Standing up from bed, Kara marveled at the pendulous feel of her new udder. It was massive. Oddly, however, she found non trouble supporting it, as if her body mass had altered to accommodate it.
"Wha-what am I gonna do with this thing....I can't go out like this..." she thought, uncertainty filling her mind.
Staring down, she placed a hand on her new udder. While soft to the touch it had a certain firmness, almost akin to an overfilled waterbed, that suggested it was full and needed release. As she took it in, something about the size seemed to speak to her. A weird pride filled her that she couldn't explain. It was big, girthy, and all hers. And the loook....it made her feel...productive. Idly, she rubbed one of her new nipples. With just the faintest touch, a tingle of pleasure shot up through her spin.
"fuck" she whispered, marveling at the amazing new sensation "This thing is....well, feels....fantastic"
Slowly, she began to pump the nipple up and down, further flashes of pleasure shooting up and around her pendulous udder, making it feel like an engorged ball of pure sensation. The nipple began to harden, stimulated by her touch. Something within her shifted. She could feel a growing fullness, a deep need for release that consumed all her attention. Stroke after glorious stroke, the pleasure mounted and the need for release heightened.
And then it happened.
Warm, snow white milk burst forth from her udder as an orgasm jolted through her. Her udder pulsed in delicious release as the other nipples joined in the fray. More and more milk spray from her, coating her floor creating an even growing puddle.
She tipped her head back, eyes crossed and let out a loud, sustained, pleasured "mooooooooooooo"
Below her her feet gradually retracted. Each toe slowly merged together, forming a hard black keratin as they simultaneously thickened. Soon two thick, heavy hooves capped her legs. Small whit hairs slowly pushed from her, spreading up from her hooves until meeting her knees. Her stance began to alter as her lower legs seemed to bend backwards taking on a new more animistic digit-grade stance. A stance befitting the anthro cow she was becoming.
Minutes passed and the orgasm raged on. Karas thoughts had long since vanished, melted by the sheer volume and intensity of the pleasure. Eventually, however, she felt a decline. Her production fell and the milk streams abated to a dribble. As the pleasure waned, she fell back on her bed, soft 'moos' escaping her lips as she closed her eyes and slowly rubbed her udder. Sleep soon took her.
Hours passed
Opening a groggy eye, Kara saw that it was now dark out. Her body's new biological purpose severed, her mind willed her to sleep the day away.
"wha-waht did I ....doooooo" she mooed " god, that felt ~amazing~` but i -I can't give in again...I don't want to be a cow. What do I do...."