When someone returns from a journey at night, he should better avoid joining his family. But this undesirable act in the sight of the Shari'ah is operative only in the case he arrives home without informing his family. By family, here is meant wife. However, there is nothing wrong with coming home with prior notification. Yet, if such a contact is not feasible, one's arrival at home at night will be considered as undesirable. But one can do so if necessity so demands.