"Astoria is cheating on me," he said. "I don't know what to do." There were dark circles under his eyes and even though his hair was clean, it was disheveled. Hermione put her small, cool hand on his shoulder. "You do what you have to. Not what's expected of you. Not what's easiest. But what's best for you. And it will most likely be dreadful, but you won't be alone." / EWE

Terrible things happen when wizards meddle with time, Miss Granger. Particularly to those caught in their way.