It hadn't ever hit them, nor did it really ever come to mind so much. But when one friend tells them a story of their time passed, they all take a good look at themselves; and more importantly, their priorities. Because, in the end, you only have one family, and in their case, such important siblings. And it doesn't always have to be your elder that changed your life...
Now ask yourself for just a moment, have you taken the time to change your own priorities?