What is the solution to the problem of a wife's lack of ghira (protective jealousy), and should relatives or friends be asked about her character?

It is not permissible to accuse one's wife of infidelity based on mere suspicion, for the honor of a Muslim is sacred; as Allah the Almighty says: "And those who harm believing men and believing women for [something] other than what they have earned have certainly borne a slander and a manifest sin."

The cause of these suspicions is the failure to safeguard the wife. You must fulfill your duty towards her by enjoining her to observe the hijab and chastity, and to avoid intermingling with non-mahram men. It is forbidden, by the consensus of Muslims, for a wife to appear before your brothers in her finery, and this is considered "dayouth" (a man who has no protective jealousy for his female kin); as the Prophet, peace and blessings be upon him, said: "There are three whom Allah will not look at on the Day of Resurrection: a disobedient son to his parents, a woman who imitates men, and the dayouth."

You must fear Allah concerning your household, for they are your flock, and you will be questioned about them. It is not appropriate to ask relatives and neighbors about her character, because it is an accusation against her and may lead to spreading evil about her. The solution lies in obliging the wife to fear Allah, to be chaste, and to observe the hijab. If she refuses, recourse can be made to abandoning her in bed, then to non-violent striking, and if that does not work, then divorce is recommended if the woman neglects the rights of Allah or is not chaste.