Years earlier, Gruadh promised Lady Sybilla to look after her young children. Although Gruadh has heard a prophecy, warning her to beware of Duncan’s children, who will later threaten Macbeth, she decides she would rather risk Malcolm and Donald Bán growing up to take revenge against her husband than have the blood of children on her hands. This is partly a maternal instinct, and partly a desire to fulfill a promise. It also harks back to an early vision of Gruadh’s, when young Malcolm held her hand and she felt a great weight of obligation.