Have you ever noticed what a huge role jealousy plays in fairy tales? In Cinderella , our heroine has to stay home and clean out fireplaces because her stepsisters and their mother are jealous of her. In Snow White , we have an evil queen, jealous of her stepdaughter’s youth, beauty, and sweet disposition. Even Sleeping Beauty begins at the baby’s christening, at which fairies are invited to be her godmothers, but another fairy who was left out is jealous and curses the baby instead.* Jealousy is a classic motivation in stories, especially murder mysteries and thrillers. Shakespeare called it "the green-eyed monster." It also pops up a lot in the romance genre, but I sometimes find it troubling. It’s often used as a signal to alert the main characters they’re starting to think of the other as more than a friend, but it can easily cross the line into creepy. Have you ever read about a heroine who interprets the hero's jealous behavior as proof of love, while your i...