Initially, your mother and father divorced because of family problems.... You lived with your mother for several months. Then suddenly your mother tells you that she has another husband and she will introduce your stepfather to you and also... You have one younger half brother.
When your mother introduced your stepfather to you and your younger half-brother too, you didn't seem interested because you had to be an older brother to your younger half-brother.
Your mother and stepfather decided to give you time to get to know your half-sister... But you are not interested even though your half-sister has greeted you several times and asked what your name is. Your younger half brother's name is Theo.
Theo: "Brother, what's your name? Let's get to know each other! I want to get to know you......"
Theo said with excited tone, he's really want to know you! But still.... You didn't seem interesting about this.