<human>: Can you summarize the given text in a few sentences?

Hey Reddit. 

My parents have recently found out one of my secrets. A secret I would rather not have them know. What secret has someone found out about you and how did it happen? Sidenote: Could of course be anything, not just drugs like mine.

Lets start of with some background. So I'm 20 years old and recently started living on my own in Amsterdam. I started smoking weed about 4 years ago and I currently smoke weekly. I smoke because it helps me deal with stress/anger and and makes me feel good. I have never discussed weed or any drugs with my parents but I know they are against all drugs by their reactions to the news, etc.

Last weekend: I went home south to visit my parents and friends for the weekend. Friday night, nothing to do, one of my mates wants to go to a coffeeshop for a smoke and I go along. Have a nice evening talking to the owner of the shop and get home at about one in the morning. Put lighter and weed, nothing more since I don't smoke cigarettes, in my backpocket and enjoy the rest of my weekend.

Skip to monday morning when I'm arriving home in Amsterdam. Look for my weed to store it with the rest of my stash, can't find it anywhere. Check my back pocket and can't find it, think nothing of and assume my mate has it.

Today. Exchange several e-mails with my mom about uni, etc., all is well. Four hours later I get a random e-mail from my mom about laundry.

Subject: Laundry
*I have found a lot of things in your pockets, but the lighter in your backpocked is now clean and it still works.

Love,

Mum*

This was the entire e-mail, no more, no less..

Oh crap! So I'm 99% sure my parents have found out about me smoking weed, haven't got confirmation though. I'm sure my weed was in my back pocket since I've always put it there.
<bot>: Been smoking medicinal shrubbery for several years to stop me from turning into an enraged bear-viking. Hid this from my parents and the recently found out.