Marked Ones

Eugene, a 18 year old female is the leader of the Winged Lilies coven in Melbourn, Australia, the most powerful and influential coven in the world. As a baby her parents where expecting and and hoping for a baby boy. When Eugene came to be her parents had already been fully prepared for a boy and had spent a lot of money on her so they decided to keep the name picked out as well as all of the toys for a son and so they raised her as one.
at age 14 she took her role as headmistress and also began her training due to the death of parents. Her magical have not yet kicked in, but in a society where one's magic becomes stronger after meeting their mate, what happens when Eugene finds her's to be a weak slave?