[hoherd]

In a similar vein, imagine the step parents aren't married, they're just platonic friends. They would probably be overjoyed if their children connected romantically.

Also, I can just see the industry changing from "stepbrother" to "my mom's boyfriend's son." Suddenly if the parents aren't married then it's not illegal. What about if the parents are divorced? Does ex-step-sibling count? The whole thing seems absurd. These are works of fiction that have not "graduated", as Preet Bharara would say.