Edit this photo. Change only the mouth and facial expression of the woman riding the horse: close her lips into a calm, natural expression with a soft closed-mouth smile — no visible teeth. Keep everything else in the photo completely unchanged: her face shape, eyes, eyebrows, nose, skin tone, hair and how it's blowing in the wind, jewelry, off-shoulder blue dress, pose, arms and legs, the rearing black horse, the beach, waves, sand, pebbles, sunset lighting and sky, and the overall composition and camera framing. This is a realistic photograph — keep the same photographic, natural look, not airbrushed or smoothed.
