The Professor's Pet-4

SOPHIA

The drive to Cain’s remote cabin felt like descending into hell wrapped in velvet. My thighs still ached from yesterday’s office encounter, and his dried cum had left faint, flaky trails under my blouse the entire way to campus. I hadn’t dared wash it off. Every time I moved, I felt it—his mark on me.

The cabin was deep in the woods, miles from any signal or help. When I pulled up, Cain was already waiting on the porch, wearing a black button-down with the sleeves rolled up and dark jeans that hugged his powerful thighs. His gray eyes gleamed with dark anticipation as I stepped out of the car.

“On time for once,” he said, voice low. “Good girl.”

Inside, the cabin was luxurious but isolated—thick wooden beams, a massive king bed in the open loft, and a heavy metal collar resting on the coffee table like a promise.

“Strip,” he ordered the moment the door shut.

My hands trembled, but I obeyed. Blouse, skirt, bra, panties—all of it hit the floor until I stood completely naked before him, my full breasts heaving, nipples already tight, pussy glistening with fresh arousal despite the fear twisting in my gut.

He circled me slowly, then picked up the collar. Cold leather and steel clicked around my throat. The lock snapped shut with terrifying finality.

“This weekend, you’re not a grad student. You’re my pet. My project.” His fingers traced the collar, then trailed down to pinch one nipple hard. “And by the end, you’ll beg to drop your thesis and stay collared full-time.”

He led me to the center of the room and pushed me to my knees. “Spread your legs. Show me that needy cunt.”

I did, knees wide on the hardwood, exposing my soaked folds. Cain unzipped slowly, freeing his thick, veined cock. It was already rock-hard, the head glistening with precum.

“Open.”

I parted my lips and he slid inside, stretching my mouth wide. He fucked my face with deep, controlled strokes, hitting the back of my throat while one hand held the back of my collar like a leash.

“Eyes on me,” he growled. Saliva dripped down my chin onto my tits as I gagged and sucked, tongue swirling desperately around his shaft. He pulled out just before he came, leaving me gasping and empty.

The real training began.

He bent me over the heavy oak table, cuffing my wrists to the far side so my ass was presented perfectly. His palm cracked across my ass—sharp, stinging slaps that made me cry out and drip even more. Ten on each cheek until my skin burned red and my pussy throbbed painfully.

Then came the edging.

Cain dropped to his knees behind me and buried his face in my cunt. His tongue licked long, slow stripes from my clit to my dripping hole, sucking my swollen folds, fucking me with his tongue while two fingers curled deep inside. I moaned and pushed back, chasing release.

Every time I got close—my walls fluttering, thighs shaking—he pulled away.

“Please, Cain… I need to come,” I begged, voice hoarse.

“Not yet.” He stood, lined up his thick cock, and slammed into me in one brutal thrust. The stretch was exquisite. He fucked me hard and deep, hips slapping against my sore ass, balls smacking my clit. My breasts swung with every punishing stroke, nipples brushing the wood.

He reached around and rubbed my clit in perfect rhythm. I was right there—

He stopped again. Pulled out completely. I sobbed in frustration.

This went on for what felt like hours. Fingers. Tongue. Cock. Toys he brought out—a thick vibrating dildo he worked into my pussy while he fingered my ass, a clit suction toy that had me screaming. He brought me to the edge over and over until I was a dripping, shaking, tear-streaked mess, the collar tight around my throat.

Finally, he uncuffed me and carried my limp body to the bed. He laid me on my back, spread my legs wide, and climbed between them. His cock nudged my entrance.

“Beg properly, little sister.”

Tears of desperate need rolled down my cheeks. The guilt, the shame, the overwhelming addiction warred inside me. This is my stepbrother. This is destruction. But my body burned for him.

“Please, Cain… fuck your pet. Ruin me. I’ll do anything. I’ll be yours. Just let me come on your cock.”

He thrust in to the hilt.

The moan that tore from me was raw. He fucked me with savage intensity—long, powerful strokes that bottomed out every time, grinding against my cervix. His mouth claimed mine in a filthy kiss, tongue fucking my mouth in time with his cock. One hand pinched and twisted my nipples while the other rubbed my clit relentlessly.

“Come,” he snarled against my lips. “Now.”

I shattered.

My pussy clamped down on his thick cock like a vice, spasming wildly as the most intense orgasm of my life ripped through me. I squirted around him, soaking his abs and the sheets, screaming his name until my voice broke. Wave after wave crashed over me, my walls milking him desperately.

Cain didn’t stop. He fucked me straight through it, harder, chasing his own release. His cock swelled inside me, veins pulsing.

“I’m going to fill this womb,” he growled. “Breed my little stepsister’s cunt.”

The dirty words sent me over again. Another orgasm hit as he buried himself deep and came with a guttural groan. Hot, thick ropes of cum flooded my pussy, pulse after pulse, so much it leaked out around his cock as he kept thrusting through his climax.

We collapsed, panting, his cum still leaking from me.

He kissed my collar possessively. “Good pet. Tomorrow we go deeper.”

Exhausted, I slipped into sleep with his cum still inside me.

Hours later, I woke to the sound of his voice in the next room. The door was slightly ajar. I crept closer, still naked and collared, and froze.

Cain was on the phone, voice cold. “Yes, the new subject is progressing faster than the last one. Sophia’s almost broken. Another weekend and she’ll sign the papers transferring full control of her academic record to me… permanently. Just like the others.”

My blood turned to ice.

Others?

He had done this before.

How many other girls had Cain destroyed before me? And now that I knew his darkest secret, would he let me leave the cabin alive… or would he chain me here forever as his perfect, broken pet?