Kamasutra 1.5.3

1.5.3

tatra nāyikās tisraḥ kanyā punarbhūr veśyā ca. iti.

Nayikas, therefore, are of three kinds, viz., maids, women twice married, and public women. Gonikaputra has expressed an opinion that there is a fourth kind of Nayika, viz., a woman who is resorted to on some special occasion even though she be previously married to another. These special occasions are when a man thinks thus:—