It's Wise to Forget — Elizabeth Hoy

"Wearing that dress will bring bad luck." But Sally shrugged off superstition and wore her wedding dress to the shipboard dance anyway. After all, she was planning to tell Ronnie Calvin, the fiancee she had seen for three years, that the marriage was off. For on the ship, Sally had met and fallen deeply in love with Martin Trent. And it seemed a simple matter for her to tell Ronnie all about her love for Martin. Then Sally arrived at the island to find Ronnie ill, penniless and desperately in need of for care.