Heart Touching Birthday Wishes for Sister: Sister is the person who understands you better. She has always been closest friend, best critic and biggest fan, all the time. She has a habit of quarreling about small small things in life. This is the way sisters express their love to their siblings. They are as expressive as any other female in the universe. Hence, these heart touching birthday wishes for sister have existed for us to collect the bundle of wishes and present you in one place.