Create a serene and picturesque watercolor painting of a tropical sunset by a tranquil lake. The scene should include a silhouette of a woman standing waist-deep in the water, her arms raised as she gazes at the setting sun. The sky is a vivid blend of warm oranges, reds, and cool blues, with clouds reflecting the beautiful hues of the sunset. On the left side, include a rustic thatched hut with a few details like a hanging lantern and some vegetation. The water should reflect the colors of the sky, creating a harmonious and peaceful atmosphere. The overall composition should evoke a sense of calm and natural beauty, with soft, flowing lines and a rich color palette.