Julianne "Jules" Wainstein thinks "secrets keep you sick," which is why she didn't hold back when discussing her eating disorder on Bravo's The Real Housewives of New York City last week.

In this week's issue of People, the Hong Korn-born socialite and Rhony newbie opens up about her battle with anorexia, which began in high school.

"I was swimming competitively in Florida, two-hour practices before school and after school, six days a week," says Weinstein, now 35. "I loved the discipline, I loved the schedule. I was comfortable that way."

When she quit the sport at around 17, she began to feel...