Assalaamu'alaikum! Ya Sheikh, I have a very important question to ask
you and this will Insha'Allah benefit many other Muslims. A friend of mine
was telling me that a wife cannot come in front of the husband's brother as
he is not her Mahram. My question is this: I live with my parents and
brother and sister. I and my brother pay the rent of the apartment.
Insha'Allah we are going to move to a rented house which will be bigger
and the rent will be payed by me and my brother. I had thought of getting
married because of the bigger house, but I don't know whether I could do
this now unless I get my own separate house. Please answer my question
as soon as possible,
Praise be to Allaah.
There is no harm in you and your wife living in one house with the rest of the family members you mentioned. All that you have to be careful about is that your wife does not go out in front of your brother or be alone with him in the house, because the Prophet (peace and blessings of Allaah be upon him) forbade non-mahrams (unrelated men) to enter upon women. He said: "Beware of entering upon women." One of the Sahaabah said to him, "O Messenger of Allaah, what about the brother-in-law?" He said: "The brother-in-law is death!" (Reported by al-Bukhaari, Fath al-Baari, 9/330).
Al-Nawawi, may Allaah have mercy on him, said: "What is referred to in the hadeeth is all the husbands (male) relatives apart from his father and sons. People customarily take the matter of a man being alone with his brothers wife as being of little consequence; to indicate the seriousness of the matter, it was likened to death. Indeed, one should be more cautious about the brother-in-law than about a stranger. The phrase "the brother-in-law is death" may have a number of meanings:
All this stems from
Islams keenness to protect households, to avoid evil and to preserve marriages
in the best possible way. You will find more details under question #217
May Allaah bless our Prophet Muhammad.