Kathy briefly flipped through the several hundred pages, trying to figure out the content of the book. There were multiple mentioning of strange spells and magic, primarily focusing on farm animals. "This must be a spell book! I wanna cast a spell, but what to choose?"
She decided to read the section on cows, since they fascinated Kathy ever since she first set sight on them. Kathy read one of the lines aloud "the spell below shall transform you into a beautiful and curvaceous form of the sacred holy beast." Apparently that meant making her sexier and more attractive. Kathy looked down at her flat chest and small rear. There were no womanly features anywhere to be seen. "Why can't I be developed like my friends?!"
Kathy proceeded to read the incantation, hoping that it would make her into a gorgeous young lady. Her body began to glow, and her eyes widened with confusion. "Hmm, I wonder what's happening?" Two large mounds suddenly exploded from Kathy's chest and drooped heavily in front of her. The thin fabric on her T-shirt was stretched to it's limits as two DD-cup breasts burst out. Kathy felt her nipples becoming large and puffy as the T-shirt finally gave in and completely ripped apart. She saw her massive bare titties and felt satisfied. "Woah, I'm really stacked!"
Her hips began to widen while her waist was getting small and thin. Kathy gasped softly as she felt her ass getting quite round and full. The jeans struggled to contain her wide hips and big butt, and split clear apart, leaving her in just cotton panties.
Kathy felt a intense shot of pain rush through her head. "Aughhhh! It burns so much!" Two small horns pierced through Kathy's skin as they protruded from the sides of her head. She grabbed her new horns and wanted to scream. "Nooo, I can't have horns!" A long whip-like tail rapidly emerged from above her large ass and flung around as Kathy gained control of it. Her legs became extremely muscular while thick black and white hair covered them. "I can't be turning into a cow! There's no way!" Tears rolled down her face as her feet hardened and merged into two black hooves. They clanked and clucked against the cold hard floor.
Kathy felt her panties getting tighter as pink flesh began to push out from her vagina. Four small nubs quickly formed around the flesh and soon developed into teats. Kathy looked down her panties and saw an udder growing! "Nooooooooo!" Her udder continued to get larger and heavier as it slowly pushed her bovine legs apart. Thick veins began to pulsate as blood now circulated through her giant udder. Kathy's panties could not handle the stretching, and tore apart, leaving her cow-like body completely naked. "Aw man, why do I have to be naked?"
Her udder was now huge and painfully loaded with gallons of warm milk. Kathy struggled to carry the weight, and tried to keep her balance.
Kathy stood there motionless, unable to grasp and comprehend what had just happened to her. She broke down in tears and covered her face in shame after examining her new body. "...w....why must this happen...to me?" "Sniff, I didn't want to be a cow! Just a beautiful girl, that's all!" Kathy took a moment to realize her situation. On one hand, she was really stacked and voluptuous. All of the boys at her school would ask her out and be friends with her with such womanly features. On the other hand, she had gained horns and became a cow from the waist down.