@klibertp she's not really calling HIM disgusting. She just realizes how much she loves her sister (Valerie) and she no longer wants to hold Kylus in high esteem as she did before. Hope that helps!
Man, author got us real good. I think most of us thought that Edith was the little bratty sister trying to steal Duke Dewello from Valerie. Turns out she's just really misunderstood. Middle child syndrome right here.