Stephanie Seymour showed off her svelte bikini body in St. Barts during a family beach outing on Saturday. The mother of four donned a bright, patterned two-piece as she walked in the sand and bonded with her husband, businessman Peter Brant, and their daughter, Lily, in the water. Stephanie kicked off her annual Winter family vacation in St. Barts last week when she gathered with her little ones by a pool to get in a bit of bikini time. The supermodel mom walked around her terrace in a pink two-piece and later covered up in a matching sarong to write a note while lounging next to her King Charles spaniel. Stephanie and Peter have been taking their entire family to St. Barts for several years. Typically, they spend Christmas and New Year's Day in the warm comfort of the tropical locale, alongside the many stars who float into the tony vacation spot. Keep reading for more photos of Stephanie's holiday bikini moments!