My strange family

 My family is strange because my mother and my sister work together and my brother works in the UK. My father works all around the world as a scientist. My family members are father, mother, two sisters and one brother. My mother and my father are thirty, my brother is fifteen, my sisters are twins and  they are seventeen.              
My mother and my father are thin and big, my brother is big and thin, my sisters are small and thin.
This is my family.