This chapter is about second wives and mistresses, who form the highest tier of sex work in China. These women live in a world of simultaneous precariousness and power. Their precariousness comes from their total dependence on one man. Unlike women in the lower tiers of the sex industry who solicit on the streets, in brothels, or in entertainment venues, for second wives, finding another client can be a complicated, drawn-out process. Their vulnerability also comes from the state of limbo inherent in a mistress arrangement. They know the relationship is temporary, and while they often yearn for marriage, as kept women they cannot take steps toward that goal. Their power, meanwhile, comes from the emotional dependence their clients sometimes have on them: smitten men will go to great lengths to keep their second wives happy and shower them with countless gifts to do so. It also comes from the knowledge that second wives sometimes gain of their client’s business activities, which provides these women with tools that can be used to help orchestrate his professional downfall when a relationship sours. This combination of vulnerability and strength presents a picture of second wives that belies their harsh reception in Chinese public opinion.