Everyone in my family knows (I mean, I live at home and spend dozens of hours a week sitting at the living room table drawing it, hahaha) but my parents don't read it. They'd really like to read it, and there's nothing in it that they wouldn't support (I think, anyways) but I don't let them because I've never liked letting adults read my comics. Same goes for my grandparents, haha, I gave them copies of the art, actually, but they aren't allowed to read it. Again, just because I'm shy and awkward. My parents and most of my grandparents are SUPER DUPER supportive anyways.
My siblings are a completely different story. I have five of them, and they are all forced to read it over and over and over and over again. They help me out with a lot of editing⦠I even use my 7-yo brother to check how followable it is (if he can't read the speech bubbles in order or can't describe what the actions on the page are⦠I redo it. Gotta make things readable haha.) I also pay one of my sisters to flat my pages pretty regularly. My siblings are great and they're very patient, especially since only one of them is actually interested in comics, and a couple of them flat-out hate comics and reading, haha!!