The Blue Veil.

War widow LouLou Mason accepts temporary assignment as nursemaid to infant son of corset manufacturer Frederick K. Begley. When she declines Frederick's proposal, he marries his secretary Alicia Torgersen, who fires LouLou following her honeymoon. LouLou finds employment with wealthy Henry and Fleur Palfrey and begins to care for baby Robbie. Years later, LouLou accepts responsibility for the boy and raises him as her own.