What is the ruling of Islamic law regarding a marriage that took place without the knowledge of the family? And is that act considered a cover for a potential abomination, especially since the husband denies the marriage and wants a separation, and the matter has spread throughout the village?

It is not permissible to accuse a Muslim of indecency without clear proof, and this is considered one of the major sins. The Sharia has emphasized the sanctity of people's honor, ruling that one who slanders another is to be flogged, declared morally corrupt (fasiq), and have their testimony rejected. Allah Almighty says: "And those who accuse chaste women and then do not produce four witnesses - flog them with eighty lashes and never accept their testimony thereafter. And those are the defiantly disobedient." One must ignore rumors, for whoever engages in them without clear proof is a liar according to the text of the Quran. Allah Almighty says: "Why did they not produce for it four witnesses? And when they do not produce the witnesses, then it is those who are liars in the sight of Allah." The Sharia has taken precautions in the interactions between men and women who are not mahram by prohibiting looking, private seclusion (khalwa), and excessive familiarity, even with relatives. It is narrated from Uqbah ibn Amir that the Messenger of Allah (peace be upon him) said: "Beware of entering upon women." It was asked: "What about the in-law (hamw)?" He replied: "The in-law is death."