First For Edward
Twilight, Edward/Carlisle, she can never have you because you're mine
Edward isn't blind, and he sees the way that Esme looks at Carlisle, and he hates her. It goes too far when Carlisle with his compassionate nature, tries to save her one too many times – but Edward stops him with his words.
"She can never have you because you're mine..." and Esme dies forgotten, while Carlisle only has eyes and love for him.