the.com/trophy wife

means A younger, glamorous spouse (usually a wife) whose presence signals the husband's wealth or status as much as any romantic bond.

from The phrase was popularized in the late 1980s, notably through a 1989 Fortune magazine cover story that used it to describe the attractive young wives of powerful executives — treating marriage itself like a trophy case display. 'Trophy' here draws on its older sense of a prize or spoil won through conquest, so the term casts the wife as an acquisition that advertises the husband's success rather than a partner in her own right.