Magdalene Waverley

Baroness Magdalene Waverley is Sarah and Lynn's aunt. Together with her children, Thomas and Mary, they play as the antagonists of the story. She wants to marry the Viscount Marble in order for her family to be incorporated in the nobility. She turns a blind eye to her children's wrongdoings while heaping the blame on Lynn. Her family is very wealthy and is capable of paying off George's debts.

(Source: Wikipedia)