Sophie had little time to ponder what the light had been, the feeling spreading through her body was growing stronger by the second, within moments it felt like waves of heat pulsing through her. Panting Sophie scrambled to remove her overalls as sweat ran down her body as the the heat intensified, "what's happening..." she moaned, finally freed of her clothing, but it offered little relief. As she dizzily collapsed onto all fours Sophie got her answer as she began to change.
"Euahhhh!" Sophie cried out as she felt something erupt out of the tip of her spine, looking back in terror she saw a tail growing from her, reaching its full length a tuft of blonde hair grew from its end. "I... I have a taialllll!" Sophies words were cut off as further changes assaulted her, her body beginning to slowly swell as she gained mass.
Looking down Sophie was in prime position to see her fingers harden and pull together, within moment her hands has become hooves. As the pulsing in her body grew stronger still, Sophie's once petite breasts began to swell and bloat grotesquely. It was only when her now huge tits began to merge together and move down her chest that Sophie finally realised what she was becoming, "A cowwww! I can't be turning into a dumb fat cowwww!!!"
Wincing Sophie felt what could only be horns begin to grow from the side of her head, her ears had long since flattened out and her face was already beginning to stretch forward into a small muzzle. "No mooooore" she cries as she felt pin pricks all over her body as blonde hairs began to coat her pale skin, it wouldn't be long now.
Her body now huge and fat Sophie was assaulted by the final wave of changes, the heat within her concentrated on her nether regions and she began to cum uncontrably as an alien lust overtook her. Sophie's now huge rear jiggled as her asshole bloated and pushed out, darkening into a meaty donut. Not to be left behind Sophie's once tight vagina began to rapidly swell and lose its human shape as it pulsed in orgasm, its pink flesh turning a dark brown, within moments a huge cow's vagina was all that was left, slowly winking as it dripped bovine juices.
"Moooo!!!" Sophie called out, her transformation having finished speech was now impossible. A fat blonde cow now stood in the barn, all traces of the girl it had been now gone. Thoughts raced through her head as Sophie realised she had no way of telling anyone who she was, but even more concerningly her vagina still burned with arousal, and her udder ached empty of milk. Sophie reluctantly realised she needed to fuck, and badly, embarassed she looked across the barn to the stall where the farms bull was housed, she had no choice she told herself.