Ross, 34, who raises two children with Sanders, made her comeback at Alexander Wang's runway show during New York fashion week last month. The model opened up about the scandal backstage in a video chat.
"I believe that we're all on journeys and we are all given lessons at certain times in our lives... Sometimes, when things seem really bad, you have to be able to see the good and learn from it, and just move forward as graciously as possible," she said.
Although she had recently been pictured at counselling sessions with her husband, 41, Ross indicated that she is not planning to reconcile just yet.
"This year was the end of some things and the beginning of something else. Beginnings and endings are always exciting."
When asked about her life, Ross said, "I have a really good balance. I'm very happy with my life, and I'm lucky. I have good people. I have two amazing children."
Ross co-starred in her husband's feature film debut 'Snow White and the Huntsman', playing Queen Eleanor opposite Kristen.
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Sanders and Stewart are said to have got involved while shooting the film. Their affair became public when the two were spotted kissing in a car.
Both Kristen, 22, and Sanders apologised by issuing statements.
Kristen is said to be back with her 'Twilight' co-star Robert Pattinson after a brief break-up following the scandal.