Stepbrother's Filthy Sex Toy

Lena's POV

My tits squished against the hard mahogany desk, nipples scraping the wood with every brutal snap of his hips. Sweat slicked down my back. My engagement ring dug into my palm where I gripped the edge, that stupid diamond flashing like it was laughing at me.

Marcus had one hand twisted in my hair, yanking my head up so I had to stare at us in the mirror. His other hand gripped my hip hard enough to bruise. His cock stretched me open, thick and relentless, pounding so deep my toes barely touched the floor.

"This pussy doesn't belong to that loser anymore, sis." His voice came out low and rough, right against my ear. "It's mine now. And I'm gonna breed it until you forget his fucking name."

I bit down on my lip so hard I tasted blood. "Fuck you, Marcus."

He laughed, dark and low, and slammed in harder. The wet slap of skin on skin filled the office. My walls clenched around him even as I cursed him in my head. Traitor body.

---

It started the second I walked through the door with Alex.

The house smelled the same, like polished wood and money. Marcus stood in the foyer like he owned the world, which he basically did. Tall, broad, that tailored black shirt stretched across his chest. His eyes landed on me first, then slid to Alex like he was something stuck to my shoe.

"Nice catch, Lena," Marcus said, not even bothering to smile. "College ball player. How original."

Alex stiffened beside me. "And you're the stepbrother she told me about. The one who thinks he runs everything."

I grabbed Alex's arm. "Come on, babe. Let's drop our bags."

But Marcus's gaze stayed on me the whole time. Heavy. Knowing. I'd felt that stare since I was eighteen, back when our parents first married and everything got complicated. I'd spent the last few years running from it. College. Parties. Alex. Anything to pretend I wasn't that girl anymore.

Alex went upstairs to shower. I thought I was safe for five minutes.

Then my phone buzzed.

*My office. Now. Or everyone sees the real you.*

My stomach dropped. I knew better than to ignore him. Marcus always followed through.

I stormed in ready to rip his head off. He sat behind that massive desk, laptop open, spinning it toward me without a word.

The video started playing. Me. Three years ago. That party I barely remembered. Drunk, laughing, on my knees with my top off while two guys took turns. My face clear as day. Moaning. Begging for more. Cum dripping down my chin.

I slammed the laptop shut. "Delete it. Right now."

Marcus leaned back in his chair, calm as ever. "No."

"You can't do this." My voice shook but I stepped closer anyway. "I'm engaged, Marcus. Mom and Dad think I'm finally getting my shit together."

He stood up slowly, towering over me. "You came home waving that ring around like it changes anything. It doesn't. You still belong here. To me."

"Like hell."

His hand shot out, grabbed my waist, and suddenly I was bent over the desk. My dress shoved up around my waist. Panties ripped down my thighs. I heard his belt, then his zipper.

"Stop—" The word died when he pushed inside me in one hard thrust.

We both groaned. He was so thick. So deep. My pussy fluttered around him, wet already from the twisted adrenaline.

"Still so fucking tight," he muttered. One hand fisted my hair again. The other reached around to rub my clit. "Fight me all you want, Lena. This cunt knows who it wants."

I tried to push back but only managed to take him deeper. "I hate you."

"Good." He pulled out slow, then drove back in, grinding against my ass. "Hate me while you cum on your stepbrother's cock."

The mirror across the room showed everything. My flushed cheeks, my mouth open, tits spilling out of my dress. Marcus behind me, shirt open now, muscles flexing as he fucked me like he owned every inch.

He spanked my ass hard. The sting bloomed hot. I cried out, clenching around him.

"Look at you," he said, voice rough. "Cheating already. Does pretty boy Alex know what a slut his fiancée is?"

"Shut up." But my hips rocked back to meet his thrusts. My body didn't care about the hate. It only wanted more.

Marcus leaned over me, chest to my back, lips brushing my neck. "Tell me if it's too much, baby. Say the word and I'll stop."

The softness in his voice right then, buried under all the filth, made something crack in my chest. I hated that too.

"Harder," I spat instead. "If you're blackmailing me, at least make it worth it."

He growled and gave me exactly what I asked for. His fingers worked my clit faster, rough circles that had me shaking. Every thrust hit that spot inside that made my vision blur. The desk creaked under us. My knees trembled.

I came without warning, pussy gushing around his cock, a broken moan tearing out of me. Marcus didn't slow down. He fucked me through it, whispering filthy praise against my skin.

"That's it. Good girl. Milk me just like that."

My arms gave out. I collapsed against the desk, cheek on the cool wood, ass still up for him. He kept pounding, deeper, harder, balls slapping my clit.

"Gonna fill you up," he rasped. "Gonna breed this cheating pussy until it takes."

I should have told him no. Instead I pushed back, chasing the next wave building inside me.

When he came, he buried himself to the hilt and stayed there. Thick pulses of heat flooded me. So much cum it leaked out around his cock, dripping down my thighs.

We stayed like that, panting. My heart hammered against the desk. His hand loosened in my hair, turned gentle. He stroked my back.

Then he pulled out carefully. I whimpered at the loss. He turned me around, lifted me onto the desk like I weighed nothing, and reached for a warm cloth from somewhere. He cleaned between my legs with slow, careful strokes.

His forehead pressed to mine. "You did good, Lena."

I wanted to shove him away. Instead my fingers curled into his open shirt, holding on while my body still shook.

A sharp knock on the door froze us both.

"Lena? Babe, you in there?" Alex's voice, worried. "I can't find you anywhere."

Marcus's lips curved against my neck. His hand slid between my legs again, pushing some of his cum back inside me. It made a wet sound that felt obscene.

He whispered, hot against my ear, "Answer him, sis. While my cum is still dripping down your thighs."

My eyes widened. I shook my head, but he just smirked and pressed two fingers deeper, curling them.

"Lena?" Alex knocked again.

I swallowed hard, throat tight. "I'm... I'm here. Just talking to Marcus about... family stuff."

My voice sounded wrecked. Breathy. Marcus's fingers kept moving slow inside me, thumb brushing my oversensitive clit. I bit my lip to hold back a moan.

"Everything okay?" Alex asked through the door. "You sound weird."

Marcus leaned in and bit my earlobe gently. "Tell him you're fine," he breathed. "Tell him you'll be out soon."

I squeezed my eyes shut. "Yeah. Fine. Give me... five minutes."

Alex paused. "Alright. I'll wait downstairs."

His footsteps faded.

Marcus pulled his fingers out and brought them to my lips. "Open."

I glared at him but parted my lips. He slid them inside, letting me taste us both.

"Good girl," he murmured, eyes dark. "This is just the beginning."

My pussy clenched around nothing, already aching for more even as dread twisted in my stomach. Alex was right outside. My parents would be home soon. And Marcus had videos that could destroy everything.

He kissed my forehead, soft and lingering, then stepped back to fix his clothes like nothing happened.

I slid off the desk on shaky legs, cum still leaking down my thighs, and wondered how the hell I was going to face Alex while smelling like my stepbrother.

Marcus watched me try to smooth my dress, that possessive smirk back on his face.

"Welcome home, Lena."

I flipped him off, but my body was already humming with the promise of what he'd do next.

And the worst part? Some sick part of me couldn't wait.

Alex would knock again any second. And this time, I wasn't sure I'd be able to hide what Marcus had just done to me.