Thanks for your answers...
Today we had a phone call from the school asking his mother to come at school to get the results, and saying that he was spotted outside the school while having faked a doctor notice saying he was sick, which was done by his girlfriend.
When confronted to this he said "okay", and he started to be a bit sarcastic and isolated himself in his room... He knows this has gotten too far I think. His father also found pictures of him on the internet in nightclubs while he was supposedly sleeping at a friend place so I think difficult times are coming. His father is convinced that he is using drugs, weed or ecstasy.
My wife said earlier that she did not expect to have to have the "if you're not happy with the house rules you will have to move" so soon, like a couple of weeks after he turns 18...
I have to take care also of myself because my stress level (and I work a lot) are very high due to this...
