 Jane's father and mother are usually referred to in the books as "Mr. Turpin" and "Mrs. Turpin", although it is revealed in later books that their names are Henry and Marcia respectively.Jane's elder sister Marjorie ("Marge" to Jane) was a young woman, and hence interested in boys - a fact often exploited to generate situation comedy.Her exact age has never been stated, but since she doesn't seem to go to school like Jane, it can be assumed that she is at least eighteen and possibly older (early twenties perhaps).