Wayward Lady — Eva Zumwalt

Miss Anne Sinclair returns home from her London debut, because her sponsoring aunt is angry that Anne has refused two offers of marriage from wealthy but unlovable gentlemen. She finds her country estate sadly changed; widowed father remarried to a girl Annes age, her beloved race horses up for sale, and even Annes own room is occupied by the new Lady Sinclairs domineering half-sister.
A new friend, Lord Dunstan soon captures her heart. Then she is told he is betrothed to marry a woman who is wealthy and beautiful. Has happiness fled forever?