In agreement with your point that she is angry with her son, I found this extraordinary Freudian moment in the last paragraph of a long essay she wrote on Truthout http://www.truthout.org/cgi-bin/artman/exec/view.cgi/38/10216/printer
"My sweet boy who never passed up a chance to kiss my behind and tell me he 'wuvs' me is gone forever."
God bless Casey for being who he was despite her views, upbringing, and attempts at abject control.