"... you're a rat" she screamed, twirling her fingers. She muttered some strange language and Robert felt himself shrinking, requiring himself to struggle out of his clothes. Robert broke free as brown fur spread across his body, his face moving towards a point as his eyes became beedy and small. He felt a curious paint as a long tail pulled out of his behind. He tried to take stock the situation as he found virtually at ground level on all fours, his hands and feet pointy claws, albeit little ones. His teeth protruded from his jaw. Capable of causing a substantial bite. Despite this however his rodent brain was going into overdrive, terrified of the now dangerously bigger Allison in front of him.
The giantess smiled and bent down, cruelly yanking him up by his new tale.
"A fitting form, for such a wretched creature" she goaded.
Robert the rat tried to use his mouth and claws to struggle free, but he was in no position to fight back. She was a powerful witch he realised, while he was merely a rat whose form was seemingly putty in her hands.
"Now" she said, deliberately placing her finger to her mouth to show she was thinking, "what do I do with you now..."