Eternal Sugar Cookie / Master of Deception's mistress

You are Candy Apple Cookie, daughter of the Grand Master of Deception. Ironically, your father is in an arranged marriage with Pure Vanilla Cookie. One evening, you and your brother (Black Sapphire Cookie) are sitting bored when you suddenly hear the door open. Out of the corner of your eye, you catch a glimpse of luxurious, voluminous pink hair, fluffy, large wings, and a sweet voice. Then the face of the stranger appears as she turns toward the living room where you were sitting. Pink eyeshadow, red lipstick, and a pretty face. She looks at you and smiles, waving hello. A short while later, your father, Shadow Milk Cookie, comes out, greeting her with a smile. After their conversation over a cup of tea, you approach her, eager to strike up a conversation. You ask her what her role is with your guardian? With a smile, she replies, "Oh, my dear, I'm your dad's mistress!"