The stepmother in the coloring page looks incredibly elated. She stands among other figures with with her arms raised high, triumphant and surrounded in a triumphant aura. Her bright smile shines above all others in the scene and her joy is so infectious that all around her are beaming as well. From the bouquets of flowers given in congratulation to the determined look in the stepmother's eye, this scene speaks volumes without words.
As for how to color the page, I would start by creating a muted but warm background with earth tones and subtle gradients. This would contrast vividly with the remaining colors, which would be richer and more vibrant. I suggests shades of ruby red, deep violet and bright yellow. The stepmother's skin should be a pleasant honeyed gold tone, and her hair a warm, rich brown. The bouquets of flowers should be given a rich and diverse blend of colors, to further highlight their significance in the scene. I envision warm blues, and earthy greens providing a lively and inviting atmosphere.