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I Wasn't Supposed to Find My Brother's Best Friend's Filthy Journal
I Wasn't Supposed to Find My Brother's Best Friend's Filthy Journal

I Wasn't Supposed to Find My Brother's Best Friend's Filthy Journal

by Cecilia
20 Chapters
Ongoing
In this modern romance novel, a good girl discovers her brother's best friend’s dark secrets. Read I Wasn't Supposed to Find My Brother's Best Friend's Filthy Journal as Gunner claims her after a betrayal. This romance story explores obsession and dangerous desires online.

I Wasn't Supposed to Find My Brother's Best Friend's Filthy Journal Summary

While house-sitting for her older brother, Elara stumbles upon a hidden diary belonging to his best friend, Silas. The explicit entries reveal a dark, obsessive side to the man she thought she knew, blurring the lines between fear and attraction. As Silas returns and senses her shift in behavior, Elara is pulled into a dangerous game of cat and mouse. She must navigate a web of secrets and intense desire before his secrets consume them both.
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Chapter 1 of I Wasn't Supposed to Find My Brother's Best Friend's Filthy Journal

Ellie's POV

The afternoon sun was baking the front porch of my brother’s old house, the one I was packing up. Dust motes danced in the heat, and my boyfriend, Mark, was already back at our apartment in the city, cataloging books for his library job. I was alone, sorting through a box of my brother’s junk he’d left behind when he moved.

My fingers brushed against something leather-bound and heavy tucked between old motorcycle magazines.

Gunner’s Journal. The name was etched in clumsy, masculine script on the cover. My brother’s warning echoed in my head like a stubborn ghost. Stay away from Gunner. He’s trouble. A player. Girls cry on my doorstep because of him. I’d believed it. Every flirtatious comment Gunner had ever tossed my way—“If your bookworm can’t satisfy you, I’ve got a real engine that’ll purr for you, little sister”—had made me roll my eyes and walk faster.

But here it was. His private thoughts. A terrible, magnetic curiosity pulled at me. I sat on the dusty floorboards, the journal warm in my hands.

I opened it.

The pages were filled with a chaotic scrawl, notes about bike parts, sketches of engines, and then… the other stuff. The stuff. My breath caught, not in a hitch, but in a shallow, shocked pull. It wasn’t just crude. It was detailed. Vivid. Specific.

I want to feel her thighs wrapped around my waist, not in some soft bed, but against the cold metal of my bike seat, the engine vibrating under us. I want her to gasp not because it’s sweet, but because it’s raw, because I’m taking her somewhere she’s never let herself go. I want to hear her say my name, not whispered, but screamed into the night when there’s no one else around to hear how fucking good I make her feel.

I swallowed. The words were a physical shock. They weren’t about some anonymous girl. The description… the setting… it felt knowing. Intimate. A fantasy so precise it seemed to map onto a real person’s contours.

My skin prickled. Who was he writing about? The “her” was painted with a reverence that contradicted everything my brother said. This wasn’t just about getting a girl pregnant and leaving. This was about possession. About a specific, thrilling kind of surrender.

I flipped faster, my heart hammering against my ribs. More entries, more of the same. Fantasies of dominance, of control, but wrapped in a language of desperate, almost angry wanting. Then, near the end of the book, a single line, written yesterday, the ink fresh and dark.

I’d fuck her right here, on her brother’s porch, with the sun watching, so she’d never forget who owns the heat inside her.

The words burned into my vision. Her brother’s porch. This porch. My porch. A cold wave of understanding crashed over the heat of my shame. It wasn’t a random “her.” It was… could it be… me?

The logical part of my brain screamed. No. Impossible. Gunner was a flirt, a joke. He didn’t think about me like this. He didn’t write about me like this. But the line was there, undeniable, a secret thought spilled onto paper and left for me to find.

A heavy, rhythmic knock shattered the silence.

Three solid thuds on the front door, the sound of a fist, not fingers.

My body froze. The journal felt like a live wire in my hands. I couldn’t move. I couldn’t breathe.

The knock came again, louder. “Hey! Saw your car. You still here, Ellie?” His voice, Gunner’s voice, was rough and familiar, cutting through the thin doorwood.

Panic seized me. I scrambled, shoving the journal back into the box, burying it under magazines. My hands were shaking. I stood up, my legs unsteady. “I… yeah. I’m here,” I called out, my voice too high, too tight.

“Door’s locked. Let me in. I gotta grab some tools your brother said I could have.”

Tools. Right. My brother had mentioned that. In my panic, I’d forgotten. I walked to the door, my steps slow.

I unlocked it, pulling it open.

He filled the doorway. Gunner. Not just a man, but a presence. He wore a simple black t-shirt stretched over a chest that was broad and solid, jeans faded and tight across thighs that looked like they could crush steel.

His dark hair was messy, pushed back from a face that was too handsome for the reputation he carried. His eyes, a sharp, assessing blue, landed on me instantly. A slow, easy smile spread across his lips.

“Ellie,” he said, the name rolling out of him like a challenge. “Lookin’ good. All sweaty from packing? Must be hard work for a city girl.”

I crossed my arms, a defensive gesture I didn’t even think about. “It’s hot,” I said, my tone aiming for dismissive but landing somewhere near nervous.

“Yeah,” he agreed, his gaze not leaving my face. He stepped inside, the space suddenly shrinking around him.

He glanced at the box I’d just frantically rearranged. “Find anything interesting in your brother’s crap? He was a collector of weird shit.”

My pulse thumped in my throat. *Did he see? Does he know?_ “Just… magazines. Old stuff.”

“Hmm.” He didn’t look convinced. His eyes swept over me again, a lazy, thorough scan that felt more invasive than any touch. “You seem jumpy. Something got you spooked?”

“No,” I said too quickly. “I’m fine. The tools are in the garage. I’ll show you.”

I turned to lead him, needing to get away from that box, from the door, from the intensity of his focus. He followed, his boots heavy on the floorboards. The garage was dim and cool, smelling of oil and old concrete.

“Here,” I said, pointing to a shelf where my brother’s toolbox sat.

Gunner didn’t move toward it. He leaned against the frame of my car, his arms crossed, mirroring my earlier posture but with a completely different energy—one of relaxed, predatory confidence. “Mark still working at the university? The library?”

“Yes.” Why was he asking about Mark?

“Good for him. Stable job. Safe.” Gunner’s smile turned a fraction sharper. “Safe is good for some people. But you ever get bored with safe, Ellie? Ever feel like you need something… with more vibration?”

The words from the journal screamed in my head. The engine vibrating under us. This wasn’t a coincidence.

This was a test. A provocation. My face flushed, a hot, betraying warmth. “I’m not bored,” I managed, my voice weaker than I wanted.

“Sure,” he said, not believing me. He took a step closer, not toward the tools, but toward me. The space between us became charged, thick with the unspoken words from that leather-bound book. He looked down at me, his height overwhelming. “You know, I’ve seen the way you look at me sometimes. When I’m teasing you. There’s a spark there. Not just annoyance. Something… hotter.”

I couldn’t breathe. He’d fuck her right here. “I don’t look at you any way,” I whispered.

“You do.” His voice dropped, low and intimate in the garage shadows. “And I think about it. I think about what that spark could turn into if you ever let it catch fire.”

The admission, so close to the journal’s confession, slammed into me. This was real. The fantasy was real, and it was about me, and he was standing here, speaking it into the air between us. The sexual tension wasn’t a vague cloud anymore; it was a razor wire, tightening around my ribs, pulling me toward a heat I’d been warned against for years.

He finally moved, walking past me to the toolbox. He grabbed it, hefting it easily. As he turned back, his eyes held mine. “Your brother’s a good guy. He protects you. But protectors sometimes keep things locked up that want to be… ridden hard.” He gave me that smile again, a promise and a threat all woven together. “See you around, Ellie.”

He walked out of the garage, leaving me standing alone in the dim light, my body humming with a dangerous, unfamiliar electricity, the secret of his journal burning a hole in my conscience.

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