The Golden Key — Lynne Collins

Nigel Brent was thankful that he was not prone to the devastating intensity of love. He had three women in mind: Vivien--intense, adoring and vulnerable; Margot--older, experienced and sophisticated; and Judith, who had firmly declared her intention to remain single. He had no wish to rush into marriage. The golden key of love was offered but he hesitated to turn it -- unaware that happiness was beyond the door of opportunity.