How To Get Revenge On My Sister Who Stole My Husband - Chapter 1

Prologue: Fall

That day was the pinnacle of my happiness.

It was the day I married the man I loved, surrounded by blessings, as we pledged eternal devotion to one another.

But that night shattered everything.

The moment I opened the door to the bedroom prepared for our first night together, an unthinkable nightmare unfolded before me.

There, on the bed meant for us, lay my cousin, Danae Yusten, and the man who had just become my husband, Viscount Leonard Klein. Half-dressed, tangled in each other’s arms, they clung together in a lover’s embrace.

What… what was I seeing?

I stood frozen in the doorway, my eyes wide and vacant, my breath caught in my throat.

As if sensing my presence, the two who had just been whispering sweet nothings and exchanging tender kisses suddenly jolted upright.

Leonard turned to face me, his expression stricken, as if he’d seen a ghost. Danae, ever composed, calmly reached for her fallen garments.

I stared at them both, my gaze sharp and unyielding. Then, slowly, I parted my lips to speak.

“…What is this?”

“…”

“…Explain. Explain how this happened.”

I forced the words out, my tongue stiff from the shock. My voice trembled uncontrollably.

I demanded an explanation from the two people who had shattered me, struggling to maintain a semblance of composure. But Leonard said nothing his eyes dropped to the floor, lips sealed. Danae turned her head slightly and offered a strange, unreadable smile.

That was the final blow.

I snapped.

“I’m asking you, what the hell is going on here!”

“…Christine. Please, just calm down. This, it’s not…”

Leonard scrambled out of bed, his voice faltering. As he stepped toward me, I instinctively backed away, my body recoiling from his presence.

“Calm down?” I screamed. “Do I look like I can calm down right now?”

“Christine!”

“How could you? How could you two do this to me!”

My voice cracked with anguish as I hurled the words at them, my heart pounding like a war drum.

Danae, who had been silently watching the confrontation unfold, slowly rose from the bed. Her movements were calm, too calm. Then she spoke.

“Alright, enough. Do you really want the entire castle whispering that your husband cheated on you on your wedding night?”

“…What?”

Her voice was sharp colder than I’d ever heard it. It sliced through the air like a blade.

I stared at her, stunned. “What did you just say?”

Danae let out a short, bitter laugh. “You asked what’s going on? Fine. I’ll tell you. I’m in love with him.”

“…Ha? Since when?”

She tilted her head, eyes gleaming with something twisted. “It’s been a while. Maybe… three months after you started dating him officially?”

There wasn’t the slightest trace of shame or remorse in Danae’s voice. She spoke with brazen ease, as if her actions were nothing more than a passing whim.

I stared at her, speechless. My mind struggled to process the cruelty behind her words. Danae gave a casual shrug, her expression tinged with mockery.

“Oh, come now. Don’t look at me like I’m some heartless villain, sister. I simply loved this man and followed my heart. They say love and sneezing can’t be hidden, right?”

“…So you’ve been seeing him? All this time? Behind my back? While pretending to support me?”

“Pretending?” Danae smiled sweetly, her tone dripping with false innocence. “I was just being honest with my feelings. And so was Lenny.”

She reached out and gently stroked Leonard’s bare shoulder, her touch familiar and possessive. He didn’t flinch. He didn’t move. As if her presence beside him was natural routine.

The sight of it made something inside me snap.

“How could you do this to me? How!”

Danae sighed, her voice laced with irritation. “Ugh, you’re so loud. Honestly, calm down. Why are you acting so hysterical, sister?”

“…What did you just say?”

“Who told you to come back an hour early? If you’d just kept dawdling with those lowly maids, pretending to be kind like always, none of this would’ve happened.”

“Danae, you… You!”

I could barely form words. Her audacity left me gaping, stunned into silence.

She sighed loudly, deliberately as if my reaction inconvenienced her. Then she continued, her tone laced with disdain.

“And even if you did see us, you could’ve just quietly closed the door and walked away. But no, you had to turn it into a spectacle.”

“…I made the situation noisy?”

“Yes. Am I wrong? It’s not like I said I’m taking him from you right this moment, did I? And even if I did so what? Can’t you make that small concession for me, as your younger sister?”

“Danae!”

I shouted, my voice raw with disbelief. Her words were growing more twisted by the second. But she only smiled, amused by my outrage, and folded her arms with smug arrogance.

“That’s right. How much has our father given you over the years?”

“What…!”

“Who do you think raised you after the head of the family died and you were left all alone? Wasn’t it our father? If he hadn’t extended his hand, you’d be living like a low-ranking baron in some crumbling estate. You got to live as ‘the young lady of the Yusten family’ because of him. And I treated you properly as my sister.”

“…Ha.”

“So consider that debt repaid. Let me have this man. Isn’t that fair? Honestly, isn’t it a generous offer for someone in your position?”

At those words, a hollow laugh escaped me dry, brittle, and drained of all strength.

A benefit? She called it a benefit?

No. I had never gained anything from that so-called grace.

It was my uncle who profited. I had served as his advisor, crafting strategies in his name, eliminating his rivals, staining my hands with deeds he never dared to claim. He raised me, yes but only to use me. He never cared how many people I hurt, what kind of reputation I earned, or how deeply I buried my own conscience.

And now, Danae of all people was invoking the ‘favor’ of raising me?

I kept laughing. Quietly. Bitterly. The sound was hollow, almost deranged. It was absurd. Ridiculous. Miserable.

As the laughter spilled out, the fury that had been boiling inside me began to cool slowly, icily. In its place, a cold clarity settled in. I began to question everything I had done, everything I had justified in the name of love, loyalty, and family.

And for the first time, I saw it all for what it truly was.

Before I realized it, the laughter had stopped.

I looked Danae straight in the eye, her cold mockery still lingering in the air.

“Right. A great benefit… Maybe it was,” I said quietly. “But Danae, what should I do?”

“…?”

“I’ve decided. I’m ending that so-called beneficial deal.”

“…What?”

Her expression faltered. The smugness drained from her face, replaced by a flicker of confusion.

I turned my gaze from Danae’s frozen stare to Leonard, who stood motionless, his eyes vacant as if he couldn’t grasp what was happening. Then, without another word, I walked out of the bedroom.

My footsteps echoed down the corridor as I headed toward the stairs, toward my own room. But before I could reach them, a hand seized my wrist from behind.

Danae.

I yanked my arm free with force.

“Let go of me.”

“What are you going to do?”

“What?”

“You said you want to stop the beneficial deal. What does that mean? Are you going to betray our father?”

Danae’s voice trembled as she grabbed my wrist again, desperation creeping into her tone.

I looked down at her face, no longer smug, but anxious, uncertain.

“Well,” I said coldly. “Maybe I will.”

“You’re insane! Are you even in your right mind?”

“I’ve never been clearer,” I replied. “When dawn breaks, I’ll go to His Majesty the Emperor. I’ll tell him everything every scheme, every manipulation I carried out for Uncle.”

Danae’s face turned ghostly pale.

I shoved her hand away once more and turned toward the stairs, my steps resolute.

Then, behind me, I heard her voice low, shaken, almost a whisper.

“…You’ll ruin everything.”

“…You think anyone will let you do that?”

Her voice was low, ominous enough to send a shiver down my spine. I turned instinctively, goosebumps rising across my skin.

Danae stood there, her eyes locked onto mine, a cold smile curling on her lips. She began to approach, slowly, deliberately.

I backed away, unsettled by the eerie calm in her expression.

She giggled soft, mocking as if my fear amused her. Step by step, she closed the distance. I turned and fled into the empty bedroom next door, desperate to escape.

But she was faster.

Her hands clamped around my neck, fingers digging into my skin.

“Ugh!”

I clawed at her wrists, gasping, struggling to break free. But the more I fought, the tighter her grip became.

Her voice was ice.

“You’ve gotten bold, haven’t you? Acting up just because I’ve been lenient. You insolent thing.”

“…!”

“Did you really think you were something special? Just because people called you pretty and clever?” She leaned in, her breath cold against my cheek. “Don’t make me laugh. In the end, you’re nothing but a murderer.”

“Ugh… If I’m a… mur…derer… then Un…cle… is…!”

I gasped out the words, clawing at Danae’s wrists, desperate to stay conscious, to stay alive.

She looked down at me with a twisted smile, her voice dripping with mockery.

“That’s right. Our father is far worse than you. But do you know what his first murder was, sister? He killed his own brother.”

“What…?”

“Yes. Your kind, naive father, our dear uncle. You didn’t even know, did you? All this time, you were loyal to the man who murdered your own blood. Watching you devote yourself, stain your hands for him… it was truly entertaining.”

“That’s… that’s impossible…”

Danae tilted her head, her smile widening.

“Such a pity. I won’t get to enjoy that pathetic devotion anymore.”

And then her grip loosened.

My body lifted, weightless for a breathless moment.

She had pushed me.

I fell.

The wind roared past my ears, and the world blurred into streaks of light and shadow. Above me, Danae’s face appeared in the window, radiant and cruel.

Her voice echoed down, soft and mocking.

“Goodbye, sister.”

“Goodbye. You fool.”

With those words, my body struck the ground.

A sickening crack echoed through the courtyard, followed by Danae’s piercing scream.

“Kyaaaah! Sister! Sister!”

I could see her above me, shrieking with feigned horror as she leaned out the window. Her voice rang through the castle like a twisted alarm.

Pain engulfed me sharp, relentless, indescribable. My head throbbed violently, blood pouring from the wound where it had collided with the stone floor. I wanted to cry out, to beg for help, but my lips wouldn’t move. My voice was trapped inside me, drowned by agony.

“Wh-what happened, young miss?”

“What’s going on, Danae?”

“Sister! Christine sister jumped out the window!”

“What?”

Footsteps rushed toward me, voices overlapping in confusion and panic. Servants, guards, and Leonard, all drawn by the sound of Danae’s scream.

She sobbed dramatically, clutching her chest, her voice trembling with false grief.

“She was depressed… even before the wedding,” she said between sobs.

Leonard wrapped an arm around her, murmuring words of comfort as she buried her face in his shoulder.

And I lay there, broken, bleeding, watching the performance unfold.

I tried to scream at those detestable people but my mouth wouldn’t obey. My tongue curled inward, useless, as death crept closer. Tears of unbearable resentment spilled from my eyes, mingling with the blood streaming from my shattered forehead.

“…Ugh… ugh…”

My breath grew shallow, then slower… until it began to fade altogether.

Consciousness blurred. My mind unraveled into fragments memories flashing past like shards in a kaleidoscope. My joyful childhood. The day I lost my father. The uncle who took me in, who became my guardian.

I had given everything to earn his approval.

He told me that strengthening the family was my father’s dying wish. That my schemes were noble tools to punish the wicked, protect the empire, and honor our name. I believed him. I believed it all. And I devoted myself to that cause with unwavering loyalty.

And Danae?

She clung to me like a younger sister. She said she was happy to become family with Leonard, my fiancé. She said she was grateful for his love toward me and that’s why she wanted to treat him even better. Leonard, too, said he was glad to gain a little sister.

I was just happy that the two people I cherished most seemed to care for each other.

But it was all a lie.

Uncle had murdered my father. He used me nothing more than a pawn in his game.