What is the ruling on a father's action of writing a contract for the sale of his deceased wife's share of the property to their son? And is the son considered a false witness? What is the ruling on inheritance or a will that violates Sharia? How can expiation be made for this matter, and is it obligatory to inform the other heirs? What must the son do?

If the father genuinely gifted money to the questioner's mother or bought her gold as a true gift, and then the mother sold it and contributed the proceeds to purchase real estate, with half of the property becoming her ownership, and then she passed away, this half is considered an inheritance that must be divided according to Islamic law. Her husband receives one-fourth, and the remainder goes to her children, with the male receiving the share of two females.

Writing a falsified sales contract and testifying to it is a sin and a deprivation of the sisters' rights. This is an injustice that is impermissible, and one must repent from it by nullifying the false testimony or by approaching the sisters and obtaining their consent.

As for the brother, it is not permissible for him to take his mother's entire share if he knows the true situation. He is only entitled to his lawful share of the inheritance. This division is a compulsory obligation that must not be transgressed. Whoever does so has exposed himself to God's wrath.