I walked into the kitchen and froze.
Grandma was already on her knees on the old linoleum, skirt shoved up around her waist, that soft, heavy ass pushed out and shining under the overhead light. Rook, her big black Lab mix, was locked behind her. His thick red cock was buried deep in her cunt, hips slamming forward hard enough to make her whole body jolt. The wet slap of it filled the room. Her juices coated his fur and dripped down her thighs.
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She looked back over her shoulder at me, eyes glassy, mouth open. A strand of spit hung from her lower lip.
“Get undressed,” she said, voice rough. “He’s going to take both of us.”
I didn’t argue. Clothes came off fast—shirt, jeans, underwear—until I was naked and hard, cock already leaking. I dropped to all fours right beside her. The floor was cool against my palms. Rook pulled out of her with a thick, wet sound. Long strings of her cum stretched from his cock before they broke. His knot was already starting to swell, shiny and red.
He turned on me immediately. Heavy front paws landed on my lower back. Claws pricked my skin. The hot, blunt head of his cock shoved against my ass, found the tight ring, and drove in hard. I groaned as he stretched me open in one long thrust. He was thicker than I remembered, hotter, and he started pounding right away—short, deep strokes that forced the air out of me.
Grandma watched, still on her knees, one hand between her legs, fingers sliding through the mess Rook had left in her. “That’s it,” she murmured. “Take it like I do.”
Rook fucked me steady and hard. Every thrust dragged along my prostate and punched deep. My cock swung and dripped onto the floor. His knot began catching at my rim, swelling bigger with every push. When it finally popped inside, the stretch burned for a second before the pressure settled into a deep, constant fullness. He kept moving in short, locked thrusts, cock pulsing inside me.
Grandma crawled closer. She reached under me, wrapped her warm hand around my cock, and stroked in time with the dog. Then she leaned in and took the head into her mouth, tongue swirling, sucking gently while Rook continued to pound my ass.
The dual sensation nearly undid me. I dropped my head to the floor, moaning as Grandma worked me with her mouth and Rook drove deeper. His front legs locked tighter around my waist. The knot stayed lodged, throbbing.
After a while Grandma pulled off my cock with a soft wet sound and smiled up at me, lips shiny. “Share him,” she said. She turned, presenting her ass again, and reached back to spread herself open. “Come on, Rook. Both of us.”
Rook pulled free of me with a thick, reluctant slide. My hole fluttered around the sudden emptiness. Cum and spit dripped down my thighs. He mounted her again in one smooth motion. His cock disappeared into her cunt with a filthy sound. She cried out as he started fucking her hard, knot still swollen, forcing its way back inside her with every powerful thrust.
I stayed on all fours, catching my breath, watching. Grandma’s big soft tits swayed beneath her. Her face was turned toward me, eyes glassy, mouth open. “Touch yourself,” she ordered between gasps. “I want to see you come while he breeds me.”
I wrapped a hand around my cock and stroked, matching the rhythm of Rook’s hips. His balls slapped against her. When the knot locked inside her again she went rigid, thighs shaking, a long moan tearing out of her as she came. Her cunt clenched around him; more fluid ran down her thighs and pooled on the floor.
Rook kept moving in those short, locked thrusts, pumping into her. I could see the base of his cock jumping as he started to empty himself. Grandma’s eyes rolled back. “That’s it… fill me… good dog…”
When he finally finished and began the slow process of pulling free, a thick rush of his cum followed, spilling out of her in heavy white ropes that mixed with her own juices. She stayed on her knees, breathing hard, one hand reaching back to hold herself open so I could watch it drip.
Rook turned to me again almost immediately. His cock was still hard, still red and glistening with the mess he’d made of her. He mounted me a second time without ceremony. The head pushed against my sore hole and slid in easier this time, helped by the slickness he’d left behind. I groaned at the renewed stretch. He started fucking me in earnest again, deeper, harder, the wet sounds louder now that he was coated in both of us.
Grandma crawled under me, on her back this time, and took my cock into her mouth once more. She sucked while Rook pounded my ass. Every time the dog drove forward my cock pushed deeper into her throat. She moaned around me, the vibration traveling straight up my spine.
I didn’t last long. The pressure built fast—knot swelling again, Rook’s weight heavy on my back, Grandma’s skilled mouth working me. When I came it was with a broken shout, spilling thick pulses across her tongue. She swallowed what she could and let the rest run down her chin, smiling up at me with messy lips.
Rook locked inside me again a moment later. The knot forced its way past my rim and stayed there, pulsing as he started to come. The heat of it filled me in heavy waves. I could feel every throb, every spurt. He stayed locked for long minutes, hips giving occasional shallow thrusts while he emptied himself. Grandma stayed underneath, licking the last drops from my cock, occasionally reaching up to stroke Rook’s side or murmur soft praise.
When he finally softened enough to pull free, a thick rush of cum followed, spilling out of me onto the floor and across Grandma’s stomach. She laughed softly, a low, satisfied sound, and scooped some of it up with two fingers, pushing it back into me before licking her hand clean.
We stayed like that for a while—me on all fours, breathing hard; Grandma reclining beneath me, one hand lazily stroking between her legs; Rook lying nearby, tongue out, occasionally nosing at one of us as if checking we were still there.
Eventually Grandma sat up, wiped her mouth with the back of her hand, and looked at me with that same glassy, content expression she’d had when I first walked in. “Next time,” she said quietly, “you can watch him knot me first. Or maybe we’ll take turns properly. He’s got plenty left.”
Rook’s tail thumped once against the floor. I didn’t answer right away. My body was still humming, hole twitching around the lingering stretch and the mess he’d left inside me. Outside the kitchen window the afternoon light was starting to fade. Inside, the air was thick with the smell of sex and dog and the quiet, satisfied breathing of the three of us.
Grandma reached over and rested a hand on my lower back, fingers tracing idle circles. “Clean yourself up when you’re ready,” she said. “Then come help me with dinner. He’s going to be hungry again soon.”
I nodded, still catching my breath. Somewhere behind us Rook stood, shook himself, and trotted toward his water bowl as if nothing unusual had happened at all. The wet sounds of him drinking filled the quiet kitchen. Grandma smiled at the noise, then at me, and slowly got to her feet, skirt still bunched around her waist, cum slowly trailing down the inside of one thigh.
This was my story now—mine and hers, and his. And it wasn’t finished.
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