She told me a story once, when I was visiting them, and he was still a child, about how she had given him a hug and he had said to her, "Mommy, when you hug me, hearts fly around my head!"
I can't imagine what she's going through. I can't imagine anything that will help her or ease the pain or make any difference to her grief right now. How do you deal with something like that? How would you ever get up off your knees?
Rest in peace, Chris. You will be sorely missed.