Speaking at Wednesday night's Heart Truth's Red Dress Fashion Show to kick off Fashion Week in New York City, she said people should not be so quick to judge Sheen.
"It's easy to judge on the outside, no one knows what's really going on behind closed doors," the New York Post quoted her as saying. "You never know what's going on unless you're in that person's shoes," she added.
Richards, who divorced Sheen in 2006 after four years of marriage, is raising their five-and six-year-old daughters. And she is reportedly doing everything in her power to protect the girls and herself from the countless reports in the media about Sheen.
"People will say what they want. But I've learned to ignore it," she said.