Envision a professional, high-quality art nouveau illustration depicting a mature, voluptuous 40-year-old French woman in a revealing, flowing dress adorned with intricate floral patterns and delicate lace. The art style is elegant and ornate, with fluid lines and soft pastels that emphasize the graceful movement and detailed design of her attire. Her long, wavy, chestnut brown hair cascades down her back, and she has captivating blue eyes with classic, refined makeup, including soft pink lips and a hint of blush. The background features an elaborate Parisian garden with blooming flowers, wrought iron gates, and art nouveau architectural elements, bathed in the soft light of a spring afternoon. The composition captures her poised, sophisticated stance and the exquisite details of her dress, exuding an aura of timeless beauty, cultural refinement, and artistic elegance.