When I saw this quote, I immediately thought about Kitty Haskell and her sister, Rose MsSweeney. Their relationship is complicated yet still based in a deep love.
Your sister should be the first person you call when you need to hide a body and the last person to lay blame in your lap.
elizabethhein.com 
Ha! That’s great–the first person to call when hiding a body and the last person to blame you. 🙂 Sisters in fiction can show a really strong bond…or a really competitive one!