One's body is the only thing that truly belongs to oneself. Or so I used to believe.

Two weeks later, Nina and I were discharged on the same day. I was wheeled out, confined to a chair, while Nina—who had supposedly needed a wheelchair daily before—was now running and skipping like a child.

The moment the nurse pushed me toward the Lambert car, Nina stepped in front of me, blocking my path.

"Serena."

She pointed inside the vehicle, pouting in feigned innocence.

"Since I'm all better now, Dad had that ugly disability seat removed. Sorry, but there's no room for your wheelchair anymore."

I looked past her. Sure enough, the custom interior Father had once spent a fortune importing—specifically designed to accommodate a wheelchair—was gone. In its place was plush upholstery in a garish pink. Nina's favorite color.

The nurse behind me stiffened, gripping the handles in awkward silence.

"Oh, I completely forgot!"

Father hurried over, closing the car door before crouching down in front of me.

"I'm so sorry, Serena. Dad's been swamped lately and it slipped my mind. Tell you what—take the hospital ambulance home today. As soon as I have time, I'll buy you a car of your own. A brand new one."

A faint, humorless smile touched my lips.

"It's fine. No need. I won't be needing it much longer."

"Won't be needing it...?"

Confusion flickered through Father's eyes. "Serena, Dad doesn't understand what you mean."

"Exactly what I said. I simply won't have a use for it."

Joshua stepped forward, his hand coming up to stroke my hair. His touch was warm, but his eyes were unreadable.

"Our Serena is just saying she'll recover soon," he said smoothly. "Once she's well, we won't need wheelchairs or special cars." He turned to Father. "Right, Dad? You'll figure something out for Serena as soon as possible, won't you?"

Father let out a visible sigh of relief, nodding enthusiastically. "Yes, yes, of course."

Joshua took the wheelchair handles from the nurse. But before he could turn the chair, Nina rushed up behind him, latching onto his forearm.

"Joshua, I want you to sit with me."

She leaned against him, whining softly. "Sitting in the back with Mom and Dad is so boring. Since Serena can't come with us, you should keep me company. That's fair, isn't it, Brother-in-law?"

Joshua made a show of trying to dislodge her hand, though not hard enough to actually break her grip.

"Don't be difficult, Nina. Your sister isn't feeling well..."

"Go."

I cut him off. I didn't have the energy for their performance. I unlocked the brakes and pushed the wheels forward myself.

"Just go."

As the nurse wheeled me toward the waiting ambulance, I glanced back. Joshua scooped Nina up into his arms and carried her into the car. My parents stood by, beaming, their eyes full of doting affection for their fragile, precious daughter.

I was the only one looking away.

Once the ambulance engine roared to life, my phone buzzed. A message from Joshua.

[Serena, don't misunderstand. Nina has just recovered from a serious illness and her body is still very weak. Our parents are getting old and can't lift her, so I had to help. I'm the only one who could do it.]

I stared at the screen. Weak? She had been jumping around the parking lot moments ago.

[I know.]

I typed the two words and locked the screen. A sharp pain stabbed through my chest, and I pressed my hand against my heart, steadying my breathing. It didn't matter. I would be leaving soon anyway. Playing along with their little theater for a few more days wouldn't kill me.

Or perhaps, it would.

When I arrived at the Lambert estate, I looked up at the familiar facade. A month ago, I had left this house filled with hope, eager to build a life with the people inside. Now, staring at the same walls, a bitter taste filled my mouth. In just a few weeks, everything had changed. The house was the same, but the home was gone.

"Serena..."

Mother approached as the medical staff helped me down from the ambulance. She took my hand, pressing a small red sachet into my palm.

"This is a safety talisman. Mom went to the temple early this morning to pray for it specifically for you. Keep this on you at all times, and you won't encounter any more danger."

She closed my fingers around the fabric, her expression earnest.

"Hurry and take it, Serena. To get this, your mom performed the pilgrimage—three steps, one kneel; five steps, one bow. I've even been fasting for seven days just to ensure it's effective."

I looked down at the red talisman in my hand. A safety charm, from the woman plotting to carve out my heart to save her other daughter. The irony was so sharp it almost drew blood.

My gaze snagged on the knees of my mother's trousers.

The fabric was threadbare and gray with dust, worn completely through in the center. Beneath the frayed edges, raw flesh oozed blood.

A memory from when I was eight surfaced. That New Year, caught up in the excitement of the parade floats, I had forgotten to tell anyone where I was going. My mother had knelt in the family's Buddhist hall the entire night, praying for my return.

When I finally came back safe, she claimed she needed to fulfill her vow. She fasted for seven days, eventually fainting from exhaustion right there in the shrine.

Looking at her bleeding knees now, the ice around my heart cracked.

I tucked the blessing sachet into my shirt, close to my chest, and reached out to hold her hand.

"Mom, thank you."

"We're family—no need for formalities." Her voice trembled. "Just promise me one thing."

"What is it?"

"Nina just had major surgery. The sunny master suite... she still needs that room to recover."

My grip on her hand stiffened.

"But don't worry," she rushed on, "your father installed new heating in the basement. You won't freeze down there again—"

Clang.

The sachet slipped from my fingers. The metal pendant struck the floor with a harsh, final sound.

The part of my heart that had softened moments ago didn't just harden—it crumbled.

"You're the older sister," she pleaded. "You have to learn to yield to your younger sister."

I looked at her, expression blank.

"Mom, I never intended to fight Nina for it. Let her live there."

After dinner, the medication pulled me into heavy, suffocating sleep.

At midnight, a stabbing pain in my chest jolted me awake. My throat was parched. I dragged myself out of bed to find water, but as I approached the stairs, Nina's weeping drifted down from above.

"I don't want you to go back to her! What's so good about that basement? Is that woman really that special? She's a barren invalid without a uterus—a sickly wretch—yet you still think about going back to keep her company!"

"Nina."

A long sigh, then Joshua's voice floated out—gentle, husky, terrifyingly familiar.

"The only person I think about is you. I don't want to go back either. But if she discovers anything, what happens to your health?"

I froze in the darkness, hand gripping the cold railing.

"Your father made it clear," Joshua continued, voice dropping. "Your body can't survive without her blood. Not in this lifetime. I have to keep her happy and willing. If something happens to you in the future, she's the only one who can save you."

"But I hate it..."

"Be good. Don't worry. Every minute I spend with her, I'm only thinking of you."

"Joshua..."

Through the gap in the door, I saw Nina cup Joshua's face with both hands. She stood on her tiptoes and pressed her lips to his.

I retreated silently.

I sat in the cramped darkness of the basement for the rest of the night. The sounds of their pleasure filtering through the ceiling didn't stop until dawn.

Just as the sky grayed with morning light, the basement door creaked open. Joshua walked in, bringing the scent of the outside world—a lie to cover where he'd really been.

Seeing me on the floor, panic flickered across his eyes.

"Serena? When did you wake up?"

"Just now."

"Are you okay? You look pale."

He let out a subtle breath of relief and pressed his palm to my forehead. His hand was warm. It made my skin crawl.

"You have a fever. I'll get your father."

"No need."

I stopped him as he turned.

"I just need to be alone. Tell them I won't be joining breakfast." I kept my voice flat. "Go about your day. If I need anything, I'll call."

An hour later, Joshua's voice echoed through the door.

"Serena, Nina wants to visit the mall. We're all going with her. Be good and wait at home—I'll bring you a gift."

A cold smile touched my lips, unseen in the shadows.

"Go ahead, Joshua. I'll prepare a gift for you too."

Exchanging surprises was common in our marriage. He suspected nothing. I heard his footsteps retreat, laughing as he escorted Nina out the door.

Straight toward their destruction.

The engine of the car outside roared to life, a low purr vibrating through the silence of the driveway. I glanced down at the message lighting up my screen.

[Serena Lambert, the lab team is en route to extract you. We look forward to our collaboration.]

I fired off a quick confirmation just as the doorbell rang. I didn't hesitate. I cast one final, cold look at the house that had been my prison for over a decade—the place I had once yearned for during my lost years, only to find a den of vipers.

Without a backward glance, I walked out the door.

Meanwhile, at Capital City's premier luxury mall, Marcus, his wife, and Joshua were parading Nina around like a trophy.

Their arms were already laden with designer shopping bags. If Nina so much as glanced at a ten-thousand-dollar gown or a diamond bracelet, Marcus—usually a man of strict frugality—swiped his card without blinking.

Watching Nina skip ahead, vibrant and laughing, Mrs. Lambert beamed. She clung to Marcus's arm with a contented sigh. "Oh, Marcus. Look at her. Our precious girl can finally live like a normal person. Seeing her this happy... I could die right now with no regrets."

"Don't talk nonsense," Marcus scolded gently, though his eyes crinkled with affection. "We have a lifetime to watch her grow. We'll see her marry, have children, and we'll be there to spoil our grandchildren, too."

Joshua walked beside them, his gaze fixed on Nina with an intensity that bordered on obsession. Beneath the facade of a doting brother-in-law, a darker longing simmered. He couldn't claim her publicly, but seeing her alive—fueled by the sacrifice of another—gave him a twisted sense of euphoria.

They greedily drank in the moment, having completely erased me—their convenient spare parts—from their minds.

Ahead, a display of elaborate wedding gowns caught Nina's eye.

"Joshua, look!" She spun around and darted toward the bridal shop with a bright smile.

She was so focused on the dress that she didn't see the courier sprinting through the crowd. The collision was instant. He slammed into her, sending her sprawling onto the hard marble floor.

The color drained from Nina's face. She clutched her chest, gasping for air like a fish out of water, before collapsing completely.

"Nina!"

The three of them scrambled toward her in blind panic.

"Joshua! Call Serena immediately!" Marcus barked, dropping to his knees to check Nina's pulse. "Tell her Nina's critical. We need her blood now!"

Joshua fumbled for his phone, fingers trembling. He dialed my number, but the line was dead.

"Dad... the call won't go through!"

Marcus, usually the picture of professional composure, roared with sudden rage. "Then call the hospital! Have them drag her here if they have to!"

Joshua dialed while Marcus began emergency measures. Mrs. Lambert collapsed to the floor, hands clasped in frantic prayer.

Moments later, Marcus's phone buzzed. He snatched it up. "Speak!"

The nurse on the other end was sobbing. "Professor Lambert... Serena isn't here! She's gone. She left a note saying she's going somewhere you'll never find her..."

Before he could process the words, a familiar voice boomed over the mall's PA system, cutting through the noise and freezing the crowd.

"Nina, my dearest sister... tell me, is my heart working well for you?"

The voice was calm, haunting, echoing from every speaker.

"I'm leaving now. In the days to come, I hope you stay healthy. I hope you live a very, very long life..."