Is a wife entitled to seek divorce if she discovers that her husband is engaged in pimping (taking women, with their consent, to men for a sum of money for fornication)?

It is not permissible for a woman to seek divorce without a legitimate reason. However, the husband's impiety and immorality are grounds for it, especially if he engages in pimping. If he persists in his vile act, she has the right to seek divorce or khul' from him.