It started with my neighbor’s dog. Titan. A huge black Rottweiler, pure muscle under short sleek fur, chest like a barrel, thighs thick as my waist. His owner travels constantly. I offered to keep him. At first it was just walks and food. Then one evening I was bent over filling his water bowl in nothing but a thin tank top and the tiniest pair of shorts. I felt his wet nose press against the back of my thigh. Higher. Hot breath against the thin fabric covering my cunt. A low, deep growl that wasn’t anger—it was pure animal hunger.

I should have pushed him away. Instead I stayed bent over and slowly pulled my shorts to the side, baring my smooth, already-slick pussy. Titan’s tongue dragged over me—thick, rough, relentless. It pushed between my lips and curled hard against my clit. I moaned out loud and dropped to my knees right there on the kitchen floor.

He mounted me immediately. Heavy front paws landed on my shoulders, claws pricking my skin. I felt the hot, slick weight of his cock slap against my ass, already sliding out of its black sheath, growing thicker and longer by the second. I reached back, wrapped my fingers around it, and guided the tapered tip to my entrance.

The stretch burned so good. That pointed head forced me open inch by inch until I felt it press against my cervix. I cried out as Titan thrust once—hard—and buried the rest of that thick black cock inside me in one brutal stroke. My pussy lips stretched obscenely around the shaft. I could feel every ridge, every heavy pulse.

He started fucking me in short, powerful thrusts that slammed his swelling knot against my hole again and again. My tits swung under me, nipples dragging on the cold tile. I reached back and spread my ass cheeks wider, begging for more. Titan snarled and drove deeper, hips snapping faster.

I came hard, cunt clenching around that invading cock, juices pouring down my thighs and soaking his heavy balls. He never slowed. Then the knot pushed in.

It was enormous. For a second I thought it wouldn’t fit. Titan growled and forced it forward, and that swollen bulb popped past my entrance with a wet, filthy sound. Instantly I was locked. The knot swelled even larger inside me, stretching my walls until I felt completely full. Every pulse of his cock throbbed straight against my g-spot.

His thrusts became short, grinding strokes. I came again, harder, collapsing onto my elbows with my ass high in the air while he pumped thick ropes of hot cum deep into me. So much that it leaked out around the knot in creamy streams. He stayed locked for almost twenty minutes. I stayed on my knees the whole time, moaning every time another spurt flooded me. When he finally pulled free, a thick river of white seed poured out of my stretched hole and pooled on the floor between my knees. I scooped some up with my fingers, pushed it back inside, then licked my hand clean.

That night I didn’t sleep in my bed. I slept on the living-room floor with Titan curled around me, his heavy cock still half-hard against my thigh. Every time I woke I stroked him until he was fully out, then guided him straight back into my sore, cum-filled cunt and let him knot me again.

By the third day I stopped wearing clothes at home. Titan mounted me whenever he wanted—against the kitchen counter, over the arm of the couch, in the shower where the water mixed with the constant drip of his cum running down my legs. I learned the exact angle that locked his knot deepest, how to squeeze my walls to make him knot faster, the wet sound of my cunt taking that thick black cock over and over until I lost count of how many times I came.

One afternoon I filmed it. Phone propped on the coffee table, I got on all fours and called him over. He mounted me immediately, cock already dripping. I looked straight into the camera as that thick black head pushed into my pink hole and stretched me open. I narrated in a low, breathless voice how good it felt, how no human cock had ever filled me like this, how I wanted his knot every single day for the rest of my life. When he locked inside me I came so hard my vision went white. I kept the camera rolling while his cum overflowed and ran down my thighs in thick streams.

I watched the video that night with Titan’s cock buried in my mouth, licking the last of his load from my lips. The next morning I posted it anonymously under the title “25yo slut locked on big black dog cock.” Within hours the comments were flooded with people begging for more, telling me how hard they came watching me take that knot, asking if I would film myself getting bred again.

I smiled, reached down, and stroked Titan’s heavy sheath until his cock slid free once more. I spread my legs wide for the camera, guided him back to my dripping entrance, and whispered to the lens,

“Come back tomorrow. I’ll show you how deep he can go when I really beg for it.”

Then I pushed my hips back and took every thick black inch—knot and all—while the camera recorded every wet, filthy second.

And I already know I’ll never stop.

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