Bill and Vera have four grandchildren Jill, Joe, Di and Don.Bill and Vera are the grandparents of Jill, Joe, Di and DonDon is Bill's grandson. Bill is Don's grandfather.Vera is Di's grandmother. Di is Vera's granddaughter.Amy isn't the daughter of Bill and Vera.She's their daughter-in-law.Bill is Amy's father-in-law and Vera is her mother-in-law.Kate isn't Amy's real sister.She's her sister-in-law.Bob is Ray's brother-in-law and he's the son-in-law of Bill and Vera