Does a forged signature affect the daughters' legitimate share of inheritance, and is it permissible to supplicate against the forger with the plea, "O Allah, I am oppressed, so grant me victory"? What is the meaning of "80 shares for the daughters," and are these shares combined with the 15 shares inherited by the wife after her death? Is it obligatory for the widow to perform an inventory of the inheritance? And does the Sharia give her a choice between remaining in her husband's house or returning to her father's house after her daughters marry?

Your daughters' right to inherit from the house is established and cannot be waived by your relinquishment. You do not have the right to waive their inheritance, whether they are adult and mature, except with their permission, or minors, unless you are their legal guardian and your action is in their best interest. As for you, if you did not waive your right willingly, then the action of your husband's father and his brother is an injustice to you and an assault on your right. This permits you to supplicate against them, for Allah Almighty says: "Allah does not like the public mention of evil except by one who has been wronged."