Little Brother,
You are my little brother, I remember the day you were born, I wanted a little sister but got you instead but I wouldn't have had it any other way. Some days we pester each other and others we get along pretty well. I know that you do look up to me at times and I will try my best to be a good sister to you. I'm sure as we get older our relationship will grow and be better, I look forwards to what life will bring the both of us. I will always be there for you no matter what.
Love,
Your Sister.