How does this shift in the baby’s color impact Armand? Where else does his reaction become affected?

When the baby is about three months old, Armand's behavior abruptly changes: he absents himself from the home, and when he is at home he avoids Desiree and their child without any excuse. Desiree is flustered and taken aback when Armand accuses her of being partly black. One day, Armand walks into Desiree's room, and without noticing her, goes to a table and begins searching among some papers. She calls his name, and having realized what her mother had said about the baby, she asks Armand what the color of the child means. Armand replies that it means that the child is not white. It means that Desiree, Armand continues, is not white.