AIBU to suspect DS of smoking weed in the day

[Claybury]

If he returns home from school and often has a nap? I know he smokes at parties and at weekends so I'm worried. Or is this normal teen behaviour - being tired from school.
Personally I could always nap in the afternoons but I'm not 17!

My friend used to sleep after school every day and never smoked any weed.

Why are you about it at the weekend and parties but not after school?

I'm not ok about it ever. Hate it. However I would would see weekday smoking as a serious escalation of a problem. Partly because it would start affecting school work and partly because it's getting more habitual.

Have you asked him?