Last week, a Florida mother allegedly killed her two "mouthy" teen children. Although a parent taking her child's life is rare, the adolescent behavior that police say fueled her rage is not, wrote Temple psychologist Larry Steinberg in an opinion piece. "Just about everyone who has raised a teenager has been exasperated by adolescent backtalk and incensed by challenges to parental authority," he wrote. "Rarely does parental anger have tragic consequences. But family violence in households with teenagers is shockingly common. And it is worth pausing for a moment to acknowledge and examine this."