Sweet romance & zombie apocalypse: Should the genres mix or not?

  https://www.youtube.com/watch?v=sAXt8TzS1Hw What if a writer is inspired to write two stories that fall into two different genres? Should they write both despite the fact that their readers might not follow one of the genres? Or will fans of an author be interested regardless, provided there is a common thread they like that runs through that particular writer’s work? Check out this video and find out!