Liberty Ross on September 17, 2012 in Soho, London. Credit: Splash News

Liberty Ross is making the most of her newfound . . . well, liberty.

Following her triumphant New York Fashion Week debut on September 8 (the 33-year-old supermodel walked in Alexander Wang's runway show), the estranged wife of director Rupert Sanders stepped out in London Monday night with a dashing mystery man by her side.

Ross wore leather leggings and a fur coat for the outing with her friend, who donned a navy three-piece suit. Noticeably absent from her ensemble? Her wedding ring.

Multiple insiders tell Us Weekly that things with her husband of ten years are still very much up in the air following revelations Sanders, 41, had cheated on her with his Snow White and the Huntsman leading lady, Kristen Stewart. (Sanders and Ross have two children together, Skyla, 7, and Tennyson, 5.)

As a source close to the couple recently told Us, "It's still too early to tell what will happen with them."