I always wonder if I’d be the same person I am today if my parents hadn’t exposed me to sex from a young age by openly fucking and doing BDSM around the house, if I hadn’t had unsupervised internet access, and if I didn’t have friends with just as dysfunctional families feeding off each other’s bad habits. I feel like I grew up too fast and didn’t really mature at the same time, if that makes sense.
Kids will find anything normal if the people around them act like it’s normal. The problem for OP was mostly caused by the disconnect between what her parents appeared find normal and what (most of) the rest of the country she lives in find normal.