As I said no ideas without vulgarity. The easiet way would be to break her mind and as described right now I can see many ways of doing so. I would say the easiest to pursue would he solitary confinement where she can't get attention. A padded room, have her strapped to a table so she can't harm herself, her mouth have a oiece in it so she can't bite her tongue or speak and she'll he fed through a tube and cleaned by nurses. She'd be broken in days most likely.