Stewart - who is dating her Twilight co-star Robert Pattinson - issued a public apology on Wednesday following the publication of images which appeared to show her in a clinch with her Snow White and the Huntsman director Sanders.
The moviemaker also released a statement apologizing to his wife and children for "the pain I have caused my family," and it has now emerged Ross opened up about their marriage in a candid interview just two weeks before the scandal hit headlines.
In the chat with Britain's You magazine, Ross, 33, revealed she struggled after moving from her native U.K. to Los Angeles and often felt lonely while Sanders was busy with his work.
She said, "Moving here (from London to L.A.) and starting a life all over again was a lot harder than I had anticipated. I just didn't think it would be as isolating and daunting as it turned out to be. I can honestly say that it took me five years to feel happy here...
"I would never say out loud that I am raising my children alone, but a lot of the time it has felt like that. I went from the glamor of working with Karl Lagerfeld and John Galliano to living on an isolated hilltop, with my husband gone most of the time."
Ross went on to insist the couple had overcome its problems, adding, "Everything feels so amazing now. We rode through the really hard times and we stuck it out..."
The two married in 2003 and are parents to a seven-year-old daughter, Skyla, and a five-year-old-son, Tennyson.