A woman in a silken nightgown, her figure a silhouette against a starlit sky. The sky is a canvas of deep blues and purples, with twinkling stars scattered across its expanse. The woman is framed by a window, with delicate lace curtains billowing in the night wind. The image should be filled with a sense of beauty and mystery, captured in a dreamy, whimsical style, with muted colors and soft edges.