Liberty Ross Credit: John Sciulli/Getty Images for smart

Despite sitting in the front row at Alexander Wang's fashion show in New York City Feb. 9, Liberty Ross said she plans to keep a low-profile after filing for divorce from Rupert Sanders in late January.

The key to moving forward, Ross told the Associated Press at the event, is "keeping her head down" and "listening to her heart." The model married the Snow White and the Huntsman director in 2002; they are parents to daughter Skyla, 7, and son Tennyson, 5.

Ross filed for divorce six months after Us Weekly exposed Sanders' affair with the film's leading lady, Kristen Stewart. "She wasn't very happy, even before all this happened," a source recently said of Ross, 34. "Rupert put a lot of pressure on her to change her life for him and they moved to L.A. for him. She was such a big deal in England -- a bigger deal than him even."

In the divorce papers filed Jan. 25, Ross asked for joint custody of their children, in addition to spousal support and attorney's fees. Sanders, 42, is also seeking joint custody, but he has not asked for spousal support.

"They gave it a shot for the kids, [but] she was just so angry," a second source told Us of Ross' inability to forgive Sanders for his steamy makeout session with Stewart. "She's the kind of person who wouldn't really ever get over it."

Even so, a source added, the decision to end their marriage "was definitely mutual." Stewart, meanwhile, is still dating her longtime boyfriend and Twilight costar Robert Pattinson.

Now that she's single, Ross has been "spending time" with music executive Jimmy Lovine, a source recently told Us. Despite igniting romance rumors, they are "just getting to know each other better," the source cautioned.