Liberty Ross didn't leave her house for "seven weeks" as she tried to deal with her husband's affair with Kristen Stewart.

The model appeared on the catwalk to showcase Alexander Wang's Spring 2013 collection at New York Fashion Week at the weekend in what was her first modeling assignment since it was revealed her director husband Rupert Sanders, 41, had an illicit relationship with the 22-year-old actress after meeting her on the set of Snow White and the Huntsman.

Although Liberty, 33, looked confident on the catwalk, she confessed she hadn't dared leave her home in the wake of the scandal. "I hadn't actually been out of my house for seven weeks so I was really anxious. But it felt amazing," she said, speaking to The Cut at the show's after-party.

Liberty did not dump Rupert after learning of his affair with Kristen - who was in a four-year relationship with her Twilight co-star Robert Pattinson - and is believed to be prepared to work to save their marriage for the sake of their children Skyla, seven, and five-year-old Tennyson.

"It's still too early to tell what will happen. She is talking to and seeing Rupert now for the kids, but as far as the marriage she's still processing everything that happened... No decisions have been made. It's been very hard on her dealing with this but she is very strong and keeping private about it," a source said.

Robert split from Kristen after he discovered her affair in July and he has now put the Los Angeles home they shared on the market.