Devotion to parents

As a Buddhist, I believe devotion to mothers is very important if we want to have a good life. Since I was child I followed my mother's instructions until I became an adult. This included getting married and having a child. Now that I'm an adult, I think I need to become more independent, and to make my own decisions, both for myself and my son. However, my mother is very upset and thinks I’m arrogant because I’m no longer follow her rules. Am I wrong if I create my own rules for my life? Am I a very bad daughter?