There are many important things in our life but family is one of the most important thing. Without family there is no happiness in life. We all grow up fighting with our brothers and sisters, sharing our secrets with our mother, playing with our father and we enjoyed every festival, every happiness and sadness with these people called family. Some things we get to choose but family is one of those thing that we cannot choose or change it, if someone is your brother he will be your brother for rest of your life. When you got promotion which person you will call ? if you are not married ? I think you will call your mother or father because you know that with your success your family will be happy. and if you are married then obviously you will call your wife because she is your family too.
I have seen while growing up most people change their love for family members, like when you are little child your love is with your grandma/grandpa and mother, before teenager you love your father when you are a teenager you love your brothers and sisters and when you are adult you love them all. After your marriage your love changes it does not mean you do not love your family, but it means that at that point the most precious thing for you is your children, like your father and mother loved you. Always love your family no matter what because life is too short enjoy its every moments.