mary became pregnant. while she was expecting the baby, darnley and his friends got drunk one night and decided to kill david rizzio. they came into mary's private rooms at holyrood palace while she was talking with rizzio and they stabbed him to death. darnley got away with the murder because he was the queen's husband, but mary never forgave him for murdering her friend rizzio and avoided being with him again. when her baby was born, it was a boy, who would later become king james vi of scotland.