Is it Islamically permissible for a family to deceive a woman into marrying their father, claiming they would support her and secure her future, and then, after his death, deprive her of inheritance by alleging that the father had relinquished his property to his children before the marriage, leaving the wife without shelter or money?

This is a deceitful and malicious trick. The issue is not a relinquishment of property while in good health; rather, it is a deception of the woman, leading her to believe she would be wealthy before marriage, only for the opposite to become apparent. The woman has the right to sue them judicially, but without overextending the litigation to avoid exorbitant expenses. If she does not see the matter progressing in her favor, she should withdraw, as she lacks judicial proof that can be relied upon, given that the relinquishment was done secretly.