They might disinherit you for being disrespectful? That’s insane. Did they threaten you to do that? If the relation is that bad I can understand why you would care. My parents would just think I’m being weird.
I hadn’t thought about a DNA test, but I definitely don’t see how it could help me with my life. If it comes positive, nothing changes. If it comes negative, I don’t see the administration doing anything about it. They won’t even know you passed a test, even if they had procedures for these cases. You or your parents would need to bring up the issue in a legal procedure for the administration to consider it.
What I mean is that if you have issues with your parents or tutors, knowing what they are exactly does not fix the issues by itself (surely there is a better angle to think about it?). I understand that you would think about it, but if you don’t like thinking about it, I think you usually don’t need to invest yourself into it. Like, you can keep the obsessive thought without worrying about it. And that will make it stop over time. I don’t know how much sense this makes, it made sense to me back then :shrug: