Getting the crap beat out of him by the mother WAS the appropriate consequence. Her taking a baseball bat to his car (which actually turned out to be HIS mother’s car) is VANDALISM. PERIOD.
Statutes could differ on the former too... even the bible would, even if the prescribed penalty was stoning, it would have to go through the city fathers. And if she did not scream, she gets the stone too... that might dissuade mom from being a witness here....