Assalam alaikum, Is it mandatory in Islam for a girl to stay in the same house with her husbands father, mother, brother and sister? Is it wrong if the girl demands for a separate house from the husband when there is terrible adjustment problems between the wife and in laws and which is hampering the marriage between husband and wife? What does Islam says on this matter?

I don't know what Islam has to say, but in any culture that situation spells disaster for a marriage. I can imagine what you are going through!