The lions all looked over at him when he screamed, but then resumed tearing off hunks of meat. Derrick felt his ears again. This was Circe's island - and she had said no animal here would harm him. This wasn't harm - this was... pretty cool. The odor of their fresh kill was strong, and Derrick was surprised that it made him hungry, not disgusted. Curious, he stood and walked closer to the group of lions. The male watched him as it finished swallowing a hunk of hind leg, then came over to the boy, its muzzle sticky with blood.
Pressing its head into his crotch, the lion began to lick Derrick's sexual parts, the rough tongue both painful and pleasurable. The strange pulling sensation returned, only this time the pleasure shifted and got more intense. He did not have to see to know what was happening. The lion was turning him into a lioness.
Dropping to his hands and knees, Derrick found himself staring at the erect, barbed penis that hung between the lion's hind legs as the male continued to lick the former boy's new cunt. He leaned under the gold-furred belly and licked the tip of the pink cock, then used his lips and tongue more enthusiastically. He felt his face push out, and huge fangs fill his mouth. Vision shifted, and scents got stronger.
He was disappointed when the male shifted around so he could no longer lick the swollen cock, but that disappointment vanished when the lion suddenly covered him. Derrick gasped as the hard prod penetrated his... no, HER... cunt and drove deep as the lion began an intense mating. Her whole body throbbed and swelled out, hands becoming paws, arms becoming forelegs. A roar came from her changed throat as the lion made a final deep plunge and exploded inside her. When the male pulled out, Derrick shivered in pain and pleasure, then rubbed against the male. He bumped against her and returned to the kill.
Derrick followed and found a still-warm section of chest that she ripped open with her powerful jaws. Blood flowed in her mouth as she tore off a hunk of flesh. In contrast to the boy's earlier revulsion, the lioness he had become accepted the meal as perfectly normal. She was still Derrick, but animal instincts and thoughts were in control, and she made no effort to overcome them.