Stephen's brothers and sisters at least have the excuse that they're independent adults who can't make it to every one of their siblings' events. The parents, not so much :/

Leona doesn't always show great judgment when she's high, that's all. And they're in a subculture with a really warped sense of boundaries.

Stephen keeps getting manipulated further into this mindset where doing nothing seems like the safest option, if not the only option. The longer it goes on, the harder it's going to be to fight his way out of it...