A:
The acts of disobeying and deserting the father during his life are major sins that require repentance. The son must do many righteous deeds and pray for his father, asking forgiveness for him and giving charity on his behalf as much as he can. As for the mother, it is not obligatory on her to
carry out the father's order to sever relations with him. May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.