The Headmaster informed her that Albus claimed that "love’ is what protected Harry, and would eventually be the thing that would undo The Dark Lord. Maybe it was her upbringing, or her witnessing Amycus Carrow use the Imperius Curse on Slytherin students accused of sympathizing with the mudbloods for the prurient pleasure of those who obtained the Dark Mark already, but love isn’t real. Love is a ruse, a Trojan Horse that only brings pain.