There has always been dirty talk among school kids, but in the past, the worst of it was kept quiet before adults because they would get “the principal’s office” otherwise. They sure would not dare blurt such things out to a school bus driver.
Unless that mean little girl was suffering from an unanticipated bout of Tourette’s, had been bitten by a zombie with rabies, or something equally beyond her control, she... well in the old days that’s the sort of thing a paddle was kept in the principal’s desk for. Today if you look at the kid crosswise they scream at YOU not the kid. At the least she ought to be forced to a reform school. Telling the bus driver her kids should kill themselves. There’s no reason the rest of the kids should suffer her bad company.
I would have been paddled by my bus driver, no need to go back to school or wait until I got home!