My mum and dad both know, because I told them, years ago. Not exactly in the best way, but they know. They just don't WANT to know. My dad not especially. I have a sort of unspoken agreement with my mum that I can do what I want, as long she doesn't find anything and I keep it to myself.
I also told a close friend, two summers ago, and he's kind of weird about it. I mean, he teases me about it ocasionally, (in a nice, none hurting kind of way) but when I ask him whether or not he wants to know more about it, or if he wants to pretend I never told him, he kind of distracts me and we end up talking about something else.
My friend is the only one who knows, who I talk about it occasionally. But like I said, he's kind of weird about it sometimes. He isn't very computer smart either, so I don't think he could google this lifestyle at all. Also, I made him swear/promise not to tell his wife, because it's a 'secret' between the two of us.
I don't think he has, but if she knows, she hasn't mentioned anything about it. And hopefully she'll never will. It's not that I don't like her, but I trust my friend. He's an old classmate and all. His wife... Well, she's more like an aqaintance than a friend if that makes any sense?