She saw the stallion's cock first. Thick, veiny, and already half out of its sheath, swinging heavy between his hind legs as he paced the stall. Jenna's breath caught. She was supposed to be mucking out the barn, not staring, but the sight hit her low and hard. Her shorts were already damp.
The horse, a big black beast named Thunder, turned his head and snorted at her. His nostrils flared. He knew. Jenna stepped closer, heart pounding. She reached out, ran her palm along his flank, then slid her hand lower, under his belly. Her fingers brushed the hot, slick head of his cock. It jerked, swelling instantly.
"Fuck," she whispered. "You're really horny, aren't you?"
Thunder stamped once. Jenna dropped to her knees in the straw, yanked her shorts and panties down, and kicked them aside. She was soaked. She turned, braced her hands on the low wall of the stall, and pushed her ass back toward him. The horse shifted, his massive body moving over her. The blunt, flared head of his cock bumped against her thigh, then slid up between her legs, smearing hot pre-cum across her pussy.
Jenna reached back, grabbed the thick shaft, and lined him up. "Do it," she hissed. "Fuck me."
Thunder thrust. The first shove stretched her wide, forcing her open around that impossible girth. Jenna cried out, half pain, half raw need. He didn't stop. Another hard push and several inches sank into her, the heat and pressure almost too much. Her walls clenched around him, pulsing. The stallion grunted and drove deeper, fucking her with short, powerful strokes that rocked her entire body.
Each thrust shoved her forward against the wall. Her tits bounced, nipples scraping the rough wood. Cum and her own juices ran down her thighs in thick strings. Jenna reached between her legs, rubbing her clit fast while the horse used her. The stretch burned, but the friction was electric. She came hard, legs shaking, pussy spasming around the invading cock.
Thunder kept going. He drove in farther, the flared head battering her cervix with every stroke. Jenna moaned louder, pushing back to meet him. "Harder, you big bastard. Fill me up." The horse's rhythm turned rougher, his balls slapping her ass. She felt him swell even more inside her, the knot of his head locking tight for a moment before he pulled back and slammed in again.
Her second orgasm hit when he flooded her. Hot, thick jets of horse cum pumped deep, overflowing instantly and gushing out around his cock in messy spurts. Jenna's vision blurred. She kept rubbing her clit through it, milking every drop while Thunder emptied himself into her stretched cunt.
When he finally pulled out, a heavy flood of cum poured from her, splattering the straw.
Jenna stayed bent over, panting, pussy gaping and twitching. Thunder's cock hung low, still dripping. She reached back, scooped some of the mess, and licked her fingers clean, tasting salt and musk.
She stood on shaky legs, grabbed her shorts, and gave the stallion one last pat. "Good boy," she said, voice hoarse. "Same time tomorrow."
