She is my younger sister

My (Nuclear Family) has four members My Father, My Mother, Myself and My Younger sister in order from bigger to smallest . So first I would like to introduce my father works in air force and is of 40 years . I like him . My mother is a housewife and is of 37 years . I like her also . I am a boy who goes to to St. Clare’s Convent High School . I am of 11 years and my sister also goes to St. Clare’s Convent High School and she is of 8 years .