"OK, that's it," Steve said, putting his strong hand over Paul's now-smaller paw. Steve turned the key and the engine died. "I'm not going to let you drive like this. Come on inside."
Paul's jaw worked. He was trying to think of some way to get rid of Steve, but at the same time just feeling his little hand inside of Steve's large one was tremendously distracting. His cock throbbed. Paul looked up at his friend, seeing the too-large face that looked back at him, and Paul imagined those big lips kissing his furry front as it narrowed. The image was powerful and he looked down to try to dispel it. His gaze was rewarded by the stuffed crotch of Steve's jeans. Why was everything stimulating him sexually all of a sudden? Paul nodded, "Oh -- OK," and he pulled his hand away from the keys. Steve took them and opened his door. Paul opened his door too, and Steve turned away.
Paul opened his door and swung one leg out. He looked at Steve's neighborhood. If he was going to make a break for it, now was his chance. He was still big enough to "pass" as a regular person. Once he was away from Steve's big balls, he knew his shrinking should stop. Unhooking his seat belt, he felt his shoe drop off as it outgrew him. The time for decision was at hand.