Paul McCartney and his wife Nancy Shevell are lapping up the sunshine and enjoying a romantic time in the Caribbean.In photos published by Mail Online, the Beatles singer, 78, and his wife Nancy, 61, were pictured relaxing and sunbathing on a white sandy beach, as well as enjoying a dip in the tropical waters.MORE: Paul McCartney's epic £16.5m home is a tribute to The BeatlesWhile Paul wore bright purple swimming shorts, Nancy showcased her fabulous figure in a black swimsuit that featured a