She walked into the barn that night knowing exactly what she wanted. No more teasing herself with fingers or toys. She needed something real, thick, and alive. The stallion stood in his stall, massive and restless, his black coat shining under the dim light. Her heart pounded as she stripped off her clothes, letting the cool air hit her bare skin.
She approached slowly, her pussy already wet and aching. She reached out and ran her hand along his flank, feeling the power under the muscle. His cock hung heavy, half out of its sheath, dark and veined. She wrapped both hands around it and started stroking, feeling it swell and lengthen fast. It grew thicker than her wrist, hot and pulsing in her grip.
"Fuck, you're huge," she whispered, voice low and rough. She dropped to her knees in the straw and licked along the head, tasting salt and musk. Her tongue worked the slit, then she opened wide and took as much as she could into her mouth. It stretched her lips tight. She gagged but kept sucking, drool running down her chin as she pumped the shaft with both hands.
The stallion snorted and shifted his weight. She stood up, turned around, and bent over the hay bale she had placed there earlier. She reached back, spread her ass cheeks, and lined the massive head up with her dripping cunt. She pushed back, grunting as the blunt tip pressed against her entrance. It was too big at first, but she rocked her hips, working it in inch by inch. Her pussy stretched wide, burning and slick, until the head popped inside with a wet sound.
She moaned loud, "Oh shit, it's splitting me open." She pushed harder, taking more of the thick shaft. Her walls clenched around him, pulsing as she sank down until she felt full to the limit. She started riding, short thrusts at first, then longer ones. The stallion thrust forward on instinct, driving deeper with each movement. Her tits swung under her as she fucked back onto that huge cock, juices running down her thighs.
Every stroke hit deep, stretching her more than anything ever had.

She reached between her legs and rubbed her clit hard, fingers slipping over the swollen nub. "Fuck me, breed me with that horse cock," she growled, voice raw. The stallion's hips jerked, shoving even more inside her. She felt the flare start to swell at the base, locking her in place as he came.
Hot, thick cum flooded her pussy in heavy spurts, overflowing and leaking out around the shaft. She screamed as her own orgasm hit, cunt clamping down, body shaking. She stayed there, impaled and dripping, until the stallion pulled back and the flared head slipped free with a wet pop. Cum poured out of her stretched hole, running down her legs in thick streams.
She collapsed onto the hay, breathing hard, pussy throbbing and sore in the best way. This was only the first time. She already knew she would be back.