Hey! This is my first time writing fanfiction so please don't judge! helpful criticism would be appreciated. (Four x tris, smut, 18+)

Warnings: 18+, post-trauma, unprotected sex (please don't do it... make sure to wrap it up first), mild choking

Abnegation was in shambles. Countless neighbors, friends, and loved ones swathed in grey lined the streets.

Symmetrical, cubic grey houses on either side of me were hardly visible through my watering eyes.

My soul hurt. My mother, ripped from me.

As the adrenaline from the fighting wore away, it was replaced by deep, stinging pain. So much loss over such a short amount of time.

I found my feet carrying me to my old house, same as the others, but different to me. Walking through the door and seeing the remains of the battle. Bullet holes left the door in tatters, and as I pushed it open I realized how much I had forgot about my home after transitioning into life in that cavernous rock. Dauntless had lived such different lives, and I had began to change to accommodate that lifestyle.

I was desperate to return to my old ways of life. The peace that I found in the monotony of giving and living simply was so far away, and missed the familiarity of that life. Of my mother.

Standing in my doorway, I looked around my childhood bedroom. A desk. A set of drawers. A bed. All grey, and only enhanced by the layer of dust that had settled upon everything. I had been so keen to find more flavor and excitement in my life that I had been oblivious to the comfort and security of life in abnegation.

A hand touched my shoulder.

I jumped, not quite recovered from the shocks of fighting. I noticed that my hand was rested on my gun, but upon hearing Four's voice I recovered quickly.

"Tris. I'm so sorry."

I turned around, instantly latching onto his blue, blue eyes.

His arms wrapped around my slender frame and I collapsed into him. I was sobbing, desperate for someone to depend on. I was so alone. I needed family, and so did he.

Locked in an embrace, we wept. Silently at first and slowly, ever so slowly, we let go. I don't know how long for, but we stood. Sobbing in great heaving gasps. So much loss. So much destruction.

I had ran out of tears to cry, and so did he. There was a numbness in the air. Looking around the room, I smiled in the slightest bit.

"Not what I had in mind for taking a boy home to mom and dad for the first time." I chuckled, waving at the holes in the walls, the quiet emptiness of my childhood home. The void that was my mother.

I walked over to my bed and sat down, patting next to me to indicate that he should sit down.

"You know, this is exactly what the layout of my house was, given that they're all basically the same." Four noted. "Except mine wasn't this quiet. It was always so... tense."

I nodded in response, and held his hand.

A moment came and passed.

I turned towards him and squeezed his hands.

"Four. I want you to know that you are family to me. You are strong, and capable, and gentle. You are not that... that monster that you lived with."

He stared at me for a moment, clenching his jaw, and slowly shutting his eyes and furrowing his brows in pain.

"You always have a home with me." I whispered.

His shoulders relaxed. He opened his eyes into mine, searching.

"I love you Tris." He said. Determination in his eyes.

I nodded once more. "I love you too."

He closed the space between us, lightly grazing my lips and then pulling back. He looked at me earnestly, silently asking if it was appropriate to kiss after such trauma. I pulled him in again.

I kissed away his sorrows, his pain. Being his stability, his rock to depend on. My breathing picked up. I needed him to know that I would be there no matter what. No matter the situation. His arms wrapped around me, and I held his face in my hands.

Slowly I pulled myself on top of him, not breaking our kiss as I straddled him. My hands pulled through his hair, and he moaned gently.

I pulled away, to look into his eyes for a moment. I needed to see him and for him to see me. To know and consciously make this choice together.

In one fluid motion he pulled off his shirt. I dove back into him. Desperate to feel something against me. Somebody against me. With me. I raked my fingernails up his back, pulling his beautiful tattooed body impossibly closer to me, and shakily breathing into his ear.

He hardened against me.

There was nothing stopping us. We fit so perfectly. Both so raw, so desperate for family. For love. And I let him fill that empty space.

I shoved him onto his back, holding his muscled, tan shoulders against the sheets. Pinning him under me, I deepened our kiss, and opened my mouth to him.

He pulled my shirt over my head, sitting up on his forearms and pressing his forehead into mine. His skin was hot and feverish, and he smelled of soap. I let his eyes consume me until I couldn't take it any longer and began pulling on his belt, unbuttoning his pants.

He breathed heavily, finally flipping over, me beneath him, sprawled out, my hair a mess. he pulled everything off as quickly as he could, as if he was dying with each second he wasn't in me. I squirmed, kicking my pants off.

He bent over me, his hands skimming my sides, knuckles brushing over my ribs, toying with the planes of my body. Slowly, he kissed my neck, sucking ever so gently, his teeth grazing my veins. I closed my eyes, arching my back. He pinned my hands above me, slowly moving down my neck. My breasts ached, my core on fire. He exhaled, and I moaned.

That was all it took.

He grabbed both of my legs, pulling me forwards and off of the pillows, my hair tangled above me. He toyed for a moment, brushing his cock over my clit, lining himself up.

I paused, holding my breath. Our eyes met.

"Is this... Okay?" he asked.

"it's just my first time. And intimacy isn't... the easiest. I'm afraid."

My memory of my final Dauntless test passed over me. Intimacy was scary, and I was putting myself on the line. I had already lost so much, and if I gave him everything, it would hurt so much more if he left as well.

"I understand. I haven't done this before either." he responded.

"I don't want to do this and lose you. It would break me." I whispered, eyes misting. "I'm scared."

"I won't ever leave you. I will do anything and everything in my power to keep you. You are my family, my love. You are mine." Four murmured.

"Promise?"

"Promise."

I nodded, sitting up into a deep kiss, mouth opened.

He slid in.

and in.

and in.

My core burned. My eyes and jaw clenched as I struggled to adjust. His length was impressive, and he filled me with several inches to spare.

As I stretched around him and began to accommodate his length, he started to rock slowly into me. Again, and again and again.

He gazed into my eyes, chest heaving, as if being inside of me was the essence of his life.

He increased his pace, the head of his cock brushing my g-spot over and over, relentlessly fucking me.

He picked up my legs, allowing him to push impossibly further into me, until with each movement his cock was pushing against my cervix, his fingers toying with my clit, matching the pace of his cock.

I threw my head back full with the ecstasy of him. His essence. My moans grew until I was sure that anybody outside could hear. And I didn't care. I wanted them to hear.

Four's bulging cock was twitching inside of me, his tattoos rippling as he fucked me harder. His hand snaking up around my neck, gently pressing my veins until my head pounded, so full of the feeling of him. Until it was too much for me to handle.

I climaxed, wetness pooling around me, dripping in ungodly amounts as I clenched around him, my walls fluttering. And I knew he could feel it.

My pleasure from him, from his cock was too much for him to handle, he slammed into me a dozen times like a piston, finally sheathing into me, his cock pressed against my cervix, as he emptied himself into me, shooting ropes of cum into my raw, unprotected womb.

We stayed like that for several minutes. Feeling the silence pressing in, gently trembling as he collapsed into me. Finally believing that we were not truly alone. We were in love. We were family.