Estee Lauder group president John Demsey was spotted on the town “hand-in-hand” with former “Real Housewife” Kelly Bensimon, spies told Page Six, and buzz is the two are dating. They were holding hands at Mandolin Aegean Bistro in Miami’s Design District, our sources said. Dashing Demsey was previously married to Anouschka Izmirlian, while Bensimon’s ex is former Elle creative director and photographer Gilles Bensimon. Demsey told us while getting ready for a dinner he hosted Wednesday night at Mr. Chow for Zac Posen’s latest collection: “Kelly is a great girl who I have known for a long time, and we are good friends.” Bensimon added, “John and I are great friends. He’s the best.”