Real Housewives of New York City star Kelly Bensimon showed off her toned body in a white Charlie by Matthew Zink bikini Sunday while enjoying a day on Miami Beach.

The reality star was spotted with a mystery man later in the day and the couple splashed around in the waves together.

Kelly deserved a little time off -- she's been busy raising her two kids and working on her Master's Degree. "I'm a single working parent getting my MBA. I rarely relax," she tweeted in October.