The 44-year-old just doesn't seem to get any older at all.
The beautiful brunette still has the perfect figure (and one that seemingly should belong to a 21-year-old) and showed it off in a brown two piece while she relaxed with her youngest two children, Harry, 15, and Lily, eight in the Caribbean hot-spot.
Incredible: Stephanie Seymour showed off her time-defying figure on holiday in St Barts with her family on Friday
She explained: 'I'd gained ten pounds, and was feeling insecure.'
As well as boasting an superb figure, it seems her marriage to Peter Brant is back on track.
In March 2009, couple were in the throes of one of the ugliest celebrity divorce battles.
But they revealed in September 2010 that they were calling off their acrimonious divorce despite already spending millions each on legal fees and had got back together.
Mom duty: Stephanie was busy looking after Harry and Lily but she obviously still finds time to work out
Blanket appeal: Stephanie was also a Victoria's Secret angel
Police were called to the couple's home following Seymour's complaint that Brant's security assaulted her, Brant accused the model of drug use and was seeking sole custody of their three children.
The couple are also parents to Peter Jnr, 19, as well as Dylan, 20 , from one of Stephanie's earlier relationships.
She says had an 'epiphany' the day before the pair we due to finalise their divorce and made a pledge to give their relationship another try.
Ten out of ten: But Stephanie has admitted she went through a stage where she felt big after putting on ten pounds
We can work it out: Stephanie got her figure back and her marriage back on track after diverting it from the divorce courts
She has also graced more than 300 magazine covers and considered the world's most celebrated swimsuit models.
She dated rock star Axl Rose in the early 1990s and starred in two Guns N' Roses videos, including the famous wedding montage for November Rain.
She's also dated Warren Beatty, Charlie Sheen, guitarist Tommy Andrews, and John Casablancas, the former head of Elite Model Management.
In charge: Stephanie laid the blanket out while Harry watched
Lunch is done: Mommy gets some exercise by carrying in the plates