According to an eyewitness, Olsen and Sachs spent a week at the art dealer's island villa, keeping a low-profile throughout their trip. The two went for daily romantic walks on hills near the villa, where they were seen talking, listening to music and flirting.
Olsen and Sachs were first spotted together earlier this month, showing major PDA during a New York Nicks vs. Brooklyn Nets game at Madison Square Garden in New York City.
The two definitely appear to be moving fast, as Sachs has already met Olsen's twin sister, Mary-Kate. The couple attended the basketball game with Mary-Kate and her husband, 47-year-old Olivier Sarkozy.