Kamasutra 6.5.35

6.5.35

tyakṣyāmy enam anyataḥ pratisandhāsyāmi gamiṣyati dārair yokṣyate nāśayiṣyaty an:arthān aṅkuśa-bhūta uttarādhyakṣo 'syāgamiṣyati svāmī pitā vā sthāna-bhraṃśo vāsya bhaviṣyati cala-cittaś ceti manyamānā tadātve tasmāl lābham icchet..6.5.36 pratijñātam īśvareṇa pratigrahaṃ lapsyate adhikaraṇaṃ sthānaṃ vā prāpsyati vṛtti-kālo 'sya vā āsannaḥ vāhanam asyāgamiṣyati sthala-pattraṃ vā sasyam asya pakṣyate kṛtam asmin na naśyati nityam a:visaṃvādako vety āyatyām icchet. parigraha-kalpaṃ vācaret.

When a courtezan intends to abandon a particular lover, and take up with another one; or when she has reason to believe that her lover will shortly leave her, and return to his wives; or that having squandered all his money, and become penniless, his guardian, or master, or father would come and take him away; or that her lover is about to lose his position, or lastly, that he is of a very fickle mind, she should, under any of these circumstances, endeavour to get as much money as she can from him as soon as possible.