[P-hack]

there was no "purchase", he was letting her use it, till he didn't any more, that is his perogative (aside from being nice and pro-rating if appropriate, despite her reckless behavior with his property), it is his car, he can do that. When he clubbed it, she stole it.

And there is no contract here to speak of, it is his car and his responsibility to ensure it is used in accordance with the law, what source do you have that would imply anything else?