The teasing had been relentless. Every damn day Tae found a way to slip into his house—some excuse about borrowing a tool, dropping off cookies her mom “made too many of,” or just “checking if he needed help unpacking.” And every time, she pushed it further. A flash of her bare pussy when she bent to pick something up, her tits spilling out of whatever skimpy top she wore, her hand brushing his cock “by accident” while reaching past him. Dirty little comments that left him hard and humiliated: “Bet you’d feel so good stretching me out, Uncle Kook,” or “Yuna doesn’t know what she’s missing— I’d ride you till you forgot your own name.” He’d stammer, blush, adjust his glasses, tell himself it was just her being young and playful. But it was eating him alive. His cock ached constantly, his dreams filled with her thick ass grinding on him, her fat pink pussy dripping. He felt guilty, ashamed, but he couldn’t stop the want.

That evening, the house was quiet. Yuna had texted she’d be late—again—some “girls’ night” that smelled like bullshit. Kook sat on the living room couch in the dim light of one lamp, elbows on his knees, face in his hands. His eyes were red-rimmed, glassy. He looked broken.

The doorbell rang soft. He dragged himself up, opened it, and there she was—Tae, in the tiniest black dress he’d ever seen. Straps so thin they looked like threads, neckline plunging so low her big tits were practically spilling out, hem barely covering her ass. No bra, nipples already poking through the fabric like little bullets. No panties—he could tell from the way the dress clung to her hips, outlining everything. Her white skin glowed in the porch light, pink lips glossy, eyes hungry.

“Hey, Uncle Kook,” she started, all flirty like always, stepping inside without waiting for an invite. But then she saw his face—really saw it. The teasing smile dropped. “Whoa… what’s wrong? You look like someone kicked your puppy.”

He shook his head, closing the door behind her. “It’s nothing. Just… rough day.”

She kicked off her heels by the door—bare feet padding closer—then sat right next to him on the couch, so close her thick thigh pressed against his. Her fat tits squished against his arm, soft and warm through the thin dress. She turned toward him, hand on his knee, voice soft now. “Bullshit. Tell me. Please.”

Kook swallowed, staring at the floor. His voice came out small. “I think… Yuna’s cheating on me. She’s been coming home late every night this week. Smells like cologne that isn’t mine. Different shampoo. Makeup smudged like she fixed it in a hurry. And when I ask, she just snaps at me, says I’m paranoid.”

Tae’s blood boiled. Who the actual fuck would cheat on him? This sweet, kind, stupidly hot man who worked his ass off, who never raised his voice, who looked at her like she was the sun even when he was trying not to. Anger flared hot in her chest—but underneath it, a dark little voice whispered: This makes it easier. This makes him mine.

She scooted closer, tits pressing harder against his arm. “That bitch,” she muttered under her breath, then louder, “I’m so sorry, Uncle Kook. You don’t deserve that. Not even a little.”

He rubbed his eyes, voice cracking. “I just… I wish I knew how to make a woman satisfied. Maybe if I wasn’t so… useless in bed, she wouldn’t have to look elsewhere. If I could just… be better.”

Tae’s jaw clenched. The hell she would let that bitch have him back. No. He was going to be hers—only hers. She forced a soft smile, eyes sparkling with something dangerous. “What if I taught you?”

His head snapped up. “What?”

“I could teach you,” she said, voice low and sweet. “Everything. How to touch, how to kiss, how to make a woman scream your name and beg for more. I’d show you exactly what feels good. No judgment, no rushing. Just… lessons.”

His eyes widened, hopeful for the first time all night. “Really, Tae? You’d do that? So I can… so I can fix things with Yuna?”

Inside, her anger flared again—fuck Yuna—but she smiled wider, all innocent on the outside. Oh, Uncle Kook, she thought. You’re gonna be mine. Not that bitch’s anymore. Never again.

She didn’t answer with words. Instead, she swung one leg over his lap, straddling him slow, her bare pussy settling right on the thick bulge already forming in his sweatpants. The dress rode up instantly, bunching around her waist, her fat ass cheeks spreading over his thighs.

Kook gasped, hands flying to her hips on instinct. “T-Tae—!”

“Shhh,” she whispered, pressing a finger to his lips. “This is just the start, Uncle Kook. Relax. Let me teach you.”

She started grinding—slow at first, rolling her hips in a filthy circle, her dripping pussy sliding over the outline of his cock through the fabric. Wetness soaked through immediately, darkening his pants. “Feel that?” she murmured, leaning in so her tits smothered his chest. “That’s how wet you make me. Every time I think about you, I get like this. Dripping. Ready.”

He groaned, head falling back against the couch. “Fuck… Tae, we shouldn’t—”

“Shouldn’t what?” She ground harder, faster, clit rubbing right against his shaft. “Shouldn’t let me show you how good it can feel? How a real woman rides cock? Yuna never did this for you, did she? Never soaked your pants just from grinding. Poor Uncle Kook… so neglected.”

His cock twitched hard under her, thickening, throbbing. She could feel every vein through the thin material. “God… you’re so big,” she moaned, rocking faster. “I can feel how thick you are. Bet you’d stretch my tight little pussy so good. Split me open. Make me cry.”

Kook’s hands gripped her hips tighter, not pushing her away—pulling her down harder. “Tae… oh shit…”

She smirked and pressed forward, smothering his face between her soft, heavy breasts in her dress. “Mmm, feel these? So full for you. Suck on them later, okay? But right now… grind back. Fuck up into me like you mean it.”

He moaned into her cleavage, hips bucking up instinctively, meeting her rhythm. The wet sounds of her pussy sliding on his clothed cock filled the room—filthy, obscene.

“I’m gonna teach you everything,” she panted, grinding so hard her clit throbbed. “How to eat pussy till I squirt on your face. How to finger me till my legs shake. How to fuck me from behind, slap my ass, pull my hair. How to cum inside me so deep I feel it for days. You’re gonna learn to make me scream, Uncle Kook. Not her. Me.”

His breathing was ragged, glasses fogging. “Tae… I’m—fuck, I’m close…”

“Me too,” she whimpered, reaching down to pinch her own nipples through the dress, then grabbing his hands. “Pinch them. Hard. Like you own them.”

He hesitated, flushed crimson, but obeyed—fingers finding her hard nipples through the thin fabric, pinching, rolling. Tae threw her head back, moaning loud. “Yes—fuck, yes! Harder!”

She ground down viciously, pussy clenching, dripping so much it soaked through his pants completely. Her orgasm hit like a freight train—body shaking, thighs trembling, a gush of wetness flooding over his cock. “Oh god—cumming—cumming on your big dick—!”

Kook groaned deep, hips jerking up one last time. He came hard in his pants, thick ropes pulsing against her, mixing with her cum, making everything slick and messy. “Shit— Tae—!”

They rode it out together, grinding slow now, aftershocks making them both twitch.

Finally, she leaned in, lips brushing his cheek—so close to his mouth she could taste his breath. “That’s just the beginning, Uncle Kook,” she whispered, voice wrecked. “I’m gonna teach you everything. Every filthy thing. And when I’m done… you won’t even remember her name.”

She kissed his cheek again—soft, lingering—then slid off his lap. Her dress fell back down (barely), pussy still glistening, thighs shiny with their mess. She looked down at the huge wet spot on his sweatpants—her cum, his cum, all mixed. “Look at that. Proof you can make a woman cum hard. Don’t forget it.”

Kook stared at the mess, breathing heavy, cock still twitching. “Tae… this was… just to learn, right? Nothing else?”

She smiled, sweet and wicked. “Of course, Uncle Kook. Just lessons.” She blew him a kiss, grabbed her heels, and slipped out the door.

He sat there in the dark, pants soaked, heart pounding, telling himself over and over: It’s just to learn. Just to get better. Nothing else.

But deep down, he knew he was already addicted.