A Miami international tax attorney and a Belgian firm are fighting over a host of Coral Gables mansions and other properties—with the attorney blaming her vengeful ex-fiance and the Belgian firm claiming she committed fraud.

Agorive NV sued attorney Suzanne DeWitt, claiming the company and its predecessor, agrochemical business Percival SA, had hired her to help with their $13.5 million investment in real estate here. Instead, she has kept the properties and their rental income and lives in one of the Gables homes, according to the lawsuit.