After all you have brought him up to know right from wrong.
Yes, you've done as much as you can as parents...and now at 18 you can only hope and pray that it sticks!
Good job getting him through 12 years of schooling, you should celebrate as well!
We went through it two years ago, funnily enough, our 'country boys' were ready to come home after a few days, and we will be going through it again next year!
Good luck and I hope you get to hear lot's of stories on his return!

Dee.