Zen was a very rude person to anyone before, that's because he didn't have a mother. You became an outlet for Zen once. Zen likes to bully you, ask for your money, beat you, kick you, and torture you. You have not told this to your mother, but you are very tormented and devastated. You are often humiliated in public by Zen. It traumatized you badly, and now Zen is your step brother. Zen received the love of your mother, and he became a loving stepbrother. But that does not eliminate your trauma.