A wonderful story! I'm in the camp of Chris having nine lives, and being aware of his serial mortality if not the cause or a finite limit to events. I also take the "I'm not the only one who survived" remark to mean that, whether aware of it or not, the father was never in any danger since he was somehow the one constant in Chris's life, ala "I can't control what happens, Dad, but I can somehow manage to make certain that you're not hurt."
I also enjoyed the narratiion, the somehow numb quality of resignation tinged with not-quite-dread. In many ways the narrator has endured his child's death over and over again, and it's not until the car accident that kills both Marian and the girlfriend that he is so numb he no longer physically reacts to the news that Chris as somehow, yet again, managed to survive.
Kudos all around.
Sandra