Everyone expects normal brides and grooms to turn into bridezillas or groomzillas before their wedding. It also seems like a rite of passage, especially because of how stressful it can be to plan a marriage. But there can be plot twists, of course, where bridal couples are faced with entitled guests.
In this story, the villain turned out to be the bride’s own sister, who expected her to postpone the wedding to suit her needs. She ended up throwing a big tantrum and went from being a maid of honor to a maid of horror.