"Deb," he uttered in surprise as he crouched in front of LaGuerta's unconscious form.

She stared at the sight in front of her in disbelief, her gun pointed at the ground, "Oh god. Dexter." She aimed the gun at her brother as he stood up and walked over to the barrel where he had placed his knife.

The knife he was going to use to kill the police captain. "Deb, you shouldn't be here."

"W-Why… shouldn't I be here?" Debra asked, her voice trembling slightly in fear. Fear of what Dexter was about to do. She knew, but refused to believe it. Tears began to well in her eyes as she glanced towards LaGuerta, who was still out. "What're you doing?"

"What needs to be done," he said. 'What needs to be done to protect you.'

Debra whispered, "Are you gonna kill her?"

"You need to leave, I need to finish this."

She looked at him with pleading eyes and voice, "Dexter, you can't."

"I can, and I will." Dexter might have let LaGuerta go if Debra wasn't involved in this. But she was. He was doing this for her.

Deb panicked, a nervous an uneasy smile on her face, "Jesus, fuck, no Dexter! You can't do this!"

A soft and short moan was heard behind him as both of them turned their gaze towards the now awake captain. Dexter turned towards her, "It's the only solution, the only way to end this."

"No, no, no, I can't let you go through with this!"

"Shoot him, Deb." LaGuerta suddenly said, her voice weak and exhausted. Dexter looked between the two of them, unsure of what Debra would do. "You have to end this. Shoot him."

Dexter's hand hovered over the knife before he gripped it. Debra noticed and quickly pointed her weapon back to him, "Stop!" He did.

"Do it, Debra. Shoot him." She glanced between the two, dreading the choices she had.

"Shoot him! This is not who you are. You are a good cop. You're a good person, you're not like him."

She sobbed lightly.

LaGuerta finally shouted, "Put him down!"

Dexter stared at his sister. Maria was right. She was so much better than him. And even though he never deserved her, he still had her. For his entire life, he had Debra Morgan. The kindest person he knew. A paragon and an example. Someone Dexter would have wanted to be like if he was ever to be normal.

And he had taken her for granted his entire life. He never truly realized how lucky he was.

He didn't deserve her.

"She's right," he stated. Debra looked at him in surprise. "It's true, everything she said. You're a good person… The best I know. It's okay." He threw the knife on the ground beside him before spreading his arms to his sides, as if inviting her to shoot him. "I should have died a long time ago… in that container with my mother."

Debra stared at him in disbelief. "No, no, don't say that, Dex! Jesus fuck!" How could he say that? Where would she be if it wasn't for him?

Dexter knew she was wrong. He never should have survived what he saw. He should have died. His death was long overdue, and if someone was going to do it, he'd like it to be Deb. "Do what you gotta do."

She sobbed again, this one jarring through her entire body. She couldn't. Not even if she wanted to. She couldn't kill her protector.

Not after he killed for her.


Several days ago

Dexter stared at Hannah as she slowly walked towards him. "Stay with me tonight," she whispered, placing her hand on his shoulder.

"No, I can't. I have something to do."

"You're going to visit Debra?" she asked with a false sympathetic smile. Dexter looked her in the eyes. She was lying to him right to his face. Pretending as if she didn't try to kill one of the most important people in his life. He shook his head. "Estrada?"

He shook his head again, his own false smile matching hers. "No, I postponed the deal with him. There's something else that needs to be done." He leaned to kiss her on her neck.

She giggled. "Be careful, naughty boy. Don't want Santa to give you coal for Christmas, do you?" She closed her eyes and leaned her cheek against his, exposing her neck. A perfect opportunity for Dexter. He slipped the syringe into her neck and she fell limp into his arms, "Wha- Dex…"

-oOoOoOo-

Dexter watched Hannah stir back into consciousness with a soft groan. She slowly began to realize where she was. Wrapped in plastic on a table, surrounded by plastic sheets and naked. Realization replaced confusion, "Dexter..?" She swallowed as tears began to form in her eyes.

He finally appeared in her line of vision. He wore the very same apron as last time. Why would he do it again? He seemed… sad, but not regretful. He knew he had to do this.

"Why are you… doing this?" She suddenly gasped as she felt the scalpel cut into her cheek.

"I promised her I wouldn't do this again. But I need proof." He sounded so cold and detached as he placed the blood on the slide and put it in his pocket.

She stared up at him in confusion, her cheek stinging, "Why, Dexter?"

"For my sister's safety." He stated. He walked out of her vision before returning with a knife in his hand, "I already killed my biological brother for her. What's one more person I like?"

"Dexter, I don't-"

He interrupted her, his voice still as cold. "She will never be safe as long as you're free to walk the streets."

She tried to protest again. "I didn't do anything-"

"I tested her water bottle. Anxiety drugs were dissolved into it."

She scoffed, tears coming out of her eyes, "You think I ha-"

"Stop lying!" he almost yelled, causing her to flinch. "It doesn't matter, there's no turning back from this. You might as well confess, since I'm doing this either way."

She stared at Dexter, tears pouring uncontrollably, "I… I did it for us. She wouldn't let you go." She pursed her lips together before uttering, "I love you, Dexter. I pro-"

Her voice stopped as she gasped, the blade piercing through plastic and flesh. She stared pleadingly into his eyes. But it was too late. A single tear escaped from Dexter's eye as he closed them. He couldn't watch her pleading eyes as all light faded from them.

He finally let out an anguished breath before backing up against the wall, staring at her lifeless corpse. His eyes wandered to the bone saw he placed on the table next to his other knives.

-oOoOoOo-

He opened the door to Debra's house, his sister following behind him, as they entered. He placed his bag on the couch table and Debra closed the door. She walked over to the sofa before sitting on it. There was something off about Dexter. He was unusually quiet. He almost seemed sad. It made Deb want to embrace him.

She stared at the ground in front of her. "You barely said two words on the ride home."

He stared at his sister's knees before saying, "I have something for you."

She looked at him, "A present? A new car, I hope."

He shook his head slowly, "No. Something… more important." Her eyebrows furrowed in confusion. "Close your eyes."

She complied. "Hold out your hand." She did rather hesitantly at hearing the sadness in his voice.

She felt something cold and small fall on the palm of her hand. She opened her eyes to see a bloodslide. Her eyes widened, "What the fuck?" She looked up at him, lips shaking, "D-Dex… What- Who… Who the fuck is this?"

"…Hannah McKay."

Debra breathed out a shaky breath, "Th-… That's Hannah?" He nodded. "Jesus Christ, Dexter. Did you… Did you kill her for me?"

He stared at her, "I had your water bottle tested. She dissolved your pills into the water."

She scoffed, voice quiet and trembling, "You killed someone you loved for me?"

He slowly wandered to the sofa opposite of hers and sat down, "I had done it before, I did it again, and I would do it a thousand times over if it meant you'd be safe."

Debra stared at him before swallowing the lump in her throat. "What do you mean… you've done it before?"

His eyes widened ever so slightly. His tongue must have slipped. He sighed. "Remember Brian? My brother?"

She stared into his eyes for a few seconds before realization hit her. "You killed Rudy? Why..?"

He hesitated, "He… He knew he could never replace you while you were still alive. He told me who he was, all the hookers he killed were set up for me. He wanted his baby brother back. But he couldn't, not while you were alive."

Deb's eyes were wide, her lower lip trembling, "And you killed him? Despite knowing he was your brother?"

Dexter smiled softly and sadly, "He accepted me for what I was. But there was something he didn't know."

"What?"

He stared at her, smile widening slightly, "There is no Dexter without Debra. You are one of the most important things in my life. You and Harrison are the only bits of humanity left in me. Without you… I'd be hollow. I wouldn't feel anything. Not even anger. Just an empty shell."

She looked at him, eyes filled with emotion, the most evident being adoration, "You killed your brother who accepted the darkness in you for a sister who didn't even know you? Why? I don't understand."

Dexter stood up, hands in his pockets, "You… You accept the darkness in me. Brian wanted the darkness only. But unlike him, you see the light in me. You bring it out- No… You are the good in me. You accept both sides, and you've struggled and sacrificed a lot of what you believe in to accept me. It was easy for Hannah. Lila wanted only the darkness and Lumen needed it. But you accept the whole me."

She stared at him, heart racing. He continued, "You don't only accept the dark passenger or the mask I put up. You accept Dexter Morgan."

"B-but you killed Brian before I even knew about your darkness."

"Like I said. Without you, I'd be hollow."

She stared at the ground. She was speechless. She finally whispered, "Thank you…"

Silence fell over them for a while. Dexter finally broke it, "Don't mention it."

He turned to leave. A smile on his face.

His sister was safe.


Present

Debra couldn't. He sacrificed so much for her. He killed for her.

Now it was time for her to kill for him.

She sobbed before tilting her head to the side, eyes blurry from tears that threatened to pour like a waterfall from her eyes, "…Dex…" She needed to see him. She needed to know he was there for her, that she wasn't alone. She couldn't be alone. Not after what she was about to do. She aimed her gun at LaGuerta.

And she pulled the trigger. Dexter jumped and looked behind him in shock and surprise as his eyes took in the sight of LaGuerta's bloody blouse, and closed eyes. He heard the clatter of Debra's gun against the ground and saw her running towards the captain's body before hugging the body tightly. As if it would pull her from this nightmare, undo everything and make things go back to the way they were.

She sobbed into LaGuerta's shoulders as she let out every single tear from her eyes. She felt Dexter's comforting hands on her shoulders. She pulled away from Maria's body, sobbing, before tightly hugging Dexter. She held onto him for dear life and let out her tears again as he ran his hand through her hair gently. She cried for what seemed like an eternity before she fell silent, her chin resting on his shoulder.

She lifted her uninjured hand behind Dexter's head to see LaGuerta's blood covering it. Crimson red. Debra suddenly saw something she never hoped she would see as she stared blankly.

She saw blood trickling down the back of her eyelids. The trickle became a stream. The stream became a flood of red. It filled her up. Suddenly the blood isn't red anymore. It turns pitch black as she closes her eyelids. She suddenly felt a pressure on her head. It felt like her head was about to explode.

And so, Debra Morgan's Dark Passenger was born.


Author's Note: Dun, dun, DUN! What did you think? Did you like it? I hope so. Either way, this fic is going to be a Debster fic. Finally Dexter will take on a pupil that won't betray him. There isn't really much to say except that this is my first fic. I've been reading for a while and decided to try my own hand at this.

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