Shame on you

the long version

"Caroline Stern is just like any London teenager. Except that she lives in a religious sect. As a child of 'The Organization' her every move - from what she eats to when she talks and whom she'll marry - is dictated by her elders. But as Caroline's free-thinking ways bring her into conflict with terrifying Miss Fowler and brutal punishments push her to breaking point, she acts on a terrible impulse and exacts a horrifying revenge. Twenty years later Caroline is living with her lover, Joe. He knows her as Lorrie and is unaware of the troubled childhood she's left behind. Until an old friend reappears and Caroline discovers that the past isn't so easily buried."--Publisher description.