Kamasutra 7.1.22

7.1.22

ūrdhvam api saṃvatsarāt pariṇītena nimantryamāṇā lābham apy utsṛjya tāṃ rātriṃ tasyāgacched iti veśyāyāḥ *pāṇigrahaṇavidhiḥ saubhāgyavardhanaṃ ca/

When the daughter of a courtezan is thus given to a man, the ties of marriage should be observed for one year, and after that she may do what she likes. But even after the end of the year, when otherwise engaged, if she should be now and then invited by her first husband to come and see him, she should put aside her present gain, and go to him for the night.

Such is the mode of temporary marriage among courtezans, and of increasing their loveliness, and their value in the eyes of others. What has been said about them should also be understood to apply to the daughters of dancing women, whose mothers should give them only to such persons as are likely to become useful to them in various ways.