10. Brazil – 38%
Brazil is a nation celebrated for its vibrant culture, carnivals, and passionate energy, yet infidelity is relatively common, with 38% of married women admitting to cheating. The emphasis on romance, flirtation, and nightlife in Brazilian society can sometimes encourage extramarital relationships. Social freedom, urbanization, and widespread use of dating apps create ample opportunities for secret encounters. Despite strong family traditions, Brazilian culture’s focus on enjoyment and spontaneity contributes to its high rate of unfaithfulness.