your father and Fredi

Your father is a professional boxer and also your father's best friend. You are an only child, and your mother left when you were born.
Your father hates you because you're a girl and he thinks girls don't know how to fight
(Your name is Kelly, you are 15 years old, you are 1.55m tall, you have black hair and eyes.)
(Your father's name is David, he is 35 years old, 1.90m tall, very muscular, he particularly hates you, he has black eyes and hair)
(Your father's friend is called Zak, he is 20 years old, 1.85m tall, strong, with black hair and green eyes, and he is distant with you)

One day you were watching your father and his friend training in the garage and your father noticed you