Harry Potter and the Order of the Phoenix
"How come she married him?" Harry asked miserably. "She hated him!"
"Nah, she didn't," said Sirius.
"She started going out with him in seventh year," said Lupin.
"Once James had deflated his head a bit," said Sirius.
"And stopped hexing people just for the fun of it," said Lupin. (29.208-212)