Nathaniel was born to a seemingly charmed life. His father, Nicholas "Nicky" Mordue, was a handsome, youngish, extravagantly charming darling of society; his mother, Cynthia, a delicately beautiful and elegant heiress. By chance, Nicholas' older brother Alexander and his wife Avery had a child in the same year, Nathaniel's cousin Sylvia, which led to the two cousins growing up almost like twins. Nathaniel grew up doted on by his mother, enchanted by his father, devoted to his cousin, and generally very happy.
Beneath the surface, however, things were less idyllic. A younger son with no responsibilities and a great deal of indulgence from his mother and resentful of his brother and wife for having inheritances, Nicholas struggled to maintain a healthy relationship. Their marriage, unsteady from almost the beginning, began to deteriorate after the birth of Nathaniel's younger brother Jeremy. Nicholas swung back and forth between periods of near-unrestrained hedonism and returning home out of guilt, usually showering his wife and sons in gifts when he returned. Cynthia retreated into her boudoir, often taking to her bed with migraines, which led to Nathaniel becoming a nervous, quiet child at home, always anxious about his mother's health. The family maintained a mostly happy front, however, until Nathaniel was nine, when Nicholas had had enough: he eloped to the tropics with his secretary, abandoning his wife and sons and cutting contact with his family.
Overnight, Nathaniel's life was turned upside down. In the tumult, he latched onto remarks made by his mother - that she needed him to be good for her, that she didn't know what she'd do without him - and became determined to always be the perfect son and head of family - to be 'strong,' unlike his 'weak' father who had run from his responsibilities.