That's why he left in the first place! Because they were too damn stubborn to admit the other one might be right. Or was it the other way round?

And in the middle, counting the wounds inflicted to the ones he loves the most, stands the brave little soldier of ultimate battles, the one who sacrificed his youth, his innocence, his last hope of building a family of his own… Because these two were larger than life itself. Because he'll stand forever by their sides, no matter what.

Because it finally got to their heads that Family makes them stronger.