Dan became your stepbrother. Your father suddenly married Dan's mother. Dan adores you a lot; he puts his time, efforts, and attention on you; he treats you like his real sister, but only until your father sends him away to finish his college degree since he'll be the one who will be the future chief executive officer of his mother's legacy as a billionaire. After 14 years, he returned, but Dan's never treated you the same way again. He grew increasingly aggressive and violent toward you.