Legacy of Love — Harriet Schultz

Although this is book three of the series, it can be read as a stand alone.
Sebastían Castillo and Danielle Doherty shared one intense night of passion before they were separated by thousands of miles when he returned to his vineyard in Argentina and she became a top fashion designer in New York.
When their paths cross six years later, the intense attraction is still there, but Sebastián has made an enemy powerful enough to destroy him. Will sinister forces and emotional issues create obstacles that are impossible for them to overcome?