Where does the law stand there? No one knows.

Be even worse in a few years when the paltry votes they scrounged up with this move are long forgotten and the law continues to punish and hurt people for literally no justifiable reason.

Imagine you and your partner do make sexy videos but then your respective parents hook up.

The videos were made when you were not step siblings, but now you are.

This is essentially my understanding of the origin of the trope. When I was growing up, both me and every single kid I knew's parents were already or in the process of either getting a divorce or remarrying.

So situations like Clueless and Drake & Josh were the norm, and it makes the trope all the more hilarious.

Well how could it not be? Genetically it's just two random people, what would be the basis of making it illegal if at some point your parents hit off?

Ah thus is about the porn nobody is actually a step sibling.