Pippa Middleton and her husband James Matthews [1] have been celebrating the festive season in St. Barts, and on Wednesday, the new parents were spotted taking a dip in the ocean during a day at the beach. Pippa — who gave birth to the couple's son, Arthur [2], just days after attending Princess Eugenie's wedding in October — wore a white bikini as she and James went for a swim together and stayed close in the ocean; they did the same back in September during their romantic Italian babymoon [3], though Pippa looked just a tiny bit different [4] in her two-piece. Seriously, are you seeing that muscle tone?

The fitness-loving couple tied the knot in May 2017, and have reportedly been staying at the Caribbean island's exclusive Eden Rock Hotel, which is owned by James's family [5]. We last saw James and Pippa when they stepped out for a Christmas carol service in London [6] with Prince Harry and Meghan Markle [7] in early December. Around the same time, it was announced that the posh Chelsea apartment Pippa used to share [8] with her older sister Kate is on the market, to the tune of a casual £1.95 million. Not too shabby.