Every now and then a Bunny can be spotted hopping across my family’s East Hampton garden. Usually it’s morning, when the creature is hungry, lured by the prospect of breakfast. She is also, I should clarify, human— Bunny being the nickname my mother, Candice Bergen, has used for me (and I for her) for over 15 years. For nearly as long, she and I have shared the lawn that separates the cottage, where I stay with my husband, Graham, from the main house, which was built by my stepfather, Marshall Rose, and his late wife, Jill. Ten years ago, Candy and Marsh set about updating the gardens with landscape architect Edmund Hollander. “The man works on vast farms, incorporating Henry Moore bronzes into rolling hills,” the elder Bunny admits. “We…