They are a married couple whose shared household anchors Lady's domestic life.
The plot identifies Darling as Jim Dear's wife, and later describes them as a couple caring for their baby.
Darling is Lulu's mother.
The plot states that Darling gives birth to the baby girl Lulu.
Darling is one of Lady's primary owners and caretakers.
Darling receives Lady as a Christmas present and later helps bring her home from the pound.
Aunt Sarah acts within Darling's family circle but mishandles Lady's care.
Aunt Sarah dog-sits for Lady while Darling is away with Jim Dear.
Darling accepts Tramp into the family.
Darling follows Jim Dear to rescue Tramp and joins him in adopting Tramp as their own.
Explore the full interactive character relationship map of Lady and the Tramp