Lucy was fascinated by Tom's horse cock. She had to taste it. She wrapped her lips around it, barely fitting it in her mouth. So big. She struggled not to gag. Meanwhile Tom's body continue to change, his legs shifting into the rear legs of a horse. Lucy had to pause to catch her breath.
"If you keep this up, I may turn completely into a horse" warned Tom.
Lucy looked at the stable boy, now almost a horse satyr. She might stop now, save some part of Tom's humanity. Yet she felt a strong desire, a strange compulsion to keep giving Tom oral. His cock was in her mouth again and he whinnied with pleasure. Tom steadied himself by putting his hands on Lucy's shoulders but he could see the transformation continuing. His arms stiffened and became the forelegs of a horse. His hands lost their gripped, slipping down Lucy's back and becoming hooves. And still Lucy sucked and licked. She slid a finger into herself, masturbating as she gave a blowjob to Tom the stallion. She had never entertained such bestial thoughts before, but now desired nothing else.
Tom felt the last of his human form slipping away as his neck stretched and his mouth and nose began to grow into a snout. He could also feel what was coming and suspected it would happen when he was fully horse.
"Lucy..." he warned. "I'm..." And then human speech left him.