Grace shadows each of my steps, staying strictly behind me as we take in the magnificence of the penthouse residence. Glossy marble floors and twenty-foot ceilings make the space bright and airy, if not a touch institutional. Where Zeno’s apartment showcases an earthy, modern design, Christiano’s place is ultra-contemporary. White on white with the occasional splash of black or red or silver. The simple palette enables the sweeping New York skyline to serve as the focal point, visible through enormous plate glass windows the full length of the main living area and curving around toward the kitchen, making the dining room appear suspended over the city. “You must be Luisa. I’m Arianna De Bellis, but you’re welcome to call me Ari.” A beautiful young woman with black hair and striking blue e

