ah yes, the i'm gonna dress up like a fucking whore, and enthusiastically seduce my step-dad, to the point of initiating sex myself, as a way to create proofs me being abused!!! what did bro expect? this kind of shit only work if the guy actually abuse you, if you're doing all the seducing, it's just called making a porn movie.
arguably, he's lucky the guy is a fucking morron, because otherwise he could have just acted like he wasn't aware of the camera's presence, and then turn it off. it literally would have been nothing but a porn involving him seducing his step-dad, meaning it could have been used as blackmail AGAINST HIMSELF. what kind of fucking idiot end-up accidentally making blackmail-material about himself???