Williams sports a fashion-forward blue kimono (the same one she wore while cheering on sister Venus Williams at the French Open) and a black dress in the shots, as she cradles her burgeoning belly in front of a picturesque background.
The 35-year-old athelete's fiance, Alexis Ohanian, shared a similar snap from their trip last month.
"Perfect weekend. ? @valvogt," he captioned the cute shot.