Article continues below advertisementGabrielle Union shared a risqué snap during a tropical island vacation in Jamaica.The actress, 53, slipped the pink straps of her ISMÊ Swim bandeau top off her shoulders while lounging by the ocean in a Tuesday, February 24, post.Union knelt on the ground and rested her head in her hand as she flaunted her toned physique.Article continues below advertisementSource: @gabunion/InstagramGabrielle Union celebrated her friend's birthday on a tropical vacation.Her hair was styled in braids, and she sported large black sunglasses.