The evening sun dipped low over the city, painting the Kim mansion in strokes of molten gold as Tae pulled into the driveway, his Porsche humming to a predatory stop. Yoongi’s words still echoed in his skull like a siren’s call—seduce her, break him—twisting the raw fury from that afternoon into something sharper, darker. Something delicious. He killed the engine, gripping the wheel until his knuckles ached, those piercing eyes narrowing at the front door. Inside, Mimi would be fluttering around like the angel she was, oblivious to the rot festering under her roof. Namjoon? Probably holed up in his study, dick still twitching from the memory of Koo’s sloppy seconds, smug as ever. Not for long, Tae thought, a smirk ghosting his full lips. I’m gonna carve you out of her, piece by filthy piece. Make her beg for the son instead of the father.

He slipped inside quietly, the house humming with domestic normalcy—Mimi’s soft laughter from the kitchen, the clink of glasses. “Taehyungie! You’re home early—dinner’s almost ready!” Her voice wrapped around him like a balm, and he forced a grin, dimples flashing as he leaned in the doorway. She was chopping veggies, apron tied over her dance leggings, hair in a messy bun that made her look younger than her 43 years. God, she was beautiful—soft curves, kind eyes, the heart of everything good. Tae crossed the room in two strides, wrapping her in a bear hug from behind, chin on her shoulder, inhaling her warmth. “Smells amazing, Mom. Miss me?”

She giggled, leaning back into his solid chest, his muscles a comforting wall. “Always, baby. Rough day?” Her hand patted his forearm, tracing the veins that snaked under his skin.

Tae hummed noncommittally, pressing a kiss to her temple before pulling away. “Just the usual. College grind.” Lies, all of it—but for her, he’d swallow fire. He grabbed a beer from the fridge, twisting the cap with a flick of his wrist, biceps flexing under his tight black tee. Upstairs in his suite, he locked the door, stripping down to nothing but his thoughts. Naked, he was a fucking Adonis: 6’2” of rippling perfection, broad pecs dusted with dark hair trailing down to washboard abs, that deep V arrowing straight to his cock—thick even soft, hanging heavy between tree-trunk thighs, balls full and low. He paced, phone in hand, the rage-fueled boner from earlier long faded into calculated hunger.

First things first: intel. Tae dropped onto his bed, sheets cool against his bare ass, and fired up his laptop. Koo Designers’ site was a p*rnographic fever dream—pages dripping with models in barely-there outfits, sheer fabrics clinging to sweat-slick skin, captions like Own the Night. Own the Fuck. He dug deeper, cross-referencing her Insta (private, but he had ways—old family pics from Mimi’s stories), LinkedIn for schedules, even a quick hack into the gym app his dad sponsored (perks of the family name). Routine pieced together like a puzzle: mornings at the flagship store, afternoons schmoozing investors or “lunch meetings” (yeah, right—Namjoon’s calendar synced to the family cloud, the idiot), evenings at Éclat Gym—a high-end spot for the elite, all mirrored walls and pulsing bass. Tuesday and Thursday cardio blasts, he noted, smirking. Perfect. Grocery runs at the upscale Lotte Mart on Fridays—fresh produce for her “health kicks,” per a casual post. And brunches with Mimi, always Sundays.

Tae leaned back, cock stirring as he pictured her: those massive tits bouncing on a treadmill, fat ass flexing in yoga pants, pink pussy lips camel-toeing through spandex. Mine to ruin. He stroked himself lazily, pre-cum beading at the slit, but stopped short—save it for the game. By midnight, plan locked: accidents, teases, build the heat until she craved him. For Mimi. For the payback. Sleep came slow, dreams filthy with swinging breasts and muffled moans.

Two days later—Thursday—Éclat Gym thrummed with the low roar of treadmills and clanging weights, air thick with sweat and privilege. Tae arrived “on a whim,” gym bag slung over one shoulder, dressed to kill: gray tank that hugged his pecs like a lover, shorts riding low on his hips, exposing that sinful V. His body glistened already from the warmup jog outside, muscles pumped, every step a flex of quads and calves. Heads turned—women biting lips, men averting eyes—but he zeroed in on her. Koo, mid-workout on the mat section, oblivious in her Koo Designers active set: a cropped sports bra that barely contained her DD tits, nipples poking through like beacons, and high-cut shorts that rode up her thick thighs, the fabric wedged so deep her ass cheeks spilled out, plump and inviting. She was doing lunges, form sloppy on purpose maybe, sweat trickling down her cleavage, raven hair in a high pony that swished with each dip.

Tae’s cock thickened instantly, straining his shorts as he “stumbled” into view, dropping his bag with a theatrical thud. “Aunt Koo? No way—whoa, small world.” His voice was velvet thunder, deep and teasing, those midnight eyes locking on hers as he sauntered over, all 6’2” of godlike frame towering. Up close, she was even more devastating: full lips parted in surprise, caramel skin flushed from exertion, that fat ass popping as she straightened.

Koo blinked, straightening with a laugh that went straight to his groin—husky, surprised. “Taehyung? God, you’ve… grown up.” Her eyes flicked down involuntarily, tracing the ridges of his abs, the bulge tenting his shorts. At 40, she was a queen of composure, but something in his stare—predatory, playful—made her thighs clench. Mimi’s boy? Flirting? No idea he knew her dirtiest secret, she chalked it up to youthful charm. “What brings you here? Mimi didn’t mention.”

Tae grinned, dimples lethal, stepping closer—close enough for her to smell his clean sweat, feel the heat rolling off him. “Just blowing off steam. College is kicking my ass. You look… fuck, Aunt Koo, you look sexy today. Like, owning this place.” The word sexy dripped from his lips innocent-like, but his gaze raked her body, lingering on the sweat-slick valley between her tits. She flushed, a pretty pink blooming on her cheeks, pussy tingling under those shorts—what the hell? He’s half my age.

“Flatterer,” she teased, fanning herself, but her nipples hardened visibly, straining the bra. “Need a spot? I’m just finishing legs.”

Jackpot. Tae’s eyes lit, feigning helpfulness. “Hell yeah. Let me—squats next? Your form’s killer, but I could tweak it.” He positioned behind her as she dropped into stance, hands hovering at her hips—big, warm palms brushing her skin like fire. “Wider stance, yeah? Arch that back… like this.” He pressed in, his bulge—now rock-hard, thick as her wrist—grinding subtly against her ass crack through the thin layers. Fuck, she gasped inwardly, feeling the heat, the girth, her fat pussy lips swelling, juices soaking her shorts. He was a vision—tall, muscled god, face inches from her ear, breath hot. “Good girl—deeper now. Feel that burn?”

Koo bit her lip, thighs quivering not just from the exercise, doing the slutty pose he guided: ass out, tits thrust forward, back bowed like she was begging to be mounted. His hips rolled “correcting” her, cock nestling right against her cleft, the head nudging her clit through fabric. “T-Tae… you’re, um, handsy,” she murmured, voice breathy, flushed crimson as her body betrayed her—nipples aching, pussy clenching empty.

He chuckled low, pulling back just enough, bulge brushing her thigh as he stepped aside. “Sorry, Aunt Koo—gotta get it right. You make it look easy. Bet you turn heads everywhere.” His eyes dipped to her tits, innocent wink. She was a mess, core throbbing, excusing herself to the locker room after with a shaky smile, fingers itching to rub one out. Mimi’s son? God, what am I thinking? But the wetness between her legs said otherwise.

Friday evening, Lotte Mart buzzed with weekend shoppers—fresh produce gleaming under lights, air crisp with citrus and earth. Tae “ran errands” for Mimi, basket in hand, scanning aisles until—bam—there she was, Koo, in casual sin: a sundress so tiny it was criminal, floral print hugging her curves, hem flirting with her ass, no bra because of course, tits bouncing free with each step, dark nipples shadowing the fabric. He “bumped” her cart at the eggplant display, bodies colliding soft—his chest to her back, hand steadying her elbow.

“Whoops—Koo? Again? Universe is conspiring.” Tae’s laugh rumbled, deep and disarming, as he righted her cart, bodies too close in the aisle. Up close, her scent—vanilla and musk—hit him like a drug, cock stirring in his jeans.

She laughed, flustered from the gym memory still fresh, pussy giving a traitorous flutter. “Taehyung! You’re everywhere. Stocking up on… veggies?” Her eyes darted to the produce, trying to play cool, but his presence—tall, handsome, that lazy smirk—made her feel exposed, like he could see the damp spot on her thong.

Tae leaned in, plucking a massive eggplant—thick, veined, purple perfection—holding it up with a wicked glint. “Yeah, gotta stay… nourished. This one’s huge, huh? Reminds me of—well, you know.” He winked, voice dropping to that filthy-innocent timbre, eyes flicking to his crotch then back. “Bet you’ve got one waiting at home that matches. Thick, ready to… fill a girl up.” He tossed it in her cart, fingers brushing hers, lingering.

Koo’s breath hitched, cheeks burning as she imagined it—his young cock, bigger than Namjoon’s, stretching her. Stop it—he’s Mimi’s kid. But her pussy wept, thighs slick. “Tae! You’re terrible,” she swatted his arm, but laughed, heat pooling low.

He wasn’t done, grabbing a watermelon next, hefting it with ease, biceps bulging. “This? Dead ringer for those gorgeous tits of yours, Aunt Koo. So full, juicy—bet they taste sweet as hell, heavy in my hands.” His gaze dropped blatant to her chest, where her nipples pebbled under the dress, the globes straining. She crossed her arms instinctively, but it only plumped them up, making her flush deeper, clit throbbing.

“Kim Taehyung, I oughta tell your mother,” she scolded half-heartedly, but her voice was husky, body leaning into the tease. He grinned, stepping closer, breath on her neck as he reached past for a peach—plump, fuzzy, perfect curve.

“Nah, this is more you from behind. That ass—god, so ripe, begging to be squeezed, bitten.” He pressed it to her hip lightly, the soft give mimicking flesh, his free hand “accidentally” grazing the underside of her breast. “And down here?” He snagged a strawberry—plump, pink, glistening—holding it to her thigh under the cart’s edge, voice a whisper. “Your pussy must be just like this. Fat, pink, so wet and sweet—dripping for a taste. Am I close?”

Koo’s knees buckled, a soft whimper escaping as arousal flooded her—panties soaked through, fat lips parting slickly. He’s joking, right? Innocent flirting. No clue he knew, that this was revenge foreplay. She snatched the strawberry, popping it in her mouth, juice dribbling her chin. “You’re gonna get me in trouble, kid. Keep that imagination in check.” But her eyes sparkled, body humming, wet and wanting as they parted—her checkout line a haze of what-ifs.

A week blurred by in Tae’s calculated orbit: stolen glances at family dinner (Namjoon droning about stocks, Koo “dropping by” for wine with Mimi, all polite smiles while Tae’s foot “brushed” her calf under the table, making her spill a drop of red). The barbecue invite came casual—Mimi’s text to Koo: Sunday grill-out! Family only, but you’re family. Bring that fire dessert? Koo arrived like temptation incarnate: a tiny white sundress, cotton so thin it was sheer in the sun, no bra or panties because slutty was her brand. The fabric clung to her sweat-damp skin, tits heavy and free, nipples dark smudges; hem barely covering her ass, a breeze away from flashing that pink paradise.

The backyard was paradise—pool sparkling, grill smoking with ribs and corn, Mimi in a flowy maxi dancing between guests (a few studio friends), her laughter music. Namjoon manned the tongs, all CEO charm in linen shirt, but Tae saw the flicker—his eyes devouring Koo as she hugged Mimi, tits mashing soft. Civil, they played it: “Koo, darling, the rosé?” Namjoon poured, hand lingering on hers; she simpered, “Joonie, always the host.” Tae watched from the lounge chair, disgust churning—fucking hypocrites—but inside? A smirk burned. Enjoy it while it lasts, Dad. She’s gonna choke on my cock soon.

Koo bent for a napkin from the low table—ass up, dress riding high—and fuck, there it was: fat cheeks parted, pink pussy peeking, lips puffy and glistening in the sunlight, a hint of cream from the morning’s “shower thoughts” (Namjoon’s quickie call). Her tits dangled too, swinging heavy, nearly spilling out the scoop neck. Tae’s cock surged, thick and insistent in his swim trunks, tenting obscenely. He rose fluid, “helping” by stepping behind her—hips aligning, bulge grinding her cleft for a heartbeat, the head nestling right against her hole through the thin barriers. “Whoops—got it,” he murmured, voice low for her ears only, free hand “steadying” her waist, thumb dipping to trace her hipbone.

She jolted, pussy clenching on nothing, a fresh gush wetting her thighs. Tae—god, so big. Straightening, she shot him a wide-eyed look—flushed, lips parted—but he just grinned innocent, handing the napkin. “Careful, Aunt Koo. Slippery out here.”

Dinner dragged deliciously: under the fairy lights, plates of grilled meats and salads, Mimi beaming at her “family.” Tae sat across, foot teasing Koo’s ankle, sliding up her calf when no one looked—Namjoon too busy pontificating, Mimi refilling drinks. His toes nudged her inner thigh, brushing the edge of her soaked folds; she clamped legs, biting a moan into her steak, clit pulsing. What is with him? Innocent touches piled: brushing her arm for the salt, fingers lingering on her knuckles, knee pressing hers under the table—each spark building the ache, her pussy a throbbing mess, nipples so hard they chafed the dress.

As Mimi hugged her goodbye at the gate—“Love you, bestie! Next dance class?”—Koo slipped into her car, body on fire, no clue the storm brewing.

Midnight found Tae in his suite, lights dim, body oiled and posed in the full-length mirror—naked glory on display. Cock in hand, he stroked slow, the beast fully hard: 9 inches of veined thickness, flushed deep red, head mushroom-swollen and leaking ropes of pre-cum, balls drawn tight. For you, slut. He snapped the selfie—torso down, abs glistening, V sharp, dick the star: angled to show the curve, the drip, caption blank. “Wrong send,” he’d claim. Thumb hovered over her number—pilfered from Mimi’s phone—then hit send. Heart pounding, he waited, stroking lazy as the read receipt pinged.

Across town, Koo lounged in her penthouse silk robe, post-shower glow fading into unsatisfied throb from the day. Phone buzzed—Taehyung? The pic loaded, and she gasped, thighs snapping shut on a flood of heat. Holy fuck. His body—muscled perfection, that cock… thicker than Namjoon’s, longer, leaking like it hungered. Her pussy clenched violently, fat lips parting slick, clit swelling as she zoomed, breath ragged. Meant for someone else? But her fingers dipped low, circling the ache, imagining it splitting her, breeding her deep. Juices coated her thighs, robe falling open as she rubbed frantic—tits heaving, moans echoing. Tae… god, yes. She came hard, gushing over her hand, body arching—wetter than ever, craving the real thing.

Tae’s phone lit with her typing—Wrong number? 😳—but he smirked, cock twitching. Hook set. Reel you in, Koo. Then destroy him.