City of Bones
How we cite our quotes:
[Clary] could see how she was hurting [Alec], and it made her glad. Someone else ought to be in pain for a change. (16.46)
Um. Yikes. Someone needs to take a deep breath and count to 10. Or 10,000. This is a little moment of romantic revenge, which is the best kind of all.
"Don't you ever," [Alec] whispered, mouth a blanched line, "ever, say anything like that to [Jace] or I'll kill you. I swear on the Angel, I'll kill you." (16.47)
We'd love to get the Angel's opinion on this to know whether he or she would condone this violent pledge. We admire the loyalty, but not the threat.
"Perhaps [Luke] saw an opportunity to turn the tables. To hurt [Jocelyn] as he'd been hurt." (18.138)
Even though he loves Jocelyn, he might still get mad enough to hurt her. At least, that seems to be the working theory here. And why shouldn't it be? Everyone else in this book seems motivated by revenge.