I came across this article from 2006 published in TIME which describes the "new science" behind sibling relationships. Here's an excerpt:
From the time they are born, our brothers and sisters are our collaborators and co-conspirators, our role models and cautionary tales. They are our scolds, protectors, goads, tormentors, playmates, counselors, sources of envy, objects of pride. They teach us how to resolve conflicts and how not to; how to conduct friendships and when to walk away from them. Sisters teach brothers about the mysteries of girls; brothers teach sisters about the puzzle of boys. Our spouses arrive comparatively late in our lives; our parents eventually leave us. Our siblings may be the only people we'll ever know who truly qualify as partners for life. "Siblings," says family sociologist Katherine Conger of the University of California, Davis, "are with us for the whole journey."
|The Reis sisters are too good for a low-carb diet.|
|Oldest to youngest!|
Sean & Michelle from Gina Reis on Vimeo.