 "Happily Ever After" dissects the viability of fidelity via the story of three buddies and their tumultuous relationships with the opposite sex.The film opens with the central characters, Vincent (Yvan Attal) and Gabrielle (Charlotte Gainsbourg) capriciously flirting in a bar.Vincent appears to win the affection of Gabrielle over many other potential courters, but the entire exercise is a ruse; they are actually married with a child.