Elegant eighteenth century lady in a dramatic velvet portrait

"Create a portrait of a lady from the 18th century, with a sense of dramatic elegance. She is wearing an intricate, vintage gown made of rich velvet, with delicate lace detailing at the collar and sleeves. Her hair is styled in an elaborate updo, adorned with pearls and ribbons. Her eyes are wide open, expressing an intense mixture of wonder and surprise, as if she has just witnessed something extraordinary. Her lips are slightly parted in shock, with a faint smile that hints at a hidden secret. Her posture is poised but reveals a subtle tension, as though she’s caught between delight and disbelief. The lighting is soft, with a golden hue, highlighting her delicate features. The background is a soft blend of muted pastels, suggesting an old, grand room with vintage furniture like a velvet armchair and a window letting in a gentle light, adding to the air of mystery and intrigue."