Obligation of a wife covering up in front of her mature brother-in-law

Q: My twenty-one-year-old full brother, who is a bachelor lives with us. We all live with our father. Out of respect, appreciation and consideration for my father's feelings, I cannot ask him to give me an apartment to live alone. I am afraid that he may think that I, by asking so, (Part No. 17; Page No. 403) do not want to live with him anymore. Moreover, he interferes in my relationship with my wife, e.g. Sometimes he demands that I do not take her to her family unless I seek his permission. Furthermore, he takes my whole salary and gives me only my personal allowance while we are all equal as to living expenditure. I hope that you, helped by Allah, can inform me whether it is permissible for my brother to see my wife as we co-live in the same apartment. Is it permissible for my father to interfere in my relationship with my wife instructing me as to when I should take her to her family? Is it permissible for him to take my whole salary? I hope that you will give specific advice to my father so that he might be convinced. If I am wrong, please convince me. May Allah reward you with the best.

A: First: You must be dutiful to your parents and obey them in what is good. Second: You must order your wife to cover up in front of your brother, for it is impermissible for her to uncover her face in his presence nor to stay in seclusion with him. Third: Make an agreement with your father regarding living expenditure. May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.