Through all the romantic interludes that Moll experiences throughout her life, a major portion of them tend to some form of incest. Her first sexual relationship was with the elder brother of the mayor's household. Though he never referred to her as "sister" (instead only jokingly as "Mrs. Betty," inferring a married title and thus of a more sexual nature than if he had called her "Miss") the others siblings of the household held her at a familial yet proper distance, recognizing their societal stature as apart from the lowly Moll. The mayor's daughters and Robin, the younger son, sometimes referred to her as "sister," but mostly "Betty". After Robin become enamoured with Moll and considered her in a romantic light, he ceased with the title of "sister".