Molly Notkin spills her guts (p. 790)
That the completely secret and hidden substance-abuse problem, the one that had now landed Madame Psychosis in an elite private dependency-treatment facility so elite that not even M.P.’s closest friends knew where it was beyond knowing only that it was someplace far, very far away, that the abuse-problem could have been nothing but a consequence of the terrible guilt Madame Psychosis felt over the Auteur’s suicide, and constituted a clear unconscious compulsion to punish herself with the same sort of substance-abuse activity she had coerced the Auteur into stopping, merely substituting narcotics for Wild Turkey, which Molly Notkin could attest was some very gnarly-tasting liquor indeed.
Context
Notkin's theory of Joelle's secret addiction: self-punishment for the Auteur's suicide, guilt metabolized into the very substance-abuse she'd once made him quit. Carlisle records the deposition as matching his long-running "Joelle's been in a cage since Y.T.S.D.B." claim — while himself supplying the counter-evidence (her cocaine use was already underway in 2001), so the guilt-origin story can't be the whole etiology. His reading recorded, not adopted; the DFW text is this paragraph.