I was eighteen when it happened, fresh out of high school and still living on my uncle's farm for the summer. The place was quiet, just me, the animals, and too much time alone. One afternoon I was mucking out the pony stall when the big gray one, Thunder, started getting restless. His cock dropped out heavy and thick, swinging between his legs while he snorted. I couldn't stop staring. My pussy got wet right there in my shorts, the fabric rubbing against my clit as I shifted my weight. I had never been with a guy, let alone anything like this, but the sight made my mouth water and my cunt throb.
I dropped the rake and stepped closer. Thunder turned his head, dark eyes watching me. My hand shook as I reached under him and wrapped my fingers around that hot, veiny shaft. It was bigger than anything I had imagined, pulsing and slick at the tip. I stroked it slow at first, feeling it twitch and grow even harder. Juice leaked from my pussy and soaked my panties. I pulled them aside, climbed onto the straw bale beside him, and lined my tight hole up with the head of his cock.
The first push hurt like hell. That fat head stretched my virgin cunt wider than I thought possible, forcing its way inside inch by inch. I grunted and pushed back, sweat running down my back. Thunder shifted his hips and more of that thick pony meat slid into me. My walls clenched around him, burning and dripping at the same time. I reached down and rubbed my swollen clit while I rocked, taking a little more with every movement. The stretch was intense, almost too much, but my body kept getting wetter, making sloppy sounds every time I slid down on him.
I fucked myself on that cock like a desperate slut, legs shaking, tits bouncing under my tank top.
Thunder let out a low whinny and thrust forward, burying even more of his length inside my stretched pussy. I came hard, screaming into the empty barn, my cunt spasming and squirting around the invading shaft. Cum and my own juices ran down my thighs. I didn't stop. I kept riding, chasing another orgasm, feeling that huge cock throb deep in my belly.
When Thunder finally blew, it was a flood. Hot, thick pony cum pumped into me in heavy spurts, overflowing my pussy and pouring out around his cock. I collapsed forward, still impaled, shaking through the aftershocks. My first time had been with a pony, and already I knew I would be back for more.
