Hailey Bieber is one hot mama-to-be! On Sunday, June 23, the model stepped out in two different monochromatic looks while visiting New York City with her husband, Justin Bieber, for the opening of her Rhode Skin pop-up in Manhattan. At first, Hailey kept things business casual in a custom LaQuan Smith camel-colored body-con maxi dress and a matching Magda Butrym blazer. The skincare guru, 27, accessorized her coordinated ensemble with Femme G63 slingback heels in the color exotic biscuit, a Courrèges brown grained leather bag and a chic pair of sunglasses. Justin, 30, on the other hand, opted …