Shadows of the Past — Elaine Shelabarger

When scandal forces Adeline to flee London society, she finds a haven in a tiny English hamlet in Devonshire, where she takes up the post of village schoolmistress. The young widow of the disgraced Sir Hugh Delahaye, Adeline reverts to her maiden name and is determined to leave the past behind. When she encounters Guy Ashleigh, the handsome and charismatic young ward of the village squire, they fall passionately in love, but Guy is expected to marry his childhood sweetheart. When jealousy forces them apart and the secrets of the past catch up with them, Adeline sees no alternative but to run away. Somehow, they must find a way to overcome the obstacles that threaten to destroy their future together.