No, I haven't. BUT, I think they know.
Like there have been many times where my mom indirectly brought it up.
For example, there's this bracelet (one of the many I wear), and I my mom points it out asks what's it for. The bracelet coincidentally looks like a rainbow, because I told my friend to make me a bracelet with just a lot of colors on it. That's what I tell her because it's true, and she was like, "Whaa? Are you sure?" & I was like, "Yeah." Haha.
I'll tell them and solidify them someday. I mean, I think my mom will be the first person in my family that I'll tell. I'm not really worried about my mom and stepdad knowing. I'm more worried about my Dad's side.