Well it is pretty obvious that she will only graduate once she has become not just his maid for life, but his wife and the mother of his children. Yes indeed, his gramps, being the man of culture that he is, has high expectations of her.
Depending on one's point-of-view, "Gramps" is either (listed in no specific order): (1) A True Man Of Culture, (2) A Degenerate Horny Pervert, (3) "WHY NOT BOTH?"