The Shadow of Moonlight

Her marriage was sudden, short and secret
When she was swept off her feet at nineteen, even her husband's wealthy family didn't know about Meredith Sommerville's marriage to their son. But after Leigh's death his family had warmly accepted Meredith at their Australian homestead. Except for Evan Sommerville.
Convinced that Meredith was an unfaithful fortune huntress, Evan, the eldest son, made her life intolerable. His irrational dislike left Meredith torn between rage and her undeniable attraction to him.
Regretfully Meredith felt she must leave. Yet every time she tried, Evan, for some reason, was unwilling to let her go.