Water’s End by Jessica Deforest

After a disastrous marriage and divorce, Anne falls in love with David, a man as beautiful as a Roman god and as elusive as a mirage. Wondering if love at first sight is even possible, she has an affair with him and knows instinctively that she will love him forever. When she loses him, she marries on the rebound and finds herself trapped in a nightmare. It is only when she is middle-aged and has given up all hope of ever finding him again that she discovers the secret that has kept them apart for so long.