Are these behaviours of my parents normal? Someone tell me what is going on?

There's nothing at all wrong with you, Jilly Cooper. It's your nearest and dearest who are strange. You have been advised to run. I think that you should take that advice. Just think about what might, what could, happen if you stay in the company of your blood relatives. Find yourself a safe haven, get in there, lock the door, and do not tell your family where you are.