Once my parents found out I smoked weed they were pissed because...
1. I was pretty young and
2. idk they were scared or something.
That was back when I was 12 or 14 though.
Now my parents could care less but it is their house and I respect that. So I smoke outside when I visit them. Might want to think about that.
Otherwise when I tried to get away with it I am pretty sure they knew and just didn't say anything. I tried smoking in the bathroom with the extraction fan on while blowing the smoke into a papertowel tube stuffed with fabric sheets, lol. It worked for the most part. Like I said though they probably just didn't say anything.
Welcome to the forum!