THE DEVIL'S VOW

The Vow

The wedding was set for three days later.

Isabella spent those seventy-two hours in a blur of preparation, her life dismantled and reassembled like a puzzle she no longer recognized. Lucian's team moved with military precision—lawyers drawing up contracts, security specialists sweeping her apartment for surveillance devices, a stylist arriving at dawn with racks of dresses she couldn't afford to look at.

"You need to sign here, here, and here." The lawyer—a severe woman named Patricia who reminded Isabella of a hawk—pushed a stack of papers across the conference table. "This is a standard prenuptial agreement. It protects both parties in the event of dissolution."

"Dissolution." Isabella picked up the pen, her hand steady despite the chaos in her chest. "That's a nice word for divorce."

Patricia didn't blink. "It's the legal term."

Isabella signed. The pen scratched against the paper, and with each signature, she felt another piece of her old life slip away.

She'd quit her job at the marine conservation nonprofit—a job she loved, a job that paid almost nothing but meant everything. Lucian had insisted, claiming her public profile made her too vulnerable. She'd argued, but in the end, he was right. The Vale Group knew where she worked. They knew where she lived. They knew everything.

Now, according to the documents she was signing, she was about to become Isabella Thorne. The name felt foreign, like a coat that didn't fit. She'd spent two years hating that name, hating the man who bore it, hating everything it represented.

And now she was going to wear it like armor.

"You'll need to move into the penthouse immediately," Patricia continued, sliding another document toward her. "For security reasons. Your brother will remain at Mount Sinai under Mr. Thorne's protection. A private security detail has already been assigned to his floor."

Isabella's pen paused. "Matteo doesn't know about any of this."

"He will. Mr. Thorne is meeting with him this afternoon."

"What?" Isabella's head snapped up. "He's meeting with my brother? Without telling me?"

Patricia's expression didn't change. "Mr. Thorne felt it would be better coming from him. Given your brother's medical condition, he wanted to minimize stress."

"Minimize stress?" Isabella stood abruptly, her chair scraping against the floor. "Matteo is nineteen years old. He's fighting for his life. And you're telling me Lucian is going to walk into his hospital room and explain that his sister is marrying a stranger to save their family?"

"That's correct."

Isabella was already moving toward the door.

---

She arrived at Mount Sinai forty minutes later, breathless and furious. The private security detail Lucian had mentioned was impossible to miss—two men in dark suits stationed outside Matteo's room, their eyes scanning the hallway with professional detachment.

"Ms. Rossi." One of them stepped forward, blocking her path. "Mr. Thorne is inside. He asked not to be disturbed."

"Move."

"I'm sorry, but—"

"I said move." Isabella's voice was low and dangerous. "That's my brother in there. I don't care what Lucian Thorne asked for. I'm going in."

The guard hesitated, then stepped aside.

Isabella pushed through the door—and stopped.

Matteo was sitting up in bed, his thin face pale but animated. He was laughing. Actually laughing, the way he used to before the diagnosis, before the treatments, before the fear had stolen his smile.

And Lucian was sitting beside him, still in his immaculate suit, his tie loosened and his sleeves rolled up. He was in the middle of some story, gesturing with his hands, his grey eyes warm in a way Isabella had never seen before.

"—and then the entire cake collapsed," Lucian was saying. "Fifty thousand dollars of fondant and sugar, all over the CEO of the hotel chain. My mother was mortified. My father thought it was the funniest thing he'd ever seen."

"I wish I could have been there," Matteo said, still grinning. "That sounds epic."

"It was legendary. My mother didn't speak to my father for a week."

Isabella stood frozen in the doorway, her anger dissolving into confusion. This wasn't the cold, calculating businessman she'd come to know. This was someone else entirely—someone human, someone warm.

Someone who had made her dying brother laugh.

"Isa!" Matteo spotted her, his face lighting up. "You didn't tell me your fiancé was so cool. He's been telling me stories about growing up in Manhattan. Did you know he once got arrested for climbing the Statue of Liberty?"

"He what?" Isabella looked at Lucian, who shrugged with a slight smile.

"I was fourteen. It was a dare."

"You're a terrible influence."

"Probably." Lucian stood, his eyes meeting hers. Something passed between them—an acknowledgment, maybe, or an apology. "I'll give you two a moment."

He walked toward the door, pausing as he passed her. His voice was low, meant only for her ears.

"He's stronger than you think. He'll be okay."

And then he was gone, leaving Isabella alone with her brother.

She crossed to the bed and sat in the chair Lucian had vacated. It was still warm.

"So," Matteo said, his eyes sparkling with mischief. "You're marrying a billionaire. When were you going to tell me?"

"I'm telling you now." Isabella took his hand, her voice gentle. "It's... complicated."

"Complicated how? He seems nice. And he clearly cares about you." Matteo squeezed her fingers. "He told me about the debt. About the people who are after us. About why he offered to help."

Isabella's heart clenched. "He told you everything?"

"Enough." Matteo's expression softened. "Isa, I know you've been carrying this alone for months. I know you've been scared. But you don't have to be anymore." He gestured around the room—the private suite, the expensive equipment, the security guards outside. "Look at this place. Look at what he's already done for us. Maybe... maybe he's not the villain you think he is."

Isabella stared at her brother, tears burning in her eyes. He looked better than he had in weeks—there was color in his cheeks, energy in his voice. Private care was already making a difference.

"You don't even know him," she whispered.

"Neither do you." Matteo shrugged. "But I know you, Isa. And I know you wouldn't marry him unless you saw something worth fighting for."

Isabella didn't have an answer to that.

---

The ceremony took place the next morning.

It wasn't a wedding—it was a transaction, executed with the cold efficiency of a corporate merger. A judge presided over a sterile conference room in the basement of Aethelred Tower, its walls grey and windowless. The only witnesses were Patricia, two security guards, and Maya, who had refused to let Isabella go through this alone.

"You look beautiful," Maya whispered, adjusting the collar of Isabella's simple white dress. "For a woman about to make a terrible mistake, I mean."

Isabella laughed nervously. "Thanks. I think."

The dress was one of the ones the stylist had brought—elegant but understated, the kind of thing a woman might wear to a nice dinner. Not a wedding dress. Not a celebration. Just... practical.

Lucian stood at the end of the room, waiting. He was wearing a dark suit, perfectly tailored, his expression unreadable. But when his eyes met hers, something shifted—a crack in the mask, a glimpse of the man beneath.

He looked... nervous.

The judge cleared his throat. "We are gathered here today to witness the union of Lucian Alexander Thorne and Isabella Maria Rossi..."

The words washed over Isabella like static. She heard them, but they didn't feel real. None of this felt real. She was standing in a basement, marrying a man she barely knew, promising to love and cherish and honor until death parted them.

Until death.

The thought sent a chill down her spine.

"...do you, Isabella, take this man to be your lawfully wedded husband?"

She looked at Lucian. He was watching her, his grey eyes steady, his expression open. Vulnerable, even. As if her answer actually mattered to him.

"I do."

"...do you, Lucian, take this woman to be your lawfully wedded wife?"

"I do."

The judge smiled. "Then by the power vested in me, I now pronounce you husband and wife. You may kiss the bride."

Isabella's heart stopped.

She'd forgotten about this part. The kiss. The symbolic seal of their union. She'd been so focused on the logistics, the security, the plan—she hadn't thought about what it would mean to actually kiss him.

Lucian stepped closer, his hand coming up to cup her jaw. His touch was gentle, his eyes asking permission.

"May I?" he murmured.

Isabella nodded, not trusting her voice.

He leaned in, and time seemed to slow. She could see every detail—the faint lines at the corners of his eyes, the slight tremor in his hand, the way his breath caught as he drew closer. And then his lips touched hers, soft and warm and impossibly gentle.

The kiss lasted only a moment—a brush of lips, a whisper of contact. But it felt like a thunderclap, a seismic shift in the foundations of her world. Her heart lurched in her chest, and for one dizzying second, she forgot where she was, forgot why she was here, forgot everything except the taste of him—coffee and mint and something deeper, something that tasted like longing.

He pulled back slowly, his eyes dark and unreadable.

"Congratulations, Mrs. Thorne," he said softly.

And Isabella realized, with a jolt of terror, that she was in way over her head.