Aww, I'm so sorry you're going thru this! Probably gonna repeat what everyone else says.
I don't have kids but I can tell you from my best memories as a kid I don't remember my favorite gifts or how many, I remember my family being together, getting to see my grandparents, lots of FOOD, the traditions that made our family unique ... all of the NON material things and I bet ya anything your kids will do the same.
I had aboyfriend a while back who ended up addicted to heroin and in rehab, his mom and I went to naranon and/or alanon meetings together and it REALLY helped! You are w/ people going thru the same thing and learn how to deal w/ the addict w/o taking on responsibility for their choices, so that you aren't consumed. He's young enough there is still hope for him, in the mean timetho maybe you could find out where local meeting are for your parents and you.
If you ever need to talk please don't hesitate to pm me, I will giv eyou my # (I have free long distance so no worries there) and email etc.
\"As soon as you trust yourself,you will know how to live.\"
Johann Wolfgang von Goethe
\"Do not anticipate trouble, or worry about what may never happen. Keep in the sunlight.\"
Benjamin Franklin