Marcus huffed faintly as he set down a heavy bale of hay, sweat beading his brow. He knew he had only himself to blame for the day's hard work, but it didn't keep him from hating it. He and his wife Sammy had made a deal with the devil for their farm: it would be a home for them for as long as they worked the land.

But damn, if that work wasn't a killer on the back. He groaned as he walked slowly back towards his house, a proud but pained smile on his face. He waved at Sammy as she ran out from the house, her eyes wide with concern.

“Baby! Not again!” She exclaimed, wrapping her arms around her husband in a hug. Her blond hair shone like the halo of the angel that Marcus knew she was, and he smiled with content, petting her head.

“Yeah...” He sighed, kissing her cheek. “Who'd have thought that the two of us working for a living would be so hard on the body?” He gave her a small chuckle, resting his head on the crook of her shoulder.

“I know...” Sammy sighed, looking up to the dark-haired man sympathetically, wiping his brow with her hand. “I just... I just wish that there was some way we could live here without having to work.” A pained expression flitted across her face, and Marcus chuckled.

“Hey, no need to get so worried on my behalf. I'm built sturdy, you know?” He grinned, trying to lighten her mood. But her look of discomfort remained unchanged, and Sammy shook her head, eyes narrowing with concern.

“N-not that... I don't feel right.” Sammy groaned, her hands wrapping around her stomach. “It feels like... Like something's swelling... Ooohhh...” She moaned loudly, falling into her husband's arms.

“Honey?” Marcus asked, eyes wide with concern as he sank to a knee, letting her rest a little more comfortably. His hand fell to her belly to massage her in a desperate attempt to alleviate her distress. But much to his surprise, his palm met more than just her smooth stomach.

There were bumps just under her t-shirt, and they were growing ever-larger by the second. Marcus gasped in slight surprise, lifting the clothing to get a better look at what his fingers had felt. His eyes bulged when he caught sight of the culprits: a growth that looked to be just like a cow's pink udder, nestled just above her groin.

“Wh-ooh... What's wrong?” Sammy moaned, her breathing beginning to come more rapidly as sweat began to dew along her body. She moaned again, her eyelids fluttering at some alien sensation. “I feel... Bloated...”

Before Marcus could come up with words to describe to her what was happening, her body began to expand. It was like she was being inflated, pounds of flesh settling in all over her body—most notably her stomach. And the expansion wasn't stopping, her form getting bulkier and bulkier; clothes beginning to tear.

“So-nnh! So uncomf-ooo!” Sammy moaned her hands fumbling at her shirt to try and remove the offending article. She didn't get far though, her fingers stiffening before she could so much as tug at it.

Marcus watched as his wife's delicate hands darkened, swelling into what could only be hooves. Her wedding ring snapped off from her fingers at they fused, and a popping from her shoes told him that her feet were transforming as well.

“I... I don't know how to say this, but... It looks like you're becoming a cow.” Marcus said, his mouth feeling oddly dry as he looked his wife in her eyes. She moaned loudly as her clothes began to tear around her, though she was hardly naked underneath.

A coat of coarse, white fur had begun to develop beneath her clothing, large and black splotches forming to confirm Marcus's suspicions. He held his wife's thick and furry body in his arms, knowing nothing else to say; nothing else to do to make her feel any better about what was happening to her.

Luckily for him, it looked like Sammy had some ideas for that. “Muh... Milk me!” She gasped, her voice strained as it deepened in pitch. “Udders.. Fu-oool! Muhilll... Ooo! Mooo!” She bellowed, her throat seeming incapable of pronouncing any sounds other than a cow's mooing.

Marcus obliged, his hands wrapping around her udders and tugging on them gently, trying to ease as much of her discomfort as possible. It seemed to do the work, a cry of relief escaping her thickening lips as her face stretched out into a cow's snout. Her nostrils widened and she snorted with content, snuggling up to Marcus.

But as her creamy and warm milk spilled onto his hands, they began to grow numb. He looked down to see them darkening, panic settling on his face as he realized he wouldn't be able to keep his wife happy for more than a few more moments, at best.

Wracking his mind desperately, Marcus did the only thing that came to mind. He fell to all fours and latched his lips around one of her teats, sucking on it as hard as he could. And, much to his delight, it worked.

A louder and even more pleasured moo escaped Sammy's mouth from above him as he suckled on her udder, drinking more and more of her milk. With every gulp of the cream he felt himself change more and more, but all of that was fine with him. If Sammy was a cow, then he'd be her bull; anything as long as he could be with her!

The man drank more and more, his body rippling with growth as he began to gain dozens and dozens of pounds of flab. His clothes were no match for it, the thick flesh rippling out from around the seams; the fat stretching the threads to the point that they had to audibly protest with creaks and snaps.

But Marcus kept chugging his wife's cream, determined to transform for her. His skin itched as cow's fur sprang out from beneath it. His bones ached as they reformed; as he grew a tail. His feet cramped as they became hooves just like his hands.

Despite how alien the sensations were, not one of them bothered the changing man. He even rejoiced as his face started to stretch out into a muzzle; as his tongue grew thick and cowy within his bigger mouth's confines, wrapping around his wife's long teat. It all meant that he was changing as she had; that they'd still be together.

Then the change took a turn for the pleasurable, and Marcus had an entirely new reason to suckle at her mammary. His cock was aching beneath him, beginning to engorge just as his body had. His member doubled; then tripled in length and girth alike, an mad onrush of blood flowing to his tip as it swelled, becoming something truly animal. Lusty thoughts began to fill his mind, and he realized he wanted more than Sammy's milk; he wanted Sammy!

Marcus smacked his lips as he rose from her udder. The two of them had somehow become a pair of bovines, and yet... And yet there was something so incredibly sexy about it all, something so beautiful about Sammy now that she was a cow!

He had no idea what drove him to pad behind her; what drove him to mount her, planting his bulky form on her broad back. But he knew that it was the same force that had caused his wife to flick her tail along his cock; to stiffen it and make it swell just as his heart was swelling with love for her.

Marcus mooed loudly and speared her with his thick bull's penis, his throbbing shaft sliding with ease into her wet folds. Sammy echoed his cry with one of her own, shoving her fat bottom closer to his groin in an attempt to eke out more pleasure.

And if pleasure was what she wanted, pleasure was what Marcus was all too willing to give her. He began to thrust deeply into her body, the wet sounds of their lovemaking filling the air; punctuated by the slap of his pendulous balls against her ass. Both bovines flicked their ears, trying to hear more from their fucking.

The sound was good, so good that Marcus had to add to it. “Unh! Unh! Unh!” He groaned loudly, his big muzzle open to give voice to the pleasure his wife was giving him. He didn't care that his every thrust made him feel a little dumber; that every massive surge of his hips made him lose more of himself. All he cared about was making the cow beneath him feel as good as she made him.“Unh! Unh! Unh!”

Marcus's mind dwindled further until he thought of himself as nothing more than a bull, fully an animal in body and mind. His surrender was to both primal instinct and carnal pleasure alike, and a low groaning began to emerge from his throat as he neared climax. “Unh! Unh! Urrooo!” He bellowed, balls clenching.

“Mah... Mooo!” His cow replied, her glazed eyes devoid of humanity but her voice full of love for her mate. Her folds clenched hard around his thick cowy cock, and with another bellow he climaxed, impregnating her with a torrent of potent seed.

Sated, the bull pulled out from his cow with a low grunt, his huge cock taking a few seconds to slip from her damp love hole. His mind was simple, but it was completely enraptured with the cow who he'd mounted. He moved from behind her to beside her, nuzzling her cheek with his own, a delighted lowing emerging from his throat.

Then, as the bull snuggled into his cow and mate forever, their forgotten rings began to shake on the ground. The two broken bands of metal grew and lifted from the ground, the cow's snaking around her ear and the bull's clamping onto his nose.

The two animals had no idea of the significance of the strange metal objects on their bodies, but they felt oddly comforted, their eyes growing heavy as the day's work finally caught up with them.