The Ebony Swan — Phyllis A. Whitney

Susan Prentice has come home to Virginia's eastern shores to find her past. Twenty-five years ago, her mother fell to her death down the steps of the family's ancestral home. Susan has little memory of that accident, or of her maternal grandmother, Alex Montoro, a proud, intense, aging doyenne of the ballet.
But Susan's arrival has alarmed people who fear what may lie dormant in Susan's memory. Especially Alex. For she believes her daughter's fall was no accident--and her granddaughter is the only living witness to the tragedy. Together Alex and Susan must pry open the locked doors of the past, where burning passions, dark secrets, and hidden danger must be challenged to set the present free...