I told my mom (I tell my parents everything, we have a great relationship, I'm very lucky) like this.

Me: Hey Mom, I want to tell you something.
Mom: You smoked pot didn't you?
(This came randomly out of the blue and kind of caught me off guard)
Me: Umm.. yep. Just wanted to let you know.
Mom: Well you know I don't like it, but just be careful, don't let it screw your life up, and don't get in trouble because of it.
Me: Thanks Mom, I love you.
Mom: I love you too.

My Mom's the coolest. She actually confessed to me a couple weeks ago she still smokes every now and then.. I was like... you've got to be fucking kidding me.. my Mom smokes reefer? So I asked her if she would want to smoke out sometime and she said sure. So whenever I get some more we're going to get stoned together. Ahhh quality bonding time.

Oh, and by the way I'm 18, in college, and living on my own.