Is it permissible for a woman to remove the niqab that she wore to please her husband, while she is not convinced by it, especially since she is distressed by it and her husband has given her permission to do so?

Covering the face is obligatory according to the most preponderant scholarly opinions, and adhering to this view is more cautious, absolves one's responsibility more fully, and better preserves the woman and society from causes of temptation. If a woman uncovers her face based on another jurisprudential opinion that permits uncovering, she is not sinful, but she has missed out on a great good. However, if she has no legitimate religious justification for uncovering it, then she is sinful, even if her husband agrees.