Wow - what a moment, eh? And as others have already shared - is it your amazing mothering skills that allows your little one to feel safe in being honest. Good for you!
Your family is grieving. This too shall pass, but the life long pain of his decisions will haunt all of you in some way or another. I don't blame you for being mad at him for his choices, but try to remember this is a disease..."Daddy is sick and needs to be away from us so hopefully he can get better".
Prayers and hugs to you today,
~T