According to Hick, why is Eleanor's relationship with Anna filled with tension in the novel, White Houses?

Hick notes that Anna's relationship with her mother has always been tense due to her obvious preference for her father. "The only thing that mattered to Anna was being bathed in the sunshine of her father's love," Hick explains, "...If her father were Stalin, Anna would have been cheerfully counting up dead Jews and chilling the vodka" (81).