What is the ruling on a father gifting his house to his wife, and do the children have the right to claim it as heirs after the mother disposes of it?

If a father grants a house to his daughter, the grant (hiba) is not effective unless the daughter is enabled to dispose of the house during the father's lifetime, meaning she is able to sell it or grant it to someone else. Otherwise, the grant is void, and the house is considered part of the inheritance. Even if the father continues to live in it with his daughter, the grant is not complete. If the grant is completed, the mother is not permitted to favor one of her children in a gift; rather, she must deal justly among them.