Part IV is an endeavor to make marriage lot fruitful. Part IV of Vatsayana's Kamasutra is written about a wife. Her character, behavior and lot more. This part is divided in two chapters, which are mentioned as follows.
Chapter I: This is mainly on the manner of Living of a Virtuous Woman, and of her behavior during the absence of her husband.
Chapter II: This chapter deals with the conduct of the eldest wife towards the other wives of her husband, and of the younger wife towards the elder ones. And also on the conduct of a virgin widow re-married, of a wife disliked by her husband, of the women in the king's harem, and lastly on the conduct of a husband towards many wives.