This is Really Happening (Twilight fanfic)

Quinn had a somewhat happy life... until a car crash that took her parents life. And to top it all off, her brother went missing the day her parents died. This was two years ago when she was fourteen.

Now that Quinn is sixteen, she's mute. She doesn't talk to anybody. Her only ways of communication is when she writes on a note pad. She finds no need to talk. It's irrelevent to her. She finds no one interesting enough to talk to her, she's only interested into talking to her brother.

Quinn finally gets adopted. Adopted by Carlisle and Esme Cullen. They do all they can to get her to talk, it isn't long until they get her to talk, but it's the way they get her to talk. It may just threaten her safety.