The ruling on a husband preventing his wife from uncovering her face before her mahram relatives through breastfeeding

Question:
The questioner asks: Honorable Shaykh, may Allah grant you success, is it permissible for a husband to prevent his wife from uncovering her face before her brothers through breastfeeding, who are her cousins, because he is not comfortable with it, and because he fears that one of them may lack proper conduct or piety? The Prophet (peace and blessings be upon him) said:

Answer:
If it is established that breastfeeding consists of five feedings, and that they occurred within the first two years, as stated in the hadiths, then the prohibition is established, and the status of being a mahram is confirmed. Is it not permissible for anyone to believe otherwise?
A woman may uncover herself before her mahram relatives through breastfeeding, whether they are her brothers through breastfeeding, her uncles through breastfeeding, or her children through breastfeeding. This is the ruling of the Shari'ah. A Muslim accepts the ruling of the Shari'ah. However, if she fears that one of the mahrams may look at her with desire when she uncovers her face in his presence, she should cover herself from him to ward off harm and ensure safety. But this is rare and few in number; this is rare and few in number. However, if such a case exists, she should be cautious with him, even if he is her father or her son by blood, if she fears fitnah (trial, discord or temptation) from him or sees signs of backbiting in him and that he does not respect her privacy. She should be cautious. Yes.