Say this for Prince William: He knows how to romance a young lady. On a weeklong getaway to Mustique that began on April 28, William, 23—on break from officer training at Sandhurst—courted girlfriend Kate Middleton, 24, with luxury befitting a (future?) queen. On the celeb-friendly island, the two stayed in the luxe, ultra-secluded Villa Hibiscus, which rents for $14,000 a week. They played on a private yacht and swam with an entourage of 12—including Holly Branson, daughter of Virgin CEO Richard Branson—on a beach cleared of tourists. The usually low-key couple indulged in PDA aplenty, with tennis-court kisses and hugs at Basil’s bar, where William was seen barefoot. Back home, tabloids buzzed: “Will he pop the question?” asked Britain’s Daily Mail. Opines royal author Judy Wade: “They’re still young.” But the honeymoon? They’re on it.