Explanation Of Hurmat-e-Musahirat
This is described in the Quran 4: 22-23
According to Ghamidi saheb an established nihak does not get affected by an illicit relationship with someone in the in-laws. However, so far as the problem of Zina before marriage is concerned that it may affect the nikah with someone in the in-laws, with whom zina is committed, I don’t know what is the opinion of Ghamidi saheb, and I have not formed an opinion yet, working on it. Maybe Umar Qureshi might help.