For 28 years the world-renowned interior designer Bunny Williams has been involved in a passionate love affair with an 18th-century New England manor house that she found in sad repair. From the moment she walked up the driveway and her palms began to perspire, Williams knew she wanted the affair to last forever. In her sumptuous book, An Affair with a House, the venerable decorator describes in detail how she and her husband, antiques dealer John Rosselli, rescued, nurtured, renovated, and decorated the well-worn house, giving it new life as they restored each room, resurrected the abandoned gardens, and filled this weekend home with family and friends.