I know how you feel. I feel like if my kids knew about my pot smoking they would think less of me. They would probably be concerned and I don't want that for them.
It's one of the reasons I want to quit so badly. I'll be 40 this year and I hope I can start my 40's off right. Smoke free for the long haul.
I just read your quit thread and it looks like you'll be at 9 months here in a few more days. That's alot to be proud of! It's great and I think your son would definitely agree as well.