Yeah right because there's totally an incest tag. But not that it matters, I can say I'm tired of the infatuation regardless, especially when it doesn't do anything but a shit take of it. I can see the subject be used just fine as some sort of character flaw, but thats not how this is framed, instead it's going for "cutesy/sexy/funny".
It's not that incest is in any shape or form integral to tell a compelling story, it does absolutely nothing for the already weak story but try to add some semblence of social conflict that could've been anything else.