The trope is your typical suburban, middle class white family are soft parents who let their kids get away with murder. You’ve seen the type - parents whose kids are on an absolute rampage and their response is to squat down and say, “Now Kayydenn, we don’t do that here.” The implication being that if the non-white kid did that their parents would beat the hell outta them.
NB: I’m whiter than Wonder bread and 35 and I still wouldn’t dare call my mother by her first name.