For the past ten or so years, Caroline has taken herself off to Barbados for two weeks every winter, leaving her long-suffering husband to hold the fort. To be fair, it’s a freebie, so she can hardly be blamed. Her best friend, Bridie, is a tennis instructor and in return for giving lessons to the guests at a five-star hotel for a couple of weeks, not only does Bridie get free room and board but she gets to bring a plus one.