The CEO Don's Secret Mistress

SIENNA Early 2024... I pressed my white-knuckled hands against the marble bar counter, trying to steady the violent trembling in my knees. The music outside was deafening—a bass so heavy it vibrated through the soles of my heels while flashing neon lights blurred the crowded dance floor. But the chaos around me didn't exist. All I could see when I closed my eyes were the red, flashing numbers on my younger brother’s unpaid hospital bills. All I could feel was the suffocating weight of my mother’s last piece of legacy—her small shop—hanging by a thread because of my father’s sins. Ever since Mom died, our world has fractured. Dad chased his grief into the dark corners of underground casinos, betting money he didn't have, until he finally borrowed from the wrong man. A man whose name alone was a death sentence in Illinois. Now, we were living on borrowed time, waiting for ruthless debt collectors to show up at our door. I was entirely out of options. Even if I worked a dozen part-time jobs, I could never raise millions. My phone buzzed violently inside my cheap clutch. *Dad.* Taking a shaky, fracturing breath, I pressed it to my ear. “Dad.” “Sienna, it’s getting late. Where are you, sweetheart?” His voice carried that familiar, fragile trace of worry that made my throat tighten. “I won’t be home tonight,” I lied, the words tasting like ash on my tongue. “I’m with Alice. We’re pulling an all-night group study at a friend’s apartment.” My fingers shook so badly that I almost dropped the phone. It was the first time I had ever lied to him, and the guilt was like poison spreading in my chest. But he didn’t need to know the truth. He didn’t need to know that his daughter was standing in Chicago's most exclusive VIP lounge, preparing to sell her soul to save him. After a few brief, hushed words, I ended the call, tucked the phone away, and forced my spine to straighten. I had to do this. My eyes scanned the VIP boundary line, searching through the haze. And suddenly, the atmosphere in the room shifted. The messy crowd didn't just part— they actively shrank back the moment he walked in. Dark hair slicked neatly back, a bespoke charcoal suit tailored to an athletic, imposing frame, and features so fiercely striking they almost looked sculpted. The way he moved—calm, cold, and entirely purposeful—made the air rewrite itself around him. Lorenzo Moratti. One of Chicago’s most powerful, untouchable billionaires. He passed by my barstool without a single glance, flanked by a wall of heavy-set bodyguards as he headed straight for the private, velvet-curtained lounge. For a fraction of a second, his dark, bottomless eyes swept over the room. When they brushed past mine, my pulse tripped violently over itself. I tore my gaze away immediately, though my palms were sweating profusely. I could still walk away. But whenever I thought of my little brother—his pale face, his frail hands hooked to a maze of IV lines— my feet locked into place. I couldn't walk away. I stepped off the stool slowly, my legs felt unsteady beneath me, and walked toward the private lounge. At the entrance, two massive security guards instantly stepped into my path, cutting off the light. One scanned me with a cold, professional gaze while the other forcefully snatched my clutch to check for weapons. "Hands where I can see them," he growled in a low, threatening voice. "This isn't a public space, little girl. Turn around." My throat felt like a desert at that time. Before I could stammer an excuse, a deep, resonant baritone voice drifted from behind the heavy velvet curtain. “Let her in. She’s been staring at this doorway for a while. I want to know why.” The guards stepped aside without another word, their expressions turning blank. I didn't wait for another inspection. I slipped through the curtain before I could lose my nerve. The lounge was an entirely different world. The deafening bass of the club died a little, replaced by an eerie, luxurious vibe. The air smelled of rich cedarwood, high-end tobacco, and expensive whiskey. Lorenzo sat draped over a plush leather couch, his posture relaxed, but the aura he exuded was sharp, electrifying, and entirely stripped of warmth. Up close, his presence was truly suffocating. “You aren't the companion the manager promised,” he began, his long, ring-clad fingers slowly tracing the rim of his crystal glass. He didn't sound angry—which made the hairs on my arms stand on end. “I’m not,” I whispered, forcing the words past my frozen lips. He finally looked up. His knife-like gaze raked over my body, evaluating me like he was checking a piece of property. “Then what are you doing in my sanctuary, Bella?” My chest rose and fell unevenly under his scrutiny, but I didn't let myself look away. “I want to make a deal.” He leaned back into the leather, his dark eyes flashing with a dangerous, mocking trace of amusement. “A deal?” A dark smirk tugged at the corner of his lips. “What could a girl like you possibly offer a man like me?” “Anything,” I answered, taking a silent, shaky breath to anchor myself. “I’ll be your woman. Your mistress. Whatever you want. In exchange, I need my father's debt erased, and my brother’s medical care secured.” The rumors about Lorenzo Moratti's private life were whispers of dark indulgence in the city. Alice had warned me about the women he kept in his high-rise penthouse. I had built tonight's entire desperate gamble on those whispers. But looking at the icy, unbothered expression on his face, the tiny shred of hope in my chest began to wither. For a long, agonizing moment, silence pervaded the room—the kind of silence that crushes you. Lorenzo set his glass down on the marble table with a soft, final click. He rose to his feet, and the room instantly felt entirely too small. His tall figure loomed over me, the sheer breadth of his shoulders blocking out the ambient light of the lounge. “What is your name?” he asked as he stepped out of the shadows. “Sienna. Sienna Clarke.” He paused briefly. A tiny flicker passed through his eyes—something between recognition and suspicion. Before I was able to decipher it, his gaze turned to ice again. “Sienna..” he murmured, testing the syllables. “Age?” My heart skipped a beat. “Eighteen.” He let out a low, humorless snort, his eyes narrowing as he took in my trembling frame. “Eighteen years old and already trying to bargain with your soul.” “I don’t have a choice,” I challenged, tilting my head back to meet his gaze even as my heart thundered frantically against my chest. He stepped directly into my personal space, invading my senses with the scent of his expensive cologne. His large, warm hand reached out, his fingers gripping my chin to force my face upward. His touch felt like a live wire, sending a jolt of pure electricity straight through my blood. “You have no idea what ‘anything’ means in my world, Sienna," he said slowly while his thumb brushed roughly against my bottom lip. "It’s a very long way to fall.” I swallowed the lump of terror in my throat and looked straight into his dark, dangerous eyes. “Then burn me,” I whispered.