Ever thought that your parents don't have to worry about you? When parents talk about one of their children it is usually because they want to send a message to that sibling. Don't get all hung out about it. If it really bothers you, why don't you ask them why your sister is the topic of conversation when you too have accompishments that you are proud of. Stay positive, life is too short to get bent out of shape. You are good, you are YOU and you are a Chef (what could be better). Enjoy every day of your life to the fullest.
Chezsylvia