Nothing had happened, at least Dan couldn´t see or feel anything changing. But before he could say anything, Kat did so: „Let´s move to the garage, there is more room for you.“
Dan wanted to protest, but oddly to him just nodded and followed her down. Whatever she did made him obedient and that worried him. In the garage he could talk again: „What have you done to me, Kat?“
Kat turned to him and grinned. „I just made sure you would follow me here without complaining. The real changes will soon start.“ With that said Kat started a new spell while Dan's body moved tot he empty center of the garage.
As the spell hit Dan he fell forward, instinctively breaking the fall with his hands. He screamed in pain as his body started to shift, rearranging parts of it. The screams stopped when his mouth wandered down his body without connection to his voice, traveling his left side until it ended just above his ass, hidden by his shirt. His cock and balls moved under his stomach, his cock pointing back towards his feet. His nose was sucked into his face, moving inside him without reappearing. His ears moved down to his shoulders, while his eyes drifted further apart on his otherwise empty face.
Dan also felt his insides moving around. He felt his heart moving up into his head, switching with his brain which had moved down to his chest. His stomach and digestive system merged into one big, hollow organ, now placed near his ass, while his vocal cords slipped towards the position his brain was now in, merging into it. His lung had moved down as well, now near the point where his mouth was on the outside.
„You look interesting, dear brother. I´m sorry fort he pain, but that will go away soon so you can enjoy what you turn into. Let´s move to the second part now.“ Kat said, and Dan could see her looking apologetic at him from his left eye. Her grin had vanished the second he started screaming in pain, so at least she wasn´t happy causing him said pain. A little spell vanished his clothes before they could rip or cause more pain.
Dan felt his clothes vanish, but a mere second later his whole body felt as if something was tickling him. His body expanded while his skin turned dark blue and, after the expanding stopped, metallic. His arms and legs spread out under him and he dropped flat on his underside. It wasn´t comfortable as his legs were pushed apart until they were parallel to his arms, straight away form his sides. His hands and feet gained an additional finger or toe before they moved around on them, placing them around his palm with synchronous space in between. His nails expanded to both sides of each digit, merging together in a circle around his whole hand or foot. Then they turned into black rubber, also covering the tips of each digit. And if Dan would be able to see them, he would know his hands and feet were now big tires for the car he was changing into.
From there the changes continued up his arms and legs, as they changed into the axles to hold the tires, pushing his body up again, so only his new tires touched the ground. His cock turned into the exhaust pips while his balls turned into his new convertor. His merged organ that had been his stomach hollowed out and turned into the cars trunk, his ass turned out to be the boot lid. His lung also hollowed and merged into one, becoming his tank, with then connected to his mouth, the fill in.
Meanwhile his heart became his motor with his head turned into the engine compartment around it. His eyes became the unblinking headlights. The rest of his body had hollowed out, his ribcage changing into the cabin. His nose, which had been inside the ribcage, became the steering wheel, while his brain turned out to be the board computer, with his vocals as the integrated radio. Parts of his spine changed into the seats, cushioned by a small part of his former body fat. While his now car body gained doors and windows, his ears changed into the side mirrors. Other bones formed the rest, like his pedals, shifter and so on.
Kat smiled at her new dark blue car that has been her brother before. „I hope you will like it now that you are finished changing, Dan. I will take you on a test drive now.“ With that said she got into the drivers seat after opening the garage door and started him up. She just drove around the block in various speeds for half an hour before returning home, asking his opinion.
To Dan it had been a rather painful change, but now that he was finished it had been better. When Kat started his motor it felt refreshing, and been driven around was a bliss. The faster he was driven the more air left his exhaust pipe, which felt to him like a constant orgasm. Feeling the wind on his now metallic skin felt really nice too, so he really enjoyed the whole thing. So when Kat asked, he could only say: „That was awesome. If only the changes hadn´t been this painful, but now I feel great.“
Kat grinned as she heard Dan through the radio. „I´m glad you liked it. By the way, you can´t be damaged as a car, so don´t worry that you could die. Just enjoy it for now.“ With that said she left the garage, leaving Dan alone in there. Soon his engine was completely switched off, and Dan, who had thought it would be boring as hell now, fell asleep until Kat would turn him on again.