Her hand rested on his thigh under the towel he'd draped over his lap, feeling him twitch already.

Alex swallowed, voice low. "Can't help it. You in that bikini... fuck, Lil."

"I liked it," she admitted, fingers tracing higher. "Hearing you say my name while you... you know."

He groaned softly. "This is fucked up."

"Is it?" She met his eyes. "Because I want it too. Bad."

They stared, the air thick with it—the admission hanging between them.

"I want you," he said finally, rough. "All of you. Even if we shouldn't."

"Me too." Her heart pounded. "But not here. Not yet."

He nodded, hand covering hers, squeezing. "Soon."

The rest of the afternoon dragged, charged glances across the pool, accidental brushes that weren't accidental. By dinner, Lily was aching again, pussy wet just from sitting near him.

That night, in bed, she touched herself thinking of his cock, his words. Tomorrow, she'd push further. They both knew it.

 

Chapter Three

Lily couldn’t sleep. The house was dead quiet except for the low hum of the ocean and the occasional creak of old wood settling. Moonlight spilled through her curtains in silver strips, painting her bare legs as she lay on top of the sheets, nightie twisted around her waist. Every time she closed her eyes she saw Alex in that shower—head thrown back, fist pumping, her name on his lips like a prayer and a curse all at once.

It was past two a.m. when she finally gave up. Her heart was already racing as she slipped out of bed, barefoot on the cool floorboards. She didn’t bother with panties; the thin cotton nightie was all she wore, hem brushing mid-thigh. The hallway felt endless, shadows thick, but she knew exactly which door was his—second on the left, the one with the faint glow underneath from the charging light on his phone.

She turned the knob slowly, praying it wouldn’t squeak. It didn’t. The room smelled like him: salt, sunscreen, and something warmer, masculine. Alex was on his back, one arm flung over his head, sheet kicked down to his hips. He wore only boxer briefs, the fabric tented slightly even in sleep. Moonlight carved sharp lines across his chest and stomach, highlighting every ridge she’d been daydreaming about.

Lily shut the door behind her with the softest click. Alex stirred, eyes fluttering open. For a second he looked confused, then recognition hit and his gaze sharpened, hungry.

“Lil?” His voice was rough with sleep. “What the hell are you doing?”

She didn’t answer with words. She crossed the room in three quiet steps and climbed onto the bed, straddling his thighs before he could sit up. The heat of his skin through the thin sheet made her breath catch.

“I couldn’t stop thinking about you,” she whispered, leaning down until her hair curtained around them. “About what you said in the shower.”

His hands came up instinctively, settling on her bare thighs, thumbs stroking slow arcs. “You heard all that, huh?”