Seducing My Sister's Husband after Betrayal

My hand froze inches from the door. I shouldn't eavesdrop. I should announce myself, pretend I hadn't heard anything. But something in his tone—something raw and desperate—kept me rooted to the spot.

"We don't have a choice anymore," Lucia's voice replied, fragile yet determined. "The doctors say I have months, maybe a year. Without a new heart..."

"I know, I know." Aiden's voice cracked with emotion. "I can't lose you. I won't."

I peered through the glass panel of the door, my breath caught in my throat. They stood by the window, Aiden's arms wrapped around my sister's waist, her head resting against his chest. The intimacy of their embrace was unmistakable.

"There's a way," Aiden said, his voice hardening with resolve. "Sophia's a perfect match. Same blood type, same tissue markers. The tests confirmed it."

"Aiden, no." Lucia pulled back slightly, but not entirely away. "She's my sister."

"And you're the love of my life." His words pierced my heart like shards of ice. "I married her because I had to, but it's always been you. It's only ever been you."

The cake slipped from my suddenly numb fingers, landing with a soft thud on the carpet. Neither of them heard.

"How would we even..." Lucia's voice dropped so low I had to strain to hear.

"I've been adding small doses to her food," Aiden replied, his tone clinical now. "Untraceable compounds that mimic heart failure. When she collapses, it will look natural. With your condition and your relation, you'll be the obvious recipient."

The world tilted beneath my feet. My husband and my sister, plotting my death. My heart—literally my heart—to be cut from my body and given to Lucia.

"Her heart for yours," Aiden whispered, pressing his lips to my sister's forehead. "A sacrifice I'm willing to make. For us."

I backed away from the door. The truth crashed over me in waves—every unexplained illness I'd experienced recently, every time Aiden had insisted on preparing my tea, every concerned glance from Elena.

He was poisoning me. Slowly killing me. And my sister was letting him do it.

They wanted my heart?

My husband wants to kill me.

I fled from Prescott Enterprises like a woman possessed, the gift box still clutched against my chest. My lungs burned as I gasped for air, tears blurring my vision as I stumbled toward my car. Once inside, I locked the doors and collapsed against the steering wheel, my entire body shaking.

"My husband wants to kill me."

The words echoed in my mind, too monstrous to fully comprehend. I pressed my palm against my chest, feeling the steady rhythm of my heart—my perfectly healthy heart that Aiden planned to cut out of my body and give to my sister.

A hysterical laugh bubbled up from my throat. All those unexplained dizzy spells, the fatigue, the occasional heart palpitations I'd been experiencing... not symptoms of stress as Aiden had suggested, but evidence of his methodical poisoning.

"Untraceable compounds that mimic heart failure," he had said so clinically, as if discussing a business strategy rather than my murder.

I started the car with trembling hands, needing to put distance between myself and that building, between myself and the two people who had betrayed me most completely. As I drove, fragments of memories flashed through my mind—Aiden insisting on making my morning tea, Lucia's concerned questions about my health, the way they'd exchange glances when they thought I wasn't looking.

How long had this been going on? How long had they been lovers? How long had they been planning my death?

I pulled over abruptly, bile rising in my throat. Leaning out of the car door, I retched onto the pavement, my body trying to purge itself of poisons both literal and metaphorical.

When the spasm passed, I straightened up and wiped my mouth. I reached for my phone and dialed Elena's number with newfound steadiness.

"Mrs. Prescott?" Her voice was tinged with concern.

"Elena, I need you to meet me at my parents' estate tonight. It's urgent." My voice sounded foreign to my own ears—harder, more commanding.

"Of course, but is everything—"

"Just be there," I cut her off. "And Elena? Don't tell anyone. Especially not my husband."

I ended the call before she could ask questions I wasn't ready to answer. Then I pointed my car toward the Sterling family estate, where I'd grown up in the shadow of Lucia's illness, where I'd learned to be the perfect, supportive sister to a girl everyone believed might die at any moment.

How ironic that after all these years of protecting her, she was now the one orchestrating my demise.

The Sterling estate loomed ahead, its elegant facade bathed in the soft glow of twilight. I composed myself as I approached, wiping away tears and pinching color back into my cheeks. No one could know what I'd discovered—not yet. Not until I had a plan.

My mother, Margaret, greeted me at the door, her perfectly coiffed silver hair and impeccable posture a testament to decades of maintaining appearances.

"Sophia, darling! What a lovely surprise." She embraced me, her signature perfume enveloping me in memories of childhood. "Is Aiden with you?"

"No, he's working late." The lie slipped easily from my lips. "I thought I'd come see you and Daddy. And Lucia, is she here?"

"In the sunroom, having her afternoon tea." Mother linked her arm through mine. "She's having one of her better days, thank goodness. The new medication seems to be helping."

I forced a smile that felt like glass cutting into my cheeks. "Wonderful."

The sunroom was awash in golden light, illuminating Lucia as she sat delicately on a wicker chair, a fine china teacup balanced in her slender fingers. She looked up as we entered, her face brightening with a smile that now seemed venomous to me.

"Sophia! What a wonderful surprise." She set down her cup and rose to embrace me.

I hugged her back mechanically, noting the frailty of her frame, the slight bluish tinge to her lips that betrayed her heart condition. As we pulled apart, I noticed the discreet medical monitor strapped beneath the sleeve of her cardigan—a constant reminder of her mortality that had shaped our family's entire dynamic.

"I was in the neighborhood and thought I'd stop by." I settled into a chair across from her, accepting the tea my mother poured. "How are you feeling?"

"Oh, you know, the usual ups and downs." Lucia waved a dismissive hand, though her eyes held a shadow I'd never fully recognized before. "Dr. Vale says I'm stable for now."

We fell into the familiar rhythm of small talk—discussions about charity events, mutual acquaintances, Mother's garden. I played my part perfectly, laughing at the right moments, asking appropriate questions, all while a storm raged inside me.

When the doorbell rang, Mother excused herself to answer it. The moment she left, a text message illuminated Lucia's phone on the table. I caught a glimpse of Aiden's name before she snatched it up, her fingers flying across the screen.

"Aiden checking in?" I asked innocently, watching her face for any sign of guilt.

"Just work stuff." Lucia slipped the phone into her pocket, but not before I noticed the slight tremble in her hand. "He's helping with some investments for my foundation."

"How thoughtful of him." I sipped my tea, wondering if it contained the same poisons Aiden had been feeding me. "You two have always been close."

"He's family," she replied, her eyes not quite meeting mine.

The conversation paused as we heard voices in the hallway. Moments later, Mother returned with none other than Aiden himself, his expression shifting from concern to surprise when he saw me.

"Sophia," he said, recovering quickly. "I didn't expect to see you here."

"Clearly," I replied, a new edge to my voice that made his eyes narrow slightly.

As he bent to kiss my cheek—a gesture that now made my skin crawl—I caught the look he exchanged with Lucia. Brief, subtle, but unmistakable in its intimacy.

In that moment, watching my husband and sister communicate silently over my head, I made my decision. They had taken everything from me—my marriage, my trust, and soon, they planned to take my life.

"Aiden, darling," I said, my voice honey-sweet as I placed my hand on his arm. "I was just telling Lucia about the charity gala next week. I think I'll need a new dress—something that will catch everyone's eye." I paused, my gaze sliding to my sister. "Something that will make hearts stop."