Should I compel my wife to wear the niqab, or should I leave her the freedom to choose and continue advising her, knowing that she is convinced it is recommended (mustahabb) or a Sunnah, while the questioner believes it is obligatory (wajib)?

A woman must cover her face from non-mahram men according to the soundest opinions of scholars. When there is fear of temptation or widespread corruption, the husband is obligated to command his wife to cover her face, and she must obey him in this, even if she has a differing opinion on the matter, because he has the right to protect his honor and ensure that his sanctity is not violated. This covering brings her closer to Allah, pleases her husband, and makes her like the believing women.