>inb4 the dad had an affair with the father's friend's wife making them half-siblings
>inb4 the mom had an affair with the father's friend making them NBR again
That's a yikes from me my dawg. spending a decade and a half thinking you're siblings and then thinking it's okay to bone each other the second you find out you're not related by blood hardly takes this out of the incest tag by a technicality... i can't see this as anything BUT incest