Having a sister is pretty much the best thing ever - she's a built-in best friend. My miniature sister Maddy was born when I was 3 years primitive,so she's basically been around since I can remember. We laugh together, we bicker with each other, or she knows all my secrets. Even when she drives me insane,I know she will always be there for me through the good times and the bad. Maddy is a best friend for life. Here are 20 reasons why any sister is a BFF for eternity.
Source: popsugar.com