Fool Me Once, Book 1 by Catherine Bybee

Cynical divorce attorney Lori Cumberland lives by one motto: Love is grand, but divorce is a hundred grand. With one failed marriage under her own personal belt, Lori had fallen hard and early -- and it isn't something she plans on repeating. She's content focusing on the temporary marriages of her rich and famous clients. When she joins some of her recent divorcées on a celebratory cruise, her only vow is fun, sun, and new friends. But Lori finds herself tempted by a jury of one.