Reference: Fataawa Noor ‘alad-Darb – Question No.6486, Page 310, Volume 12
Question: I live [together] with my father, my mother, my wife and my brothers in one house, and sometimes I bring something specifically for my wife to eat – without my parents knowing [about it]. And privately together, my wife and I eat; so what is the ruling regarding that?
Response: There is no harm in you bringing something specifically for your wife to eat, with the condition that you already maintain your [Islaamically] required duty towards your family, i.e. your father, your mother and your brothers. However, in this situation [with your wife – which you have described], you must be sure that you do so privately – and that the [rest of the family] are not aware of it. That is so Shaytaan does not whisper to them, and cause dissension between you and them.