Is it permissible for a mother to grant or register one-quarter of the house she owns to her grandson, with the consent of her daughters?

The questioner is permitted to dispose of her share of the house through various lawful means, such as a gift (hiba) or a bequest (wasiyya). If the questioner wishes to gift her share to her grandson, there is no objection to that, because, according to the preponderant opinion of scholars, grandchildren are not included with children in the obligation of equal treatment in giving. The gift must immediately transfer ownership of her share to the grandson and not be contingent upon her death, which would make it a bequest. This is because a bequest is not permissible for more than one-third of the estate unless the heirs approve, and this grandson does not inherit as long as his father is alive.