Saying the line to torment Frankie in his last moments would not have been a product of Roth's sick mind; the Rosato Brothers, one of whom garroted Frankie, were sufficiently sick enough to spontaneously torment Frankie. So, to me, part of the script or an ab-lib, the line is a perfect illustration of the Rosato's avarice.
"Generosity. That was my first mistake." "Experience must be our only guide; reason may mislead us." "Instagram is Twitter for people who can't read."
