Why Is This 5-Year-Old Big Sister Crying About Her Baby Brother? [VIDEO]

This 5-year-old-girl is very upset about her little baby brother. What could he possibly have done to at this cute age to drive her to tears? Well it's not what he's done. It's what he's eventually going to do....someday.

Poor Sadie. Watch the video and tell me if you don't say "Awwwwwwww!"