It was an emotional night for Mary Lou Retton on “Dancing with the Stars,” where she broke the news that she and husband Shannon Kelly divorced earlier this year after 27 years of marriage. After she was sent packing, “Extra” spoke with Retton, who explained her decision to share her divorce on the show. The 59-year-old asserted, “Secrets keep you locked up and it really wasn’t that big of a secret, divorce. How many people go through... a lot.”