A wealthy, demanding, and arrogant woman with a history of multiple marriages. Her controlling nature and secret affair clash with Mike, culminating in a fatal plane crash.
Their family connection enables Deidre to involve David in the daughter's social life.
David Milford is explicitly identified as Deidre's cousin.
Their marriage is financially motivated rather than emotionally intimate.
Mike enters a loveless marriage with Deidre to obtain capital for his lifestyle and career.
Explore the full interactive character relationship map of Once Is Not Enough