What happens to a slave who accepts Islam?

As far as I know the slaves were non Muslim, and if there accept Islam they cannot be kept as slaves Adwa’ al-Bayaan, 3/387 > Shaykh al-Shanqeeti (may Allaah have mercy on him) said: > > If it is said: If the slave is a Muslim, how can he be kept as a slave > if the reason for which people may be taken as slaves is if they are > kaafirs who are waging war against Allaah and His Messenger? Source: islamqa.info https://islamqa.info/amp/en/answers/13737 So my question is what should a master do if his slave woman wants to convert right before intercourse(or during foreplay). Should he stop or continue the act?