Mansfield Park by Jane Austen

Fanny Price is born to a poor family, but is sent to her mother's rich relations to be brought up with her cousins. There she is treated as an inferior by all except her cousin Edmund, whose kindness towards her earns him her steadfast love. Fanny is quiet and obedient and does not come into her own until her elder cousins leave the estate following a scandalous play put on in their father's absence. Fanny's loyalty and love is tested by the beautiful Crawford siblings. But their essentially weak natures and morals show them for what they really are, and allow Fanny to gain the one thing she truly desires.