On last night’s premiere of The Real Housewives of New York Season 5 (Season 5, Episode 1: “A New New York”), the very sexy Sonja Morgan did what she does best: threw a party at her townhouse. But upon meeting new girl Aviva Drescher, Sonja’s history with Aviva’s ex-husband Harry Dubin came up, and seemed to cause some tension. So what exactly is the story? Did...