Don't sweat it Ray. Lilli is not that strong of a storm and last I saw well below Jamaica. If the ship is bound for any weather that is questionable the Captain will steer around it and visit other ports.
That said, the seas can get a bit rough for a long way away from the storm so it might get a little, repeat little, bumpy. Bring along some motion sickness medicine (beer works fine for me) and have a good time.