 At first Cressy tried giving a little half-truth to Nona, in that her father was just another loser who forced himself upon her 'mother', however Nona rejects this idea.It isn't until the end, when Nona is sharing her incest fantasy about the Black Prince, that Cressy snaps and screams the complete truth out, which Nona also denies as real and runs off with her grandmother's ashes.In the screenplay, it is possible that she eventually accepts that Cressy is her mother, however she won't openly admit it.