Unworthy Wife

Having long legs is a blessing, you can walk faster than shorties. But walking itself is tiring.

It took Sae-Joon fifteen minutes just to reach the nearest subway station, and from there, he headed to his neighborhood gym.

"Finally here."

The gym was exactly what you'd picture, weights clanking, sneakers squeaking against rubber floors, and upbeat music playing in the background for motivation.

Men and women were busy with their routines.

A few guys were recording themselves, striking poses for Instagram.

Sae-Joon stepped inside, his sharp eyes scanning the well-equipped facility.

It was bigger than he had expected, even though this was his second time here.

High-end machines, free weights, and a designated area for combat training.

A personal combat area. Meaning private rooms—locked from the inside.

A perfect location to fuck someone.

"No, I'm not a pervert. It's all the author's fault. That fucker deserves a thousand deaths."

Sae-Joon felt lighter now that he had cursed the author. He moved further inside—until a large, imposing man stepped into his path.

A hulking figure. Broad chest, thick arms, veins snaking over his forearms. He stood with a confident, almost territorial stance.

His shaved head and sharp jawline only added to his intimidating presence.

But it was also a little comedic—after all, he wasn't an American man who could pull off the bald look and still be imposing. Asian features were different.

The man gave Sae-Joon a once-over, his dark eyes sizing him up.

"First time here?" His deep voice rumbled.

Sae-Joon shook his head. "Second. I was here yesterday."

The man crossed his arms, his massive biceps flexing unconsciously.

"You serious about training? Or just another pretty boy looking for an Instagram pic?"

Sae-Joon smirked. "I don't take pictures."

The man exhaled, then extended his calloused hand.

"Geok Tae-woo. I own this place."

Sae-Joon took his hand. The grip was firm, dominant, almost testing.

"Sae-Joon. Han Sae-Joon. Third-year student. Nice to meet you."

Tae-woo nodded, then glanced toward the weight racks.

"You lift?"

"A little."

Tae-woo let out a short chuckle.

"We'll see."

It felt like a normal gym conversation—until Tae-woo's next question.

"Who's your trainer?"

Sae-Joon, still casual, replied,

"Yuri Noona. She's gorgeous. Didn't expect a gym in the countryside to have such a beauty."

The moment the words left his mouth—

The atmosphere shifted.

Tae-woo's expression froze.

His shoulders tensed, jaw setting in a hard line.

His eyes—just seconds ago filled with gym-owner confidence—darkened.

"...Yuri?" He repeated slowly.

"Yeah," Sae-Joon said, tilting his head. "Why?"

For a brief second, Tae-woo didn't answer.

Then, forcing a casual tone, he said, "Didn't know she was taking in male trainees."

Tae-woo knew that things weren't perfect between him and his wife, but to think she had even taken on a male trainee... and this kid had the nerve to call her beautiful?

Of course, she was beautiful. But it's not your turn to say it.

Tae-woo ran a hand over his shaved head, exhaling through his nose.

"Listen, kid. I don't know how or why you became her trainee, and I don't care if you're a student. Once, I beat seven men—trained fighters, all of them. You know why?"

"...How would I know?" Sae-Joon replied.

"Because they dared to touch my protein shake. Bastards drank it."

"...So you beat them over a protein shake?"

"No. I beat them because they touched what was mine."

Tae-woo's voice dropped, firm and unwavering.

"She's my wife. Keep that in mind."

Sae-Joon's smirk deepened.

Before he could respond—

A sultry, commanding voice interrupted them.

"Oppa, stop scaring my client."

Both men turned.

And there she was.

Yuri Nam.

Sae-Joon's breath hitched.

Hazel-eyed beauty. A flawless Korean face.

Her plump lips were slightly parted, as if she had just finished an intense workout.

Fuck.

Sae-Joon's cock twitched.

Tae-woo's jaw clenched.

"Yuri...Baby listen to me ...baby Stop"

Yuri didn't even glance at her husband. Instead—

She walked straight to Sae-Joon, grabbed his wrist, and pulled him toward the training area.

---

In front of her husband, Yuri pulled Sae-Joon deeper into the gym.

Her palm was warm, slightly damp with sweat—not unpleasant, but intimate.

Sae-Joon let his gaze roam: her messy bun, a few loose strands sticking to her flushed face… the way her tight sports bra struggled against her chest, lifting her breasts just enough to tease… those leggings sculpting every inch of her thick thighs, her round ass bouncing slightly with each step.

Damn.

Tae-Woo was still watching.

Sae-Joon didn't turn, but he smirked.

When they reached the weight section, Yuri finally let go.

She stretched her arms behind her back, arching slightly, pushing her chest forward, unintentionally, or maybe intentionally, flaunting her curves.

And because of that, Joon clearly saw two buds poking beneath the fabric. He wanted to twist those nipples, suck them until she cried.

Sae-Joon leaned in just enough and said,

"Noona… you know you look good today, right?"

Yuri paused—just a flicker of hesitation before turning to him, one brow raised, lips curling slightly.

"Oh? Do I? But I look good every day. What's new?"

He nodded deliberately.

"Yeah."

His eyes dragged over her body once more before locking onto hers.

"But it makes it real hard to focus."

And right now, he was hard—especially in his pants.

"Pfft… Haha."

Yuri let out a soft chuckle, tilting her head.

"Flirting already? You weren't this bold yesterday."

Sae-Joon smirked.

"Even yesterday, I was hard… I mean, it was hard to look at you."

Her eyes glinted with amusement.

"Oh? And why is it so HARD to look at a woman? Haven't seen one before?"

Sae-Joon shrugged, keeping his gaze locked on hers.

"I've seen plenty. But none like you, Noona."

Yuri smirked but didn't deny it. Instead, she patted his shoulder, fingers pressing a little too long.

"Then you better keep up today… unless you'd rather just sit there and stare?"

"Women like strong, manly men."

Sae-Joon exhaled through his nose, watching as she turned away, her hips swaying, ass moving in a way that made looking away impossible.

He followed her to the training room, grinning.

"This is heaven. I thank my god father, Author-nim, for letting me live in this world."

---

[Ding...

[ Yuri Nam's Corruption 21%]

[ Lust Guague: 13%]

---

Now that they were inside a private training room, Sae-Joon's mind was a battlefield of intrusive thoughts.

For a brief second, he considered buying lust pheromones from the system and just fucking this bitch right here, right now.

But he shook his head.

No.

As the proud son of my scum dad, I'd never stoop to mind control. Every bitch I take—I'll make them mine willingly.

Still, when he caught sight of Yuri tying her messy bun, exposing the delicate curve of her neck, the struggle became real.

She turned, hands on her hips, hazel eyes sharp yet teasing.

"So, Sae-Joon… what did you learn yesterday?"

She smiled—warm but sultry.

Sae-Joon rolled his shoulders, forcing himself not to stare at her tits.

Impossible.

Her sports bra hugged every sinful curve, pressing her firm, round breasts up just enough to taunt him.

A faint sheen of sweat clung to her skin, making the material stretch even tighter.

Fuck.

Clearing his throat, he looked away.

"That I'm still alive," he said, "and life is quite hard without strength."

Yuri chuckled.

She stepped closer.

Then another.

Too close.

Damn it, does she even want me to focus?

If not for his Passive Stat Generation, he'd seriously consider changing gyms.

Because who the fuck could train under a walking temptation?

"I'll admit, I expected you to collapse." She tilted her head slightly. "But you lasted longer than I thought."

Sae-Joon clenched his jaw.

He remembered yesterday's humiliation, lifting too much weight, nearly breaking his back just to impress her.

But why was she saying this so close?

Why could he smell her—sweat, musk, and something inherently feminine?

He swallowed hard.

"I like to exceed expectations."

Her lips curled.

"Oh? Is that right?"

She crossed her arms under her chest—lifting her already heavy tits just enough to make them even more unbearable to ignore.

His cock twitched.

"What about outside the gym, hero?" she mused. "Got a girlfriend waiting for you?"

Sae-Joon hesitated.

Was she… asking about my dating life?

He scratched the back of his neck. "No, not really."

Yuri arched a brow.

"Not really? Or do you just not want to tell noona?"

Her tone was playful.

But her eyes?

Wicked.

"You know… since we're inseparable now, I need to know if you're secretly pumping your protein in someone's name."

"..."

Masturbation?

Does she think I'm that pathetic?

Sae-Joon exhaled.

"There's a girl I like," he admitted.

He looked directly at her.

"She's… beautiful. Confident. Sexy as hell. Met her yesterday. A total fitness freak."

His lips twitched.

"But sadly… she's not interested."

Yuri's smirk faltered. Just for a fraction of a second.

She wasn't stupid.

Her tits didn't grow because of sunlight.

She knew exactly who he was talking about.

Me?

Her fingers brushed over her toned stomach as she hummed.

"Oh? Maybe you're just not trying hard enough."

Green light.

A married woman shouldn't be entertaining a younger man.

But she liked attention.

Especially from a younger cock.

Sae-Joon's cock twitched painfully in his shorts.

Yuri saw it.

And smiled.

"Let's focus on your workout," she said smoothly, walking over to the bench press.

She patted the seat.

"Lie down."

Sae-Joon obeyed, settling onto the leather bench.

His heart was pounding—and not from exertion.

He reached for the bar—

And froze.

Because the moment he positioned himself—

Yuri straddled him.

His breath caught.

Her thick, toned thighs framed his face, her hips hovering inches above his chest.

And when she leaned forward, placing her hands on the bar—

Her tits nearly grazed his face.

Fuck.

He could feel the warmth of them.

The thin material of her sports bra left nothing to the imagination—stiff nipples pressing against the fabric, her chest rising and falling slowly.

Big. Soft. Heavy.

He wouldn't be able to fit them in just one hand.

Yuri looked down, hazel eyes glimmering with something dangerous.

"You okay down there?" she teased.

Sae-Joon exhaled sharply.

His cock throbbed violently, pressing against his shorts—

And when she shifted slightly, her thighs barely brushed against it.

Yuri's gaze flickered down.

She saw it.

The twelve-inch tentpole straining against his shorts.

And she smirked.

"You're pretty excited," she murmured, "for someone who's supposed to be working out."

His fingers clenched around the bar.

"Not my fault, noona," he said, voice rough. "You're just too hot."

Yuri tilted her head.

Pretending to be amused.

But her hazel eyes darkened.

"You do know it's wrong to have these thoughts about a married woman, right?"

Sae-Joon smirked.

This is an NTR world.

What's wrong and what's right doesn't matter—

It's about who will cuckold whom.

His gaze flicked to her bare ring finger.

"If it's so wrong…" his voice dropped, teasing, "then why don't you wear your ring?"

Yuri stilled.

For the first time—she hesitated.

Then, slowly, she shrugged.

Her voice was light.

"It's annoying. Gets sweaty after."

A simple excuse.

But instead of moving away—

She leaned lower.

Her tits pressed against his forehead.

Even though he could handle the weight of iron, the weight of flesh made him hard.

His cock twitched violently.

Yuri felt it.

Her lips curled in amusement, her hips shifting slightly—

Just enough to graze his hardness again.

Sae-Joon hissed through his teeth.

"Noona…"

Her fingers traced along his forearm.

"Yes?"

His breathing was ragged.

"…you know I'm young—"

"Indeed… young," she replied.

"I could turn into a beast and jump on you."

"Oh really? You scared noona. What should I do?"

"Get your tits off me."

"What if I don't?"

She was a proud woman. Now that she was giving him a chance to acknowledge her massive advantage, how dare he refuse?

"…Wait… Noona, your husband might—"

---

[ Lust Guague: 77%]

[ Corruption: 45%]

---

Before he could finish—

She lowered herself further.

This time—

Her breasts fully rested against his forehead.

She whispered—

"Shh. Keep lifting."

Her butt brushed against his hard shaft, making it impossible for him to stay sane.

Sae-Joon clenched his teeth.

He'd thought about fucking this bitch senseless right here so many times.

But good things take time.

For now, the session ended earlier than expected.

---

But Yuri wasn't done with him yet.

She led him to the mat, dropping down with the effortless grace of a seasoned athlete.

Her legs stretched into a full split—hip flexors loose, thighs taut—the fabric of her leggings hugging every sculpted inch of muscle.

Sae-Joon sat across from her, legs extended. Sweat clung to his skin, muscles tense from the workout.

"Fold forward," Yuri instructed. "Keep your back straight, Sae-Joon."

"Noona!"

He leaned in, reaching for his toes—and that's when she moved.

A subtle shift.

Her thigh brushed against his.

---

[Ding! It has been detected that destiny woman Yuri Nam is eyeing the host's cock. Host's influence value +2.]

[Yuri Nam's Lust Gauge: 88]

---

Sae-Joon had wanted to fuck this noona from the start.

So, he wasn't exactly bothered.

If anything—he wanted to see where this was going.

But that didn't mean he'd stay passive.

His cock was rock hard—impossible to ignore—pressed against the soft curve of her thigh.

Damn it.

Why are you stretching on my mat?

That too, between my legs?

Aren't you a married woman?

Yuri's breath hitched.

At first, she only meant to tease him—a little touch, a little tension, nothing serious.

But ever since she felt his length during the pressing session, something had changed.

A strange heat had started in her chest.

She wanted to feel his cock again.

Twelve inches.

It was an unrealistically monstrous size.

She had measured it with her eyes before.

Even through his shorts, she could feel the sheer size of him—hot, pulsing.

A stark contrast to her husband.

When she thought about him—domineering, muscular, strong, imposing—yet weak where he shouldn't be…

She felt sad.

She bit her lip.

And then, a different thought slipped into her mind—

Could she even take something like this?

For a moment, she only stared at his legs.

Sae-Joon inhaled sharply.

He was frozen—watching, waiting.

Then, her hand slid between them.

Direct contact.

Fingers pressing over the thick ridge stretching against his shorts.

A firm squeeze.

Then—she stroked him.

Slow. Deliberate. From base to tip.

Sae-Joon sucked in a sharp breath.

What the hell is wrong with this woman?

But Yuri?

She pretended as if nothing had happened.

"Your muscles are stiff, Sae-Joon."

She squeezed again.

Just to feel him twitch.

"Too much tension in your hips."

Too much tension everywhere.

Sae-Joon clenched his jaw.

"…Noona."

His voice came out rough.

Yuri smirked. "Hmm?"

She sat back, stretching her arms above her head, her chest pushing forward.

The sweat-dampened fabric of her sports bra clung to her, highlighting the weight of her tits.

"Lie back," she ordered, shifting onto her knees.

Sae-Joon swallowed hard. "Why?"

Yuri's thighs flexed as she straddled him, pressing down—just enough to feel the thickness between them.

"Core work."

Her hips rolled.

Just enough to tease.

Not enough to give him what he wanted.

"Unless… you need to cool off first?"

This time, as she spoke—she squeezed his cock hard.

And it hurt.

Sae-Joon hissed. "What the fuck?"

What kind of woman does this to a man she's only met twice?

That too, when she has a husband?

'Sure..This is an NTR world.'

Women here will fuck anyone, except their lovers.

Of course, as a man, it was impossible for Sae-Joon to stay passive forever.

So, he decided—

To become the villain.

---

"Noona, you started this."

Yuri barely had time to react before her back slammed onto the cold mat, her breath punched out in a sharp gasp.

"S-Sae-Joon—! What the hell—?!"

She squirmed, trying to push him off, but he had already pinned her wrists above her head.

His grip was tight, controlling, making her body tremble beneath him.

"You grabbed my cock first, Noona. Now you wanna back out?"

"Sae-Joon, I'm sorry. Can you let me go?"

"...Not until I ruin your married cunt."

"...!!"

Her lips parted, a protest on the tip of her tongue—but where could desire be tamed now?

And then, his hand slammed inside her bra.

"Agghh~"

A choked cry escaped her.

His fingers groped her massive tits, but they were so fucking huge his palm couldn't even cover one.

He squeezed hard, flesh spilling between his fingers, slick with sweat, burning hot.

"Fuck… they're heavy," he groaned, kneading them, thumbs rolling over her stiff nipples.

"Noona, your tits are fucking huge. I'm jealous of your husband. That bald fucker gets to suck on these, damn it."

"D-Don't talk like that... agh~"

She shuddered, thighs twitching as his rough palms molded her softness, twisting, tugging, abusing the hardened peaks until shocks of pleasure coiled deep in her stomach.

"Ah—Sae-Joon—stop—!"

She didn't mean it.

And he fucking knew it.

His mouth latched onto her neck, tongue dragging up the salty heat of her skin before his teeth sank in, marking her.

A violent shiver wrecked her body.

And then, his other hand shoved past her leggings.

"Wait—!"

He didn't wait.

His fingers found her clit, rubbing slow, deliberate circles over the soaked fabric.

She was soaked.

He growled against her throat,

"Noona… your pussy's dripping."

"Ahh... Auggh~ Sae-Joon, don't say that!"

"Noona... Your husband isn't enough for you, is he?"

"Ahhh~~"

Yuri's thighs clamped around his wrist, body twisting, struggling—but every movement just made his fingers press harder.

"Fuck—why are you—"

Her words died the second his fingers pushed her panties aside.

Skin.

Bare, needy, swollen skin.

Then—he slid two fingers inside her.

Deep.

A loud, wet squelch filled the air as he pumped in slow, stretching her open, curling against her slick walls.

"Ahhh~!"

Her body locked up, breath shattering as heat exploded through her belly.

Her pussy clenched around his fingers, sucking them deeper.

"You like this, huh?"

His lips hovered over hers, breath hot and smug.

"Slutty, married pussy already squeezing me—"

She was falling apart.

The wet, filthy sounds of his fingers fucking her filled the empty gym, mixing with her ragged moans, the slap of palm against breast, the obscene squelch of her soaked cunt.

"Noona, keep it low, or else we'll get caught."

"Agggh~ Then stop it, you bastard!"

Sae-Joon realized it was impossible for him to stop.

And even more so for her to keep quiet.

Thinking through the situation, Sae-Joon came to a conclusion…

And soon, his tongue invaded her mouth, completely sealing it while coiling around her tongue.

And then—

Knock. Knock.

A voice rang from outside.

"Yuri? Baby, I'm really sorry. I shouldn't have said those things to your client. Let me apologize to him personally."

"Yuri... Yuri, why aren't you saying anything?"

For the first time, Yuri Nam felt two emotions at once—fear and excitement.

Tae-Woo.

Her husband was outside, calling for her—while she, a woman in her mid-thirties, let a school student pin her down, squeeze her breasts, kiss her lips, and violate her pussy.

"...I'm no longer a worthy wife."

---

( End Of This Chapter)