I married a widow (let’s call her wilma) who has a grown-up daughter (call her dolly). My father (frank), who visited us often, fell in love with my stepdaughter and married her. Hence my father became my son-in-law and my step-daughter became my mother. Some months later my wife gave birth to a son (sammy) who became the brother-in-law of my father. as well as my uncle. The wife of my father, that is, my step-daughter, also had a son (steven)