A Reluctant Bride — Christina Laffeaty

Attractive Saide Wilson agrees to make a dreadful sacrifice in order to save her young brother. She has agreed to marry a dying stranger, Adam Preston. In return she will inherit the Tara estate. -- Suddenly, Adam recovers from his mysterious ailment and demands that their marriage be annulled. But during their time together Sadie has come to love this strange man, despite the rumors that he murdered his first wife.

Sadie refuses to leave Adam until one night someone tries to strangle her. Horrified, she wonders if she can now escape.

Also published as The Mistress of Tara